Kilobyte to Petabyte Converter
Convert kilobytes to petabytes with our free online data storage converter.
Quick Answer
1 Kilobyte = 1.000000e-12 petabytes
Formula: Kilobyte × conversion factor = Petabyte
Use the calculator below for instant, accurate conversions.
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Kilobyte to Petabyte Calculator
How to Use the Kilobyte to Petabyte Calculator:
- Enter the value you want to convert in the 'From' field (Kilobyte).
- The converted value in Petabyte will appear automatically in the 'To' field.
- Use the dropdown menus to select different units within the Data Storage category.
- Click the swap button (⇌) to reverse the conversion direction.
How to Convert Kilobyte to Petabyte: Step-by-Step Guide
Converting Kilobyte to Petabyte involves multiplying the value by a specific conversion factor, as shown in the formula below.
Formula:
1 Kilobyte = 1.0000e-12 petabytesExample Calculation:
Convert 10 kilobytes: 10 × 1.0000e-12 = 1.0000e-11 petabytes
Disclaimer: For Reference Only
These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.
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View all Data Storage conversions →What is a Kilobyte and a Petabyte?
A kilobyte (KB) is a unit of digital information storage equal to 10³ bytes (one thousand bytes). It uses the standard SI decimal prefix 'kilo-'. One kilobyte is equivalent to 8,000 bits.
Precise definitions:
- 1 kilobyte (KB) = 1,000 bytes (exactly 10³)
- 1 KB = 8,000 bits (8 kilobits)
- 1 KB = 0.001 megabytes (MB)
- 1 KB = 0.000001 gigabytes (GB)
Relationship to binary units:
- 1 kilobyte (KB) ≈ 0.977 kibibytes (KiB)
- 1 kibibyte (KiB) = 1,024 bytes = 2¹⁰ bytes
- 1 KiB ≈ 1.024 KB (2.4% larger)
Kilobyte (KB) vs. Kibibyte (KiB): Critical Distinction
This creates confusion in file size reporting:
Kilobyte (KB) — Decimal prefix:
- Exactly 1,000 bytes (10³)
- Based on SI standard (powers of 10)
- Used by storage manufacturers and most file size displays
- Standard for internet data, file downloads, document sizes
Kibibyte (KiB) — Binary prefix:
- Exactly 1,024 bytes (2¹⁰)
- Based on binary powers (powers of 2)
- Used by some technical specifications and older systems
- Sometimes still called "kilobyte" in error
Why file sizes sometimes seem inconsistent:
- Modern file managers: Show 1,000 bytes as "1 KB"
- Some technical specs: Might show 1,024 bytes as "1 KB"
- Percentage difference: KiB is 2.4% larger than KB
Kilobyte (KB) vs. Kilobit (Kb): Don't Confuse Them!
Another critical distinction:
Kilobyte (KB):
- Measures storage capacity (data at rest)
- 1 KB = 1,000 bytes
- Used for: file sizes, storage devices, memory
Kilobit (Kb or Kbit):
- Measures data transfer speed (data in motion)
- 1 Kb = 1,000 bits
- Used for: network speeds, modem connections
- 1 kilobyte = 8 kilobits (since 1 byte = 8 bits)
Real-world example:
- 56 Kbps dial-up modem downloads at ~7 KB/s (56,000 bits/second ÷ 8 = 7,000 bytes/second)
- File size: 10 KB file takes ~1.4 seconds to download at 56 Kbps
A petabyte (PB) is a unit of digital information storage equal to 10¹⁵ bytes (one quadrillion bytes). It uses the standard SI decimal prefix 'peta-'. One petabyte is equivalent to 1,000 terabytes or 1,000,000 gigabytes.
Precise definitions:
- 1 petabyte (PB) = 1,000,000,000,000,000 bytes (exactly 10¹⁵)
- 1 PB = 1,000 terabytes (TB)
- 1 PB = 1,000,000 gigabytes (GB)
- 1 PB = 8,000,000,000,000,000 bits (8 petabits)
Relationship to binary units:
- 1 petabyte (PB) ≈ 0.888 pebibytes (PiB)
- 1 pebibyte (PiB) = 1,125,899,906,842,624 bytes = 2⁵⁰ bytes
- 1 PiB ≈ 1.126 PB (12.6% larger)
Petabyte (PB) vs. Pebibyte (PiB): Enterprise-Scale Distinction
At petabyte scale, precision matters for enterprise planning:
Petabyte (PB) — Decimal prefix:
- Exactly 1,000,000,000,000,000 bytes (10¹⁵)
- Based on SI standard (powers of 10)
- Used by cloud providers, enterprise storage, data centers
- Standard for capacity marketing and planning
Pebibyte (PiB) — Binary prefix:
- Exactly 1,125,899,906,842,624 bytes (2⁵⁰)
- Based on binary powers (powers of 2)
- Used by technical specifications, some enterprise systems
- Standard for certain scientific and technical applications
Why the 12.6% difference matters:
- Data center planning: 100 PB = 88.8 PiB of actual capacity
- Backup systems: Capacity calculations affect retention policies
- Cloud costs: Billing based on decimal PB, but systems use binary PiB
Percentage difference: PiB is 12.6% larger than PB, so the gap grows with scale:
- 1 PB = 0.888 PiB (11.2% less)
- 10 PB = 8.88 PiB (11.2% less)
- 100 PB = 88.8 PiB (11.2% less)
Petabyte (PB) vs. Petabit (Pb): Enterprise Data Distinction
Another critical distinction for network planning:
Petabyte (PB):
- Measures storage capacity (data at rest)
- 1 PB = 1,000,000,000,000,000 bytes
- Used for: data lakes, archives, cloud storage
Petabit (Pb or Pbit):
- Measures data transfer (data in motion)
- 1 Pb = 1,000,000,000,000,000 bits
- Used for: network capacity, data center interconnects
- 1 petabyte = 8 petabits (since 1 byte = 8 bits)
Real-world example:
- Data center storage: 100 PB capacity
- Network capacity: 800 Pb/s interconnect speed
Note: The Kilobyte is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Petabyte belongs to the imperial/US customary system.
History of the Kilobyte and Petabyte
The "Kilo-" Prefix Origins (1960)
International standardization:
1960: 11th General Conference on Weights and Measures (CGPM):
- Officially adopted "kilo-" as the SI prefix for one thousand (10³)
- Derived from Greek "χιλιοι" (khilioi) meaning "thousand"
- Part of the expanded SI prefix system
Scientific context before computing:
- Originally used in physics and engineering (kilogram, kilometer, kilowatt)
- Computing adopted SI prefixes as storage capacity grew
Computing Era: KB Meets Binary (1960s-1990s)
When kilobytes became practical:
1960s: Early computer memory:
- Computers used binary addressing (powers of 2)
- Memory organized in 1,024 byte chunks for efficiency
- "Kilobyte" informally meant 1,024 bytes in computing contexts
1970s-1980s: Floppy disks and early storage:
- 8-inch floppy disks: ~80-256 KB capacity
- 5.25-inch floppy disks: 160-360 KB capacity
- File sizes measured in KB
1980s-1990s: Hard drives emerge:
- Early hard drives: 5-40 MB capacity
- Files still measured in KB (documents, programs, images)
- Internet downloads measured in KB/s
KB vs. KiB Ambiguity Crisis (1960s-1998)
Decades of confusion:
The root problem: Computer memory uses binary addressing (powers of 2), but SI prefixes are decimal (powers of 10).
1960s-1990s: Binary interpretation dominates computing:
- Computer scientists used "kilobyte" = 1,024 bytes (2¹⁰)
- Memory specifications, programming languages, OS reports
- Rationale: Memory addresses are naturally binary
1980s-1990s: Manufacturers begin using decimal:
- Storage makers used 1 KB = 1,000 bytes (exact SI definition)
- Marketing consistency: Aligned with other SI measurements
Consumer confusion:
- File size discrepancies: Same file might show different sizes in different programs
- Memory reporting: RAM often reported in binary KB while storage in decimal KB
- No universal standard: Context determined interpretation
IEC Binary Prefix Solution (1998-Present)
Official standardization to end confusion:
1998: IEC introduces binary prefixes (IEC 60027-2 standard):
- Kibibyte (KiB) = 1,024 bytes (2¹⁰)
- Mebibyte (MiB) = 1,048,576 bytes (2²⁰)
- Gibibyte (GiB) = 1,073,741,824 bytes (2³⁰)
Result: "Kilobyte" (KB) officially reserved for exactly 1,000 bytes (10³)
Current adoption status:
- File sizes and downloads: Universally KB (decimal)
- Internet speeds: KB/s (decimal for data transfer)
- Technical specifications: Increasingly use KiB for binary measurements
- General public: Still often confused, but decimal KB dominates consumer contexts
Modern Era (2000s-Present)
Kilobytes remain relevant for small measurements:
2000s: Internet and digital documents:
- Web pages: 20-100 KB typical
- Email attachments: KB to MB range
- Digital photos emerge: KB for thumbnails, MB for full images
2010s: Mobile and cloud computing:
- App sizes: KB for simple apps, MB for complex ones
- Text messages and documents: KB measurements
- API responses and small data transfers
2020s: IoT and edge computing:
- Sensor data: Often measured in KB
- Configuration files: KB range
- Small firmware updates: KB measurements
The "Peta-" Prefix Origins (1975)
International standardization for massive scales:
1975: 14th General Conference on Weights and Measures (CGPM):
- Officially adopted "peta-" as the SI prefix for one quadrillion (10¹⁵)
- Derived from Greek "πέντε" (pente) meaning "five" (representing 10¹⁵ = 1000⁵)
- Part of the expanded SI prefix system: tera (10¹²), peta (10¹⁵), exa (10¹⁸)
Scientific context before computing:
- Originally used in physics for extremely large measurements
- Theoretical unit until enterprise computing made it practical
Computing Era: PB Becomes Enterprise Reality (2000s-2010s)
When petabytes became essential for business:
2000s: Enterprise storage explosion:
- 2000s: Corporate data grew from TB to PB scale
- 2005: Google File System paper discussed PB-scale storage
- 2006: Amazon S3 launched, enabling PB-scale cloud storage
2010s: Big data and cloud computing:
- 2010s: Hadoop and big data made PB processing feasible
- 2012: Facebook data center design for PB-scale storage
- 2015: Cloud providers reach multi-PB customer bases
2010s: Scientific and research applications:
- Genomics: Human Genome Project data reached PB scale
- Astronomy: Telescope arrays generate PB annually
- Particle physics: CERN experiments produce PB of data
PB vs. PiB: Enterprise Ambiguity Resolution (1998-2010s)
Decades of enterprise-scale confusion:
1998-2000s: IEC binary prefix adoption:
- IEC introduces pebibyte (PiB) for binary petabytes
- Enterprise adoption: Mixed usage depending on context
- Cloud providers: Use PB (decimal) for marketing
2010s: Enterprise standardization:
- Data centers: Use PB for capacity planning
- Cloud billing: Based on PB (decimal)
- Technical specs: PiB for precision in some systems
Current adoption:
- Enterprise marketing: PB (decimal) dominates
- Technical specifications: PiB (binary) for precision
- Cloud APIs: PB (decimal) for user-facing metrics
Common Uses and Applications: kilobytes vs petabytes
Explore the typical applications for both Kilobyte (imperial/US) and Petabyte (imperial/US) to understand their common contexts.
Common Uses for kilobytes
Small File Size Measurement
Measuring small digital files and documents:
Document files:
- Text documents: Word processing files, notes, scripts
- Spreadsheets: Small data sets, budgets, simple calculations
- Presentations: Basic slide decks with text and simple graphics
Why kilobytes for documents:
- Right size scale: Most documents are 10-500 KB
- Universal compatibility: All operating systems and applications
- Easy comprehension: Consumers understand KB for documents
Web Development and Internet
Measuring web page components and data transfer:
Web page elements:
- HTML files: Core page structure
- CSS files: Styling and layout
- JavaScript files: Interactivity and functionality
- Small images: Icons, buttons, simple graphics
Internet data:
- Email messages: Text content and small attachments
- API responses: Small data payloads
- Configuration files: Settings and preferences
Programming and Development
Code files and small applications:
Source code:
- Scripts: Small programs and utilities
- Configuration files: Settings, preferences, environment variables
- Documentation: README files, comments, help text
Development artifacts:
- Build files: Small configuration files
- Package manifests: Dependency lists and metadata
- Test files: Unit tests and small test data
Data Transfer and Bandwidth
Measuring network transfer rates and small data movements:
Modem and dial-up speeds:
- Historical context: Understanding legacy internet speeds
- Technical specifications: Network equipment ratings
Small data transfers:
- File synchronization: Small changes and updates
- Remote monitoring: Sensor data and telemetry
- IoT devices: Small data packets from connected devices
When to Use petabytes
Enterprise Data Lakes
Corporate data storage and analytics:
Data Warehousing:
- Transactional data: 10-50 PB of sales, customer, inventory data
- Log files: 5-20 PB of application and system logs
- Analytics datasets: 1-10 PB of processed data for BI
Backup and Recovery:
- Full system backups: 50-200 PB for large enterprises
- Retention archives: 100-500 PB for compliance data
- Disaster recovery: Multi-PB offsite backup systems
Cloud Infrastructure
Hyperscale cloud storage and computing:
Object Storage:
- S3-compatible services: PB-scale customer data storage
- Content delivery: PB of cached web content and media
- Archive storage: PB of compliance and regulatory data
Big Data Analytics:
- Data lakes: 10-100 PB of raw data for processing
- Machine learning: 1-10 PB of training datasets
- Real-time analytics: PB-scale streaming data processing
Scientific Computing
Research and high-performance computing:
Supercomputing Centers:
- Oak Ridge National Lab: 5 PB storage capacity
- Argonne National Lab: 3 PB storage capacity
- European supercomputing: 10 PB combined capacity
Research Data Repositories:
- GenBank (NCBI): 0.5 PB of genomic sequences
- Protein Data Bank: 0.001 PB of structural data
- Earth observation data: 2 PB annually from satellites
Media Production and Distribution
Professional content creation and delivery:
Film and Television:
- 4K/8K production: 1-5 PB per major film
- Visual effects: 10-20 PB of render farm storage
- Post-production: 2-10 PB of working files
Broadcasting:
- Live streaming infrastructure: 5-20 PB of content delivery
- On-demand libraries: 50-200 PB of encoded content
- Archive storage: 100+ PB of historical programming
Additional Unit Information
About Kilobyte (KB)
How many bytes are in a kilobyte (KB)?
There are exactly 1,000 bytes in 1 kilobyte (KB). This is the official SI definition adopted by the International Electrotechnical Commission (IEC). However, historically, "kilobyte" was often used informally to mean 1,024 bytes in computing contexts. The correct term for 1,024 bytes is kibibyte (KiB). In modern usage, KB almost always means 1,000 bytes, especially for file sizes and data transfer.
What is the difference between KB and KiB?
KB (kilobyte) uses the decimal prefix 'kilo-' and equals 1,000 bytes (10³). KiB (kibibyte) uses the binary prefix 'kibi-' and equals 1,024 bytes (2¹⁰). A kibibyte is 2.4% larger than a kilobyte (1 KiB = 1.024 KB). The IEC introduced KiB in 1998 to eliminate confusion between decimal (KB) and binary (KiB) interpretations of "kilobyte."
How many kilobytes in a megabyte?
There are 1,000 kilobytes (KB) in 1 megabyte (MB). This follows the SI decimal standard. Therefore, 1 MB = 1,000 KB = 1,000,000 bytes. However, historically, some systems used binary counting where 1 MB = 1,024 KB = 1,048,576 bytes. The correct term for the binary version is mebibyte (MiB).
What does 'kilo' mean in kilobyte?
The prefix "kilo-" means one thousand (10³). It comes from the Greek word "χιλιοι" (khilioi) meaning "thousand." In the International System of Units (SI), "kilo-" represents multiplication by 1,000. Therefore, a kilobyte is one thousand bytes, a kilogram is one thousand grams, and a kilometer is one thousand meters.
How much storage is 1 KB?
1 KB can store approximately:
- 1,000 characters of plain text
- One short email message (5-10 KB typical)
- One simple web page without images (10-20 KB)
- One small icon or simple graphic (5-10 KB)
- One configuration file or small document (1-50 KB)
For reference, the average English sentence is about 100-150 characters, so 1 KB holds roughly 7-10 typical sentences of text.
Why do some files show different sizes in different programs?
This happens due to the historical KB vs. KiB confusion. Some older programs or technical specifications still use binary counting (1,024 bytes = 1 KB), while modern file managers use decimal counting (1,000 bytes = 1 KB). The same file might show as 10 KB (decimal) in Windows Explorer but could be calculated as 9.77 KB (binary) in some technical contexts. Modern standards have largely resolved this, with KB meaning 1,000 bytes for consumer applications.
How long does it take to download 1 KB?
Download time depends on your internet connection speed:
Common internet speeds:
- 56 Kbps (dial-up): ~0.14 seconds (7 KB/s)
- 1 Mbps: ~0.008 seconds (125 KB/s)
- 10 Mbps: ~0.0008 seconds (1.25 MB/s = 1,250 KB/s)
- 100 Mbps: ~0.00008 seconds (12.5 MB/s = 12,500 KB/s)
Calculation: Divide 1,000 bytes by your speed in bytes per second. Remember that real-world speeds are typically 80-95% of advertised maximums due to network overhead.
Is KB still relevant in the age of gigabytes?
Yes, kilobytes remain very relevant for many applications:
Still commonly used for:
- Small files: Documents, emails, configuration files
- Web elements: HTML pages, CSS files, small images
- Data transfer: Measuring small downloads and API responses
- Programming: Source code files, scripts, small applications
- IoT and sensors: Small data packets and telemetry
When KB is appropriate:
- File sizes under 1 MB (most documents, web content, small apps)
- Precise measurements where MB would show decimals
- Technical specifications for small components
- Historical context for understanding older systems
What replaced kilobytes for larger measurements?
For larger measurements, kilobytes were replaced by:
- Megabytes (MB): For files, images, small programs (1,000 KB = 1 MB)
- Gigabytes (GB): For large files, storage devices, movies (1,000 MB = 1 GB)
- Terabytes (TB): For very large storage, databases, archives (1,000 GB = 1 TB)
However, kilobytes remain the standard for the "human scale" of small digital content.
How do kilobytes relate to bits?
1 kilobyte (KB) = 8 kilobits (Kb) because each byte contains 8 bits. This relationship is crucial for:
- Data transfer calculations: Converting between storage (bytes) and transmission (bits)
- Network speeds: Internet connections measured in bits/second (bps)
- Digital communication: Understanding bandwidth and data flow
Example: A 56 Kbps modem transfers 56,000 bits per second = 7,000 bytes per second = 7 KB/s.
About Petabyte (PB)
How many bytes are in a petabyte (PB)?
There are exactly 1,000,000,000,000,000 bytes (one quadrillion bytes, or 10¹⁵ bytes) in 1 petabyte (PB). This is the official SI definition. For perspective, this is enough storage to hold:
- All printed books in the world: ~10,000 times over
- Every email ever sent: ~5,000 times over
- All photos ever taken: ~100 times over
- The complete human genome: ~50 million times over
How many terabytes are in a petabyte?
There are exactly 1,000 terabytes (TB) in 1 petabyte (PB). This follows the SI decimal standard where 1 PB = 1,000,000,000,000,000 bytes and 1 TB = 1,000,000,000,000 bytes. Therefore, 1 PB = 1,000 TB. To convert PB to TB, multiply by 1,000. To convert TB to PB, divide by 1,000.
How many gigabytes are in a petabyte?
There are 1,000,000 gigabytes (GB) in 1 petabyte (PB). Using the conversion: 1 PB = 1,000 TB, and 1 TB = 1,000 GB, so 1 PB = 1,000 × 1,000 GB = 1,000,000 GB. This means 1 PB could theoretically store 1 million typical hard drives worth of data.
What is the difference between PB and PiB?
PB (petabyte) equals exactly 1,000,000,000,000,000 bytes (10¹⁵) using the SI decimal prefix system. PiB (pebibyte) equals exactly 1,125,899,906,842,624 bytes (2⁵⁰) using the IEC binary prefix system. A pebibyte is approximately 12.6% larger than a petabyte (1 PiB ≈ 1.126 PB).
This distinction matters at petabyte scale:
- Cloud storage providers advertise in PB (decimal)
- Technical specifications may use PiB (binary)
- 100 PB of cloud storage = 88.8 PiB of actual binary capacity
How much data do major cloud providers store?
Major cloud providers operate at petabyte to exabyte scale:
Amazon Web Services (AWS):
- S3 object storage: 200+ PB of customer data
- Total storage capacity: 500+ PB across all services
- Glacier archive: 100+ PB of long-term storage
Microsoft Azure:
- Blob storage: 150+ PB of customer data
- Total capacity: 300+ PB across global infrastructure
- Archive storage: 75+ PB of cold data
Google Cloud:
- Cloud Storage: 100+ PB of customer data
- Total capacity: 200+ PB of infrastructure
- Nearline/Archive: 50+ PB for backup and compliance
These capacities continue growing as cloud adoption increases.
What uses the most petabytes?
Top storage consumers at PB scale:
-
Social media and user-generated content:
- Facebook/Meta: 300+ PB of photos, videos, messages
- YouTube/Google: 50+ PB of user-uploaded content
- Instagram: 100+ PB of media content
-
Cloud storage and data lakes:
- Enterprise data warehouses: 10-100 PB
- Backup and archive systems: 50-200 PB
- Machine learning datasets: 1-10 PB
-
Scientific and research data:
- Genomics databases: 10-50 PB
- Astronomical surveys: 10-50 PB
- Climate modeling: 5-20 PB
-
Media and entertainment:
- Netflix: 10+ PB of encoded content
- Disney+: 5+ PB of 4K content
- Hollywood post-production: 20-50 PB per studio
Enterprise storage at PB scale requires specialized infrastructure and management strategies.
Conversion Table: Kilobyte to Petabyte
| Kilobyte (KB) | Petabyte (PB) |
|---|---|
| 0.5 | 0 |
| 1 | 0 |
| 1.5 | 0 |
| 2 | 0 |
| 5 | 0 |
| 10 | 0 |
| 25 | 0 |
| 50 | 0 |
| 100 | 0 |
| 250 | 0 |
| 500 | 0 |
| 1,000 | 0 |
People Also Ask
How do I convert Kilobyte to Petabyte?
To convert Kilobyte to Petabyte, enter the value in Kilobyte in the calculator above. The conversion will happen automatically. Use our free online converter for instant and accurate results. You can also visit our data storage converter page to convert between other units in this category.
Learn more →What is the conversion factor from Kilobyte to Petabyte?
The conversion factor depends on the specific relationship between Kilobyte and Petabyte. You can find the exact conversion formula and factor on this page. Our calculator handles all calculations automatically. See the conversion table above for common values.
Can I convert Petabyte back to Kilobyte?
Yes! You can easily convert Petabyte back to Kilobyte by using the swap button (⇌) in the calculator above, or by visiting our Petabyte to Kilobyte converter page. You can also explore other data storage conversions on our category page.
Learn more →What are common uses for Kilobyte and Petabyte?
Kilobyte and Petabyte are both standard units used in data storage measurements. They are commonly used in various applications including engineering, construction, cooking, and scientific research. Browse our data storage converter for more conversion options.
For more data storage conversion questions, visit our FAQ page or explore our conversion guides.
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All Data Storage Conversions
Other Data Storage Units and Conversions
Explore other data storage units and their conversion options:
- Bit (b) • Kilobyte to Bit
- Byte (B) • Kilobyte to Byte
- Kilobit (kb) • Kilobyte to Kilobit
- Megabit (Mb) • Kilobyte to Megabit
- Megabyte (MB) • Kilobyte to Megabyte
- Gigabit (Gb) • Kilobyte to Gigabit
- Gigabyte (GB) • Kilobyte to Gigabyte
- Terabit (Tb) • Kilobyte to Terabit
- Terabyte (TB) • Kilobyte to Terabyte
- Petabit (Pb) • Kilobyte to Petabit
Verified Against Authority Standards
All conversion formulas have been verified against international standards and authoritative sources to ensure maximum accuracy and reliability.
International Electrotechnical Commission — Binary prefixes for digital storage (KiB, MiB, GiB)
International Organization for Standardization — International standards for quantities and units
Last verified: February 19, 2026