Kilopascal to Torr Converter
Convert kilopascals to torr with our free online pressure converter.
Quick Answer
1 Kilopascal = 7.500617 torr
Formula: Kilopascal × conversion factor = Torr
Use the calculator below for instant, accurate conversions.
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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.
Kilopascal to Torr Calculator
How to Use the Kilopascal to Torr Calculator:
- Enter the value you want to convert in the 'From' field (Kilopascal).
- The converted value in Torr will appear automatically in the 'To' field.
- Use the dropdown menus to select different units within the Pressure category.
- Click the swap button (⇌) to reverse the conversion direction.
How to Convert Kilopascal to Torr: Step-by-Step Guide
Converting Kilopascal to Torr involves multiplying the value by a specific conversion factor, as shown in the formula below.
Formula:
Torr = kPa × 7.50062Example Calculation:
1 kPa = 7.500617 Torr
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.
Need to convert to other pressure units?
View all Pressure conversions →What is a Kilopascal and a Torr?
1 kPa = 1,000 Pa = 0.145038 PSI = 0.01 bar = 10 hPa = 10 mbar = 0.00987 atm = 7.5 mmHg
Why Kilopascal?
The kilopascal is the practical SI unit for everyday pressures:
- Pascal is too small: 1 Pa = fingernail scratch pressure (not useful)
- Megapascal is too large: 1 MPa = industrial level (uncommon for most uses)
- Kilopascal is "just right": 100-300 kPa range covers most everyday pressures
- SI standard: International standard for tire pressure, medical, engineering
- Clean conversions: Exactly 0.145 PSI, exactly 0.01 bar
The Torr (symbol: Torr) is a unit of pressure based on an absolute scale. It is not an SI unit, but it is widely used in science and engineering.
The Modern Definition: 1 Torr is defined as exactly 1/760 of a standard atmosphere (1 atm).
Since a standard atmosphere is defined as exactly 101,325 Pascals (Pa), the exact value of one Torr is: 1 Torr = 101,325 / 760 Pascals ≈ 133.322368421 Pascals.
** Torr vs. mmHg**: Historically, the Torr was intended to be same as the millimeter of mercury (mmHg). However, because the density of mercury changes with temperature and local gravity varies across the Earth, the mmHg is not a "true" absolute unit. To solve this, the Torr was redefined as a fixed fraction of an atmosphere, making it a perfectly stable unit regardless of where or the temperature at which you measure it.
Key standard relationships:
- 1 Torr = 1,000 milliTorr (mTorr)
- 760 Torr = 1 standard atmosphere (atm)
- 1 Torr ≈ 1.333 millibars (mbar)
- 1 Torr ≈ 0.0193 PSI (pounds per square inch)
Note: The Kilopascal is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Torr belongs to the imperial/US customary system.
History of the Kilopascal and Torr
: From the First Barometer to Modern Vacuums
The history of the Torr is the history of our understanding of the "void" and the air around us.
1. Evangelista Torricelli and the "Sea of Air" (1643)
Before the 1640s, scientists believed that "nature abhors a vacuum" and that space was always filled with something. Evangelista Torricelli, a student of Galileo, challenged this. He filled a glass tube with mercury and inverted it into a bowl. Instead of all the mercury flowing out, it stopped at a height of about 76 cm (760 mm).
Torricelli correctly deduced that it wasn't a "pull" from the vacuum at the top of the tube, but the weight of the atmosphere pushing down on the mercury in the bowl that held the liquid up. He famously stated: "We live submerged at the bottom of an ocean of elementary air."
2. The Birth of the Name (1913)
For centuries, pressure was simply measured in "inches of mercury" or "millimeters of mercury." In 1913, the unit was formally named the Torr to honor Torricelli.
3. The Great Redefinition (1954)
As science became more precise, the variance in mercury density became a problem (a "millimeter of mercury" in the Arctic was technically different from one at the Equator). In 1954, at the 10th General Conference on Weights and Measures, the Standard Atmosphere was fixed at exactly 101,325 Pascals. Consequently, the Torr was redefined as exactly 1/760 of that value, decoupling it from the physical properties of mercury forever.
Common Uses and Applications: kilopascals vs torr
Explore the typical applications for both Kilopascal (imperial/US) and Torr (imperial/US) to understand their common contexts.
Common Uses for kilopascals
Automotive: Tire pressure (international standard, except USA).
- Car manufacturers specify tire pressure in kPa on door jamb
- Repair manuals use kPa
- Tire pressure gauges often have kPa scale
Medical: Blood pressure equipment (replacing mmHg in some regions).
- Modern digital blood pressure monitors often display kPa
- Medical research uses kPa
- Gradual transition from mmHg (some regions still use mmHg)
Meteorology: Atmospheric pressure (101.325 kPa at sea level).
- European weather reports sometimes use kPa
- Upper atmosphere measurements in kPa
- Pressure profiling in meteorology
Engineering: Structural loads, material strength, HVAC systems.
- Material testing: tensile strength in MPa, stress in kPa
- Building code pressure ratings in kPa
- Water system specifications in kPa
When to Use torr
Additional Unit Information
About Kilopascal (kPa)
How do I convert kPa to PSI?
Formula: PSI = kPa × 0.145038 (or kPa ÷ 6.895)
Examples:
- 100 kPa = 14.5 PSI
- 200 kPa = 29 PSI (bicycle tire)
- 220 kPa = 32 PSI (typical car tire)
- 240 kPa = 35 PSI (SUV tire)
- 600 kPa = 87 PSI (road bike)
What is 32 PSI in kPa?
32 PSI = 220.6 kPa (standard car tire pressure)
Common tire pressures:
- 30 PSI = 207 kPa
- 32 PSI = 221 kPa (most common)
- 35 PSI = 241 kPa (SUVs, loaded vehicles)
- 40 PSI = 276 kPa (trucks, some SUVs)
How many kPa in 1 bar?
1 bar = 100 kPa exactly
Examples:
- 0.5 bar = 50 kPa
- 1 bar = 100 kPa
- 2 bar = 200 kPa (bicycle tire)
- 2.5 bar = 250 kPa (car tire)
- 10 bar = 1,000 kPa = 1 MPa
Why do some countries use kPa and others PSI for tires?
kPa (kilopascal): International standard (SI unit)
- Used in: Europe, Asia, Australia, Canada, most of world
- Metric system, easier calculations
- Appears on all tire sidewalls globally
PSI (pounds per square inch): US customary unit
- Used in: United States primarily
- Imperial system, traditional in US
- Also appears on tire sidewalls
Dual labeling: Modern tires show both (e.g., "32 PSI / 220 kPa")
Conversion tip: Multiply kPa by 0.145 to get PSI, or divide PSI by 6.895 to get kPa
Is kPa replacing mmHg for blood pressure?
Transitioning, but slow:
mmHg still dominant: Most medical equipment, patient communication uses mmHg kPa in some regions: SI-compliant medical devices show kPa Dual display: Many modern BP monitors show both
Why slow transition?:
- Historical familiarity (120/80 mmHg)
- Medical education based on mmHg
- Patient understanding
- International guidelines still use mmHg
Conversion: 1 kPa ≈ 7.5 mmHg, so 120/80 mmHg = 16/10.7 kPa (less intuitive)
About Torr (Torr)
What is the difference between Torr and mmHg?
For almost all practical, medical, and industrial purposes, they are the same. However, scientifically:
- Torr is defined as exactly 1/760 of a Standard Atmosphere (Standardized in 1954).
- mmHg (millimeter of mercury) is based on the actual weight of liquid mercury, which changes slightly depending on gravity and temperature.
- The difference is 1 part in 7 million. Unless you are building a particle accelerator, you can treat them as identical.
Why is Torr used in vacuum technology?
Torr is the preferred unit because most vacuum systems are based on pumping down from atmospheric pressure. Since 760 Torr is a standard atmosphere, it's very easy for an engineer to know how "far" they have to go. It also uses a logarithmic scale naturally, making it easy to talk about 10⁻⁶ or 10⁻⁹ Torr levels.
Is a Torr a "Metric" unit?
No. The official SI unit for pressure is the Pascal (Pa). However, because 1 Pascal is such a small amount of pressure (about the weight of a dollar bill on a table), scientists in specific fields prefer the Torr for convenience.
How do you convert Torr to PSI?
Multiply your Torr value by 0.0193368. Formula: PSI = Torr × 0.0193368 Example: 100 Torr ≈ 1.93 PSI.
What is a "milliTorr" (mTorr)?
Also known as a Micron, a milliTorr is 1/1,000th of a Torr. It is commonly used in "roughing" vacuum pumps (like the one in your school's physics lab or a high-end food sealer).
Is 0 Torr possible?
A "perfect" vacuum (exactly 0 Torr) is theoretically impossible according to quantum mechanics. Even in deep intergalactic space, there is a pressure of about 10⁻¹⁷ Torr due to a few stray hydrogen atoms and cosmic radiation.
Is Torr used in the medical field?
Yes, but doctors almost always call it mmHg. When a nurse says your blood pressure is "120 over 80," they are literally saying "120 Torr systolic and 80 Torr diastolic."
Who is the unit Torr named after?
It is named after Evangelista Torricelli, the Italian physicist who proved that air has weight and invented the mercury barometer in 1643.
How many Pascals are in a Torr?
Exactly 133.322368... Pascals. For most calculations, using 133.3 is sufficient.
What happens if you are exposed to 0 Torr?
This is "space vacuum." Contrary to movies, your head doesn't explode. However, the oxygen in your blood would diffuse out of your lungs into the vacuum, causing you to lose consciousness in about 15 seconds. Your skin is tough enough to hold "you" together, but you would swell up significantly as water in your tissues starts to turn to gas.
Conversion Table: Kilopascal to Torr
| Kilopascal (kPa) | Torr (Torr) |
|---|---|
| 0.5 | 3.75 |
| 1 | 7.501 |
| 1.5 | 11.251 |
| 2 | 15.001 |
| 5 | 37.503 |
| 10 | 75.006 |
| 25 | 187.515 |
| 50 | 375.031 |
| 100 | 750.062 |
| 250 | 1,875.154 |
| 500 | 3,750.308 |
| 1,000 | 7,500.617 |
People Also Ask
How do I convert Kilopascal to Torr?
To convert Kilopascal to Torr, enter the value in Kilopascal 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 Kilopascal to Torr?
The conversion factor depends on the specific relationship between Kilopascal and Torr. 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 Torr back to Kilopascal?
Yes! You can easily convert Torr back to Kilopascal by using the swap button (⇌) in the calculator above, or by visiting our Torr to Kilopascal converter page. You can also explore other pressure conversions on our category page.
Learn more →What are common uses for Kilopascal and Torr?
Kilopascal and Torr 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.
Helpful Conversion Guides
Learn more about unit conversion with our comprehensive guides:
📚 How to Convert Units
Step-by-step guide to unit conversion with practical examples.
🔢 Conversion Formulas
Essential formulas for pressure and other conversions.
⚖️ Metric vs Imperial
Understand the differences between measurement systems.
⚠️ Common Mistakes
Learn about frequent errors and how to avoid them.
All Pressure Conversions
Other Pressure Units and Conversions
Explore other pressure units and their conversion options:
- Pascal (Pa) • Kilopascal to Pascal
- Megapascal (MPa) • Kilopascal to Megapascal
- Hectopascal (hPa) • Kilopascal to Hectopascal
- Bar (bar) • Kilopascal to Bar
- Millibar (mbar) • Kilopascal to Millibar
- Atmosphere (atm) • Kilopascal to Atmosphere
- Technical Atmosphere (at) • Kilopascal to Technical Atmosphere
- Millimeter of Mercury (mmHg) • Kilopascal to Millimeter of Mercury
- Inch of Mercury (inHg) • Kilopascal to Inch of Mercury
- Pound per Square Inch (psi) • Kilopascal to Pound per Square Inch
Verified Against Authority Standards
All conversion formulas have been verified against international standards and authoritative sources to ensure maximum accuracy and reliability.
National Institute of Standards and Technology — Fundamental physical constants and unit conversions
Bureau International des Poids et Mesures — International System of Units (SI) definitions and standards
International Organization for Standardization — Quantities and units international standards series
Last verified: February 19, 2026