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Atmosphere to Kilopound per Square Inch Converter

Convert atmospheres to kilopounds per square inch with our free online pressure converter.

Quick Answer

1 Atmosphere = 0.014696 kilopounds per square inch

Formula: Atmosphere × conversion factor = Kilopound per Square Inch

Use the calculator below for instant, accurate conversions.

Our Accuracy Guarantee

All conversion formulas on UnitsConverter.io have been verified against NIST (National Institute of Standards and Technology) guidelines and international SI standards. Our calculations are accurate to 10 decimal places for standard conversions and use arbitrary precision arithmetic for astronomical units.

Last verified: February 2026Reviewed by: Sam Mathew, Software Engineer

Atmosphere to Kilopound per Square Inch Calculator

How to Use the Atmosphere to Kilopound per Square Inch Calculator:

  1. Enter the value you want to convert in the 'From' field (Atmosphere).
  2. The converted value in Kilopound per Square Inch will appear automatically in the 'To' field.
  3. Use the dropdown menus to select different units within the Pressure category.
  4. Click the swap button (⇌) to reverse the conversion direction.
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How to Convert Atmosphere to Kilopound per Square Inch: Step-by-Step Guide

Converting Atmosphere to Kilopound per Square Inch involves multiplying the value by a specific conversion factor, as shown in the formula below.

Formula:

ksi = atm × 0.0146959

Example Calculation:

1 atm = 0.014696 ksi

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.

Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.

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What is a Atmosphere and a Kilopound per Square Inch?

1 atm = 101,325 Pa = 101.325 kPa = 14.696 PSI = 1.01325 bar = 760 mmHg = 760 Torr = 29.92 inHg

Why "Atmosphere"?

The atmosphere unit is uniquely important because:

  • Defined exactly: CIPM (1954) set 1 atm = 101,325 Pa (exact)
  • Sea level reference: Based on average atmospheric pressure (not variable)
  • Universal constant: Used identically worldwide (unlike PSI or bar)
  • Chemistry standard: All chemistry/physics equations reference 1 atm conditions
  • STP baseline: "Standard Temperature and Pressure" = 0°C, 1 atm exactly

1 ksi = 1,000 PSI = 6.895 MPa = 68.95 bar = 6,895 kPa = 47.88 atm

ksi = kilo-pound per square inch = 1,000 pounds-force per square inch

Also written as: KSI, 1000 PSI, 1 KPSI

Note: The Atmosphere is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Kilopound per Square Inch belongs to the imperial/US customary system.

Common Uses and Applications: atmospheres vs kilopounds per square inch

Explore the typical applications for both Atmosphere (imperial/US) and Kilopound per Square Inch (imperial/US) to understand their common contexts.

Common Uses for atmospheres

Chemistry: Gas laws (PV=nRT), reaction conditions, vapor pressures, standard conditions (STP).

  • Ideal Gas Law: P V = n R T (pressures typically in atm in chemistry)
  • Gas tables: Vapor pressures often given at 1 atm
  • STP (Standard Temperature & Pressure): Exactly 1 atm, 0°C (sometimes 25°C modern definition)

Diving: Depth pressure calculations (1 atm per 10m/33ft water).

  • Critical for: Decompression sickness risk, nitrogen narcosis, oxygen toxicity
  • Rule of thumb: Every 10 meters adds 1 atm pressure

Physics: Standard reference pressure for equations, thermodynamics.

  • Thermodynamics: Heat capacities typically defined at 1 atm
  • Boiling points: Water boils at 100°C only at 1 atm
  • Phase diagrams: Reference state for matter phase transitions

Engineering: High-pressure systems, pressure vessels, gas storage.

  • Vessel ratings: Designed for X psig over 1 atm ambient
  • Cylinder classifications: Based on working pressure as multiples of atm

When to Use kilopounds per square inch

Structural Steel: Yield strength, tensile strength specifications (AISC standards). Concrete: Compressive strength testing, design specs. Materials Testing: Tensile testing, compression testing. High-Pressure Systems: Hydraulics, pressure vessels, extreme pressures.

Additional Unit Information

About Atmosphere (atm)

How many PSI is 1 atmosphere?

1 atm = 14.696 PSI (often rounded to 14.7 PSI)

Examples:

  • 2 atm = 29.4 PSI (10m dive depth)
  • 3 atm = 44.1 PSI (20m dive depth)
  • 10 atm = 147 PSI (compressed air)
  • 100 atm = 1,470 PSI (gas cylinder)

Atmosphere to PSI converter →

How many atmospheres in a bar?

1 bar = 0.986923 atm (approximately 1 atm, ~1.3% difference)

Conversion:

  • 1 atm = 1.01325 bar
  • 10 atm = 10.1325 bar
  • 100 atm = 101.325 bar
  • 200 atm = 202.65 bar (scuba tank)

Why different?: Bar defined as exactly 100,000 Pa; atm defined as 101,325 Pa.

Atmosphere to Bar converter →

What pressure is 2 atmospheres?

2 atm = 202,650 Pa = 202.65 kPa = 29.4 PSI = 2.026 bar = 1,520 mmHg

Physical meaning:

  • Diving 10 meters (33 feet) underwater
  • Absolute pressure at 10m depth
  • Double the surface atmospheric pressure
  • Pressure inside a pressure cooker

How do I calculate diving depth pressure?

Formula: Total Pressure (atm) = 1 + (Depth in meters ÷ 10)

Or: Total Pressure (atm) = 1 + (Depth in feet ÷ 33)

Examples:

  • 10m (33ft): 1 + (10÷10) = 2 atm
  • 20m (66ft): 1 + (20÷10) = 3 atm
  • 30m (99ft): 1 + (30÷10) = 4 atm
  • 40m (131ft): 1 + (40÷10) = 5 atm

Note: Freshwater calculation uses 10.3m; saltwater 10m per atmosphere.

What is STP in chemistry?

STP (Standard Temperature and Pressure):

  • Pressure: 1 atm = 101,325 Pa = 100 kPa (IUPAC uses 100 kPa)
  • Temperature: 0°C = 273.15 K

Purpose: Reference conditions for gas law calculations

Molar volume at STP: 22.414 L/mol (IUPAC: 22.711 L/mol at 100 kPa)

SATP (Standard Ambient):

  • Pressure: 1 atm = 101,325 Pa
  • Temperature: 25°C = 298.15 K
  • Molar volume: 24.465 L/mol

More commonly used in modern chemistry.

About Kilopound per Square Inch (ksi)

How do I convert ksi to MPa?

Formula: MPa = ksi × 6.895

Examples:

  • 36 ksi = 248 MPa (A36 steel)
  • 50 ksi = 345 MPa (A992 steel)
  • 60 ksi = 414 MPa (rebar)
  • 100 ksi = 689 MPa (high-strength)
  • 1 ksi = 6.895 MPa

ksi to MPa converter →

What does "36 ksi steel" mean?

36 ksi = yield strength of structural steel

A36 Steel (most common structural):

  • Yield strength: 36,000 PSI = 36 ksi = 248 MPa
  • Tensile strength: 58-80 ksi (ultimate strength before breaking)
  • Applications: Beams, columns, general construction

Yield strength: Stress at which permanent deformation begins Tensile strength: Maximum stress before failure

Common grades:

  • A36: 36 ksi (older standard, still common)
  • A572 Grade 50: 50 ksi (modern standard)
  • A992: 50 ksi yield (I-beams, wide flanges)

How do I convert ksi to PSI?

Formula: PSI = ksi × 1,000

Examples:

  • 1 ksi = 1,000 PSI
  • 36 ksi = 36,000 PSI (A36 steel)
  • 50 ksi = 50,000 PSI (A992 steel)
  • 4 ksi = 4,000 PSI (concrete)
  • 0.1 ksi = 100 PSI

Why use ksi?: Simpler than writing "36,000 PSI"—say "36 ksi" instead

What is typical concrete strength in ksi?

Residential/Light commercial:

  • Sidewalks, patios: 3 ksi (3,000 PSI)
  • Garage floors, driveways: 3.5-4 ksi
  • Foundation slabs: 3-4 ksi

Commercial:

  • Commercial floors: 4-5 ksi
  • Parking structures: 4-5 ksi
  • Warehouse slabs: 5-6 ksi

Structural:

  • Columns, beams: 5-8 ksi
  • High-rise buildings: 8-14 ksi
  • Bridge elements: 4-6 ksi

Special:

  • Precast prestressed: 5-10 ksi
  • Ultra-high performance: 20-30 ksi

Note: Concrete strength measured at 28 days after pouring

Why does US use ksi instead of MPa?

Historical: US construction industry established with imperial units Standards: AISC, ACI, ASTM all specify ksi Training: US engineers educated with ksi Continuity: Existing specs, calculations, tables in ksi Conversion: 1 ksi ≈ 7 MPa (approximate, easy mental math)

Rest of world: Uses MPa (SI standard)

  • 36 ksi = 248 MPa (A36 steel equivalent)
  • 50 ksi = 345 MPa (common grade)

Dual labeling: International projects often show both units

Conversion Table: Atmosphere to Kilopound per Square Inch

Atmosphere (atm)Kilopound per Square Inch (ksi)
0.50.007
10.015
1.50.022
20.029
50.074
100.147
250.367
500.735
1001.47
2503.674
5007.348
1,00014.696

People Also Ask

How do I convert Atmosphere to Kilopound per Square Inch?

To convert Atmosphere to Kilopound per Square Inch, enter the value in Atmosphere in the calculator above. The conversion will happen automatically. Use our free online converter for instant and accurate results. You can also visit our pressure converter page to convert between other units in this category.

Learn more →

What is the conversion factor from Atmosphere to Kilopound per Square Inch?

The conversion factor depends on the specific relationship between Atmosphere and Kilopound per Square Inch. 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 Kilopound per Square Inch back to Atmosphere?

Yes! You can easily convert Kilopound per Square Inch back to Atmosphere by using the swap button (⇌) in the calculator above, or by visiting our Kilopound per Square Inch to Atmosphere converter page. You can also explore other pressure conversions on our category page.

Learn more →

What are common uses for Atmosphere and Kilopound per Square Inch?

Atmosphere and Kilopound per Square Inch are both standard units used in pressure measurements. They are commonly used in various applications including engineering, construction, cooking, and scientific research. Browse our pressure converter for more conversion options.

For more pressure conversion questions, visit our FAQ page or explore our conversion guides.

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All Pressure Conversions

Pascal to KilopascalPascal to MegapascalPascal to HectopascalPascal to BarPascal to MillibarPascal to AtmospherePascal to Technical AtmospherePascal to TorrPascal to Millimeter of MercuryPascal to Inch of MercuryPascal to Pound per Square InchPascal to Kilopound per Square InchPascal to Kilogram-force per Square CentimeterPascal to Kilogram-force per Square MeterPascal to Millimeter of Water ColumnPascal to Inch of Water ColumnKilopascal to PascalKilopascal to MegapascalKilopascal to HectopascalKilopascal to BarKilopascal to MillibarKilopascal to AtmosphereKilopascal to Technical AtmosphereKilopascal to TorrKilopascal to Millimeter of MercuryKilopascal to Inch of MercuryKilopascal to Pound per Square InchKilopascal to Kilopound per Square InchKilopascal to Kilogram-force per Square CentimeterKilopascal to Kilogram-force per Square MeterKilopascal to Millimeter of Water ColumnKilopascal to Inch of Water ColumnMegapascal to PascalMegapascal to KilopascalMegapascal to HectopascalMegapascal to BarMegapascal to MillibarMegapascal to AtmosphereMegapascal to Technical AtmosphereMegapascal to TorrMegapascal to Millimeter of MercuryMegapascal to Inch of MercuryMegapascal to Pound per Square InchMegapascal to Kilopound per Square InchMegapascal to Kilogram-force per Square CentimeterMegapascal to Kilogram-force per Square MeterMegapascal to Millimeter of Water ColumnMegapascal to Inch of Water ColumnHectopascal to PascalHectopascal to KilopascalHectopascal to MegapascalHectopascal to BarHectopascal to MillibarHectopascal to AtmosphereHectopascal to Technical AtmosphereHectopascal to TorrHectopascal to Millimeter of MercuryHectopascal to Inch of MercuryHectopascal to Pound per Square InchHectopascal to Kilopound per Square InchHectopascal to Kilogram-force per Square CentimeterHectopascal to Kilogram-force per Square MeterHectopascal to Millimeter of Water ColumnHectopascal to Inch of Water ColumnBar to PascalBar to KilopascalBar to MegapascalBar to HectopascalBar to MillibarBar to AtmosphereBar to Technical AtmosphereBar to TorrBar to Millimeter of MercuryBar to Inch of MercuryBar to Pound per Square InchBar to Kilopound per Square InchBar to Kilogram-force per Square CentimeterBar to Kilogram-force per Square MeterBar to Millimeter of Water ColumnBar to Inch of Water ColumnMillibar to PascalMillibar to KilopascalMillibar to MegapascalMillibar to HectopascalMillibar to BarMillibar to AtmosphereMillibar to Technical AtmosphereMillibar to TorrMillibar to Millimeter of MercuryMillibar to Inch of MercuryMillibar to Pound per Square InchMillibar to Kilopound per Square InchMillibar to Kilogram-force per Square CentimeterMillibar to Kilogram-force per Square MeterMillibar to Millimeter of Water ColumnMillibar to Inch of Water ColumnAtmosphere to PascalAtmosphere to KilopascalAtmosphere to MegapascalAtmosphere to HectopascalAtmosphere to BarAtmosphere to MillibarAtmosphere to Technical AtmosphereAtmosphere to TorrAtmosphere to Millimeter of MercuryAtmosphere to Inch of MercuryAtmosphere to Pound per Square InchAtmosphere to Kilogram-force per Square CentimeterAtmosphere to Kilogram-force per Square MeterAtmosphere to Millimeter of Water ColumnAtmosphere to Inch of Water ColumnTechnical Atmosphere to PascalTechnical Atmosphere to KilopascalTechnical Atmosphere to MegapascalTechnical Atmosphere to HectopascalTechnical Atmosphere to BarTechnical Atmosphere to MillibarTechnical Atmosphere to AtmosphereTechnical Atmosphere to TorrTechnical Atmosphere to Millimeter of Mercury

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Verified Against Authority Standards

All conversion formulas have been verified against international standards and authoritative sources to ensure maximum accuracy and reliability.

NIST Reference on Constants, Units and Uncertainty

National Institute of Standards and Technology — Fundamental physical constants and unit conversions

BIPM SI Units

Bureau International des Poids et Mesures — International System of Units (SI) definitions and standards

ISO 80000

International Organization for Standardization — Quantities and units international standards series

Last verified: February 19, 2026