Convert Kilopascal to Pound per square inch
1 kilopascal = 0.1450377 pound per square inch (psi). For example, 10 kilopascal = 1.450377 pound per square inch and 100 kilopascal = 14.50377 pound per square inch. Type any value below to convert kilopascal to pound per square inch both ways β it runs entirely in your browser.
Quick answer: Kilopascal to Pound per square inch
1 Kilopascal = 0.1450377 Pound per square inch (kPa β psi). To convert kilopascal to pound per square inch, multiply by 0.1450377. To convert pound per square inch to kilopascal, multiply by 6.894757. The converter at the top does this instantly and both ways; the sections below give the formula, worked examples, a full conversion chart and answers to the most common kilopascal-to-pound per square inch questions.
How to convert Kilopascal to Pound per square inch
To convert kilopascal to pound per square inch, multiply the number of kilopascal by the conversion factor 0.1450377, because 1 kPa = 0.1450377 psi. The conversion is linear, so the same factor works for any value β whole numbers, decimals or fractions. For the reverse direction, 1 psi = 6.894757 kPa, so you divide by 0.1450377 (or multiply by 6.894757) to turn pound per square inch back into kilopascal.
psi = kPa Γ 0.1450377 Β·
kPa = psi Γ 6.894757
- Write down the value you want to convert, in kilopascal.
- Multiply it by 0.1450377.
- The result is the same area/length/quantity expressed in pound per square inch.
Kilopascal to Pound per square inch β worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 kilopascal is 0.7251887 pound per square inch because 5 kPa Γ 0.1450377 = 0.7251887 psi.
| Kilopascal | Calculation | Pound per square inch |
|---|---|---|
| 1 kPa | 1 kPa Γ 0.1450377 = 0.1450377 psi | 0.1450377 psi |
| 2 kPa | 2 kPa Γ 0.1450377 = 0.2900755 psi | 0.2900755 psi |
| 3 kPa | 3 kPa Γ 0.1450377 = 0.4351132 psi | 0.4351132 psi |
| 5 kPa | 5 kPa Γ 0.1450377 = 0.7251887 psi | 0.7251887 psi |
| 7 kPa | 7 kPa Γ 0.1450377 = 1.015264 psi | 1.015264 psi |
| 10 kPa | 10 kPa Γ 0.1450377 = 1.450377 psi | 1.450377 psi |
| 12 kPa | 12 kPa Γ 0.1450377 = 1.740453 psi | 1.740453 psi |
| 15 kPa | 15 kPa Γ 0.1450377 = 2.175566 psi | 2.175566 psi |
| 20 kPa | 20 kPa Γ 0.1450377 = 2.900755 psi | 2.900755 psi |
| 25 kPa | 25 kPa Γ 0.1450377 = 3.625943 psi | 3.625943 psi |
| 50 kPa | 50 kPa Γ 0.1450377 = 7.251887 psi | 7.251887 psi |
| 100 kPa | 100 kPa Γ 0.1450377 = 14.50377 psi | 14.50377 psi |
Common Kilopascal to Pound per square inch conversions
These are the kilopascal-to-pound per square inch values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 kilopascal = 0.1450377 pound per square inch
- 2 kilopascal = 0.2900755 pound per square inch
- 2.5 kilopascal = 0.3625943 pound per square inch
- 3 kilopascal = 0.4351132 pound per square inch
- 4 kilopascal = 0.580151 pound per square inch
- 5 kilopascal = 0.7251887 pound per square inch
- 6 kilopascal = 0.8702264 pound per square inch
- 7 kilopascal = 1.015264 pound per square inch
- 8 kilopascal = 1.160302 pound per square inch
- 9 kilopascal = 1.30534 pound per square inch
- 10 kilopascal = 1.450377 pound per square inch
- 12 kilopascal = 1.740453 pound per square inch
- 15 kilopascal = 2.175566 pound per square inch
- 20 kilopascal = 2.900755 pound per square inch
- 25 kilopascal = 3.625943 pound per square inch
- 30 kilopascal = 4.351132 pound per square inch
- 50 kilopascal = 7.251887 pound per square inch
- 75 kilopascal = 10.87783 pound per square inch
- 100 kilopascal = 14.50377 pound per square inch
- 200 kilopascal = 29.00755 pound per square inch
- 500 kilopascal = 72.51887 pound per square inch
- 1000 kilopascal = 145.0377 pound per square inch
Kilopascal to Pound per square inch conversion chart (both directions)
The chart below converts kilopascal to pound per square inch and pound per square inch to kilopascal side by side, so it works whichever way you need. 1 kilopascal = 0.1450377 pound per square inch, and 1 pound per square inch = 6.894757 kilopascal.
| Kilopascal β Pound per square inch | Pound per square inch β Kilopascal |
|---|---|
| 0.25 kPa = 0.03625943 psi | 0.25 psi = 1.723689 kPa |
| 0.5 kPa = 0.07251887 psi | 0.5 psi = 3.447379 kPa |
| 1 kPa = 0.1450377 psi | 1 psi = 6.894757 kPa |
| 2 kPa = 0.2900755 psi | 2 psi = 13.78951 kPa |
| 3 kPa = 0.4351132 psi | 3 psi = 20.68427 kPa |
| 4 kPa = 0.580151 psi | 4 psi = 27.57903 kPa |
| 5 kPa = 0.7251887 psi | 5 psi = 34.47379 kPa |
| 6 kPa = 0.8702264 psi | 6 psi = 41.36854 kPa |
| 7 kPa = 1.015264 psi | 7 psi = 48.2633 kPa |
| 8 kPa = 1.160302 psi | 8 psi = 55.15806 kPa |
| 9 kPa = 1.30534 psi | 9 psi = 62.05282 kPa |
| 10 kPa = 1.450377 psi | 10 psi = 68.94757 kPa |
| 12 kPa = 1.740453 psi | 12 psi = 82.73709 kPa |
| 15 kPa = 2.175566 psi | 15 psi = 103.4214 kPa |
| 20 kPa = 2.900755 psi | 20 psi = 137.8951 kPa |
| 25 kPa = 3.625943 psi | 25 psi = 172.3689 kPa |
| 30 kPa = 4.351132 psi | 30 psi = 206.8427 kPa |
| 40 kPa = 5.80151 psi | 40 psi = 275.7903 kPa |
| 50 kPa = 7.251887 psi | 50 psi = 344.7379 kPa |
| 75 kPa = 10.87783 psi | 75 psi = 517.1068 kPa |
| 100 kPa = 14.50377 psi | 100 psi = 689.4757 kPa |
| 150 kPa = 21.75566 psi | 150 psi = 1,034.214 kPa |
| 200 kPa = 29.00755 psi | 200 psi = 1,378.951 kPa |
| 250 kPa = 36.25943 psi | 250 psi = 1,723.689 kPa |
| 500 kPa = 72.51887 psi | 500 psi = 3,447.379 kPa |
| 1000 kPa = 145.0377 psi | 1000 psi = 6,894.757 kPa |
Kilopascal vs Pound per square inch: which is bigger?
A pound per square inch is the larger unit: one pound per square inch equals 6.894757 kilopascals. Put another way, you need 6.894757 kilopascals to make a single pound per square inch.
What is a Kilopascal? History, origin and usage
The kilopascal came into general use as countries converted their engineering standards to SI through the 1970s and 1980s. Canada, Australia and much of Europe moved tyre-pressure labels and gas-cylinder markings to kPa in that period, which is why a car built for one market often carries a door sticker in kPa and one built for another carries the same number in psi or bar.
Kilopascals are the workaday metric pressure unit: tyre pressures, medical gas supplies, water systems, ventilation and most mechanical engineering specifications. A car tyre is typically inflated to somewhere around 200 to 250 kPa.
One kilopascal is 1,000 pascals, and 100 kilopascals is very nearly one atmosphere β which is a useful mental shortcut, though the exact figure is 101.325 kPa, not 100.
What is a Pound per square inch? History, origin and usage
Pounds per square inch grew directly out of the steam age: boiler safety valves were rated by how many pounds of weight it took to hold them shut over a known area, and the unit survived into every later technology that Britain and the United States industrialised. It never went through a formal international definition of its own β instead it became exact in 1959, when the yard-and-pound agreement fixed the pound and the inch exactly, and again through the fixing of standard gravity, which pins down what a "pound of force" means.
Psi is the standard pressure unit in the United States and remains widely understood in Britain, India and elsewhere: tyre pressures, air compressors, pressure washers, water mains, hydraulic lines and scuba tanks. Car tyres are commonly inflated to around 30 to 35 psi.
Psi is exactly defined but its value in pascals is a decimal that repeats forever, so any written figure is necessarily rounded somewhere. Gauges usually read gauge pressure β the amount above surrounding air β which is why a flat tyre reads zero rather than about 14.7.
Convert 1 Kilopascal to other units
It can help to see a kilopascal next to the other units it is commonly compared with. One kilopascal (kPa) is equal to:
| 1 Kilopascal equals | Unit |
|---|---|
| 1,000 Pa | Pascal |
| 10 hPa | Hectopascal |
| 0.001 MPa | Megapascal |
| 10 mbar | Millibar |
| 0.01 bar | Bar |
| 0.009869233 atm | Standard atmosphere |
| 7.500617 Torr | Torr |
| 7.500616 mmHg | Millimetre of mercury |
| 0.2952998 inHg | Inch of mercury |
| 101.9716 mmHβO | Millimetre of water |
| 4.014631 inHβO | Inch of water |
| 0.1450377 psi | Pound per square inch |
| 0.01019716 kgf/cmΒ² | Kilogram-force per square centimetre |
Convert 1 Pound per square inch to other units
One pound per square inch (psi) is equal to:
| 1 Pound per square inch equals | Unit |
|---|---|
| 6,894.757 Pa | Pascal |
| 68.94757 hPa | Hectopascal |
| 6.894757 kPa | Kilopascal |
| 0.006894757 MPa | Megapascal |
| 68.94757 mbar | Millibar |
| 0.06894757 bar | Bar |
| 0.06804596 atm | Standard atmosphere |
| 51.71493 Torr | Torr |
| 51.71493 mmHg | Millimetre of mercury |
| 2.036021 inHg | Inch of mercury |
| 703.0696 mmHβO | Millimetre of water |
| 27.6799 inHβO | Inch of water |
| 0.07030696 kgf/cmΒ² | Kilogram-force per square centimetre |
Tips for converting Kilopascal to Pound per square inch
- To go from kilopascal to pound per square inch, multiply by 0.1450377; to go back, divide by 0.1450377 (or multiply by 6.894757).
- For a quick mental estimate, remember that 1 kilopascal β 0.1450377 pound per square inch, so 10 kilopascal β 1.450377 pound per square inch.
- The converter above keeps full precision; the tables round for readability, so use the tool for exact figures.
- Both fields update live as you type β change either side to convert in that direction.
How to use this Kilopascal to Pound per square inch converter
Type a number into the Kilopascal field and the equivalent in Pound per square inch appears instantly β there is no βconvertβ button to press and nothing is sent to a server, so it works offline once the page has loaded and is safe for any data. You can also type into the Pound per square inch field to convert the other way (pound per square inch to kilopascal). Use the swap control to flip the two units, and copy the result with a single click. Because the calculation runs in your browser with full floating-point precision, the converter is more exact than the rounded figures shown in the reference chart above β use the chart for quick look-ups and the tool for precise work.
Accuracy and method
Every figure on this page β the formula, the worked examples, the conversion chart and the βconvert to other unitsβ tables β is computed from a single verified conversion factor (1 kPa = 0.1450377 psi), never copied from a hand-typed lookup table that could drift. That factor is derived from each unitβs definition in terms of a common base unit, and an automated check re-verifies all of the siteβs factors on every update, so the numbers here stay correct over time. This matters for kilopascal-to-pound per square inch conversions because a small rounding error in a published table compounds quickly at larger quantities; computing from the exact factor avoids that.
Sources
- NIST Special Publication 811 β Guide for the Use of the SI β publishes the exact metric equivalents of the customary pressure units. A psi is one pound of force over one square inch, and the 1959 international yard-and-pound agreement fixes the pound at exactly 0.453 592 37 kilogram and the inch at exactly 0.0254 metre, while standard gravity is fixed at exactly 9.806 65 m/sΒ² β so psi, inches of mercury and inches of water are defined exactly rather than measured.
- BIPM β The International System of Units (SI Brochure) β the defining document for the SI, published by the International Bureau of Weights and Measures. It fixes the base unit that this conversion resolves to, which is why the factor here can be exact rather than approximate.
Pressure factors here come from fixed definitions, anchored to the pascal: a bar is exactly 100,000 Pa, one atmosphere is exactly 101,325 Pa, a torr is exactly a 760th of an atmosphere, and psi is built from the exact pound and the exact inch. Two of them β psi and the torr β work out to decimals that repeat forever, so where a number is shown rounded it is marked, not quietly trimmed.
Frequently asked questions
- How many pound per square inch are in 1 kilopascal?
- 1 kilopascal = 0.1450377 pound per square inch (psi). To convert any number of kilopascal to pound per square inch, multiply by 0.1450377.
- How do I convert kilopascal to pound per square inch?
- Multiply the number of kilopascal by 0.1450377. For example, 10 kilopascal = 10 Γ 0.1450377 = 1.450377 pound per square inch, and 25 kilopascal = 3.625943 pound per square inch.
- How many kilopascal are in 1 pound per square inch?
- 1 pound per square inch = 6.894757 kilopascal. So to convert pound per square inch back to kilopascal, multiply by 6.894757.
- What is the formula to convert kilopascal to pound per square inch?
- pound per square inch = kilopascal Γ 0.1450377. The reverse formula is kilopascal = pound per square inch Γ 6.894757.
- How much is 100 kilopascal in pound per square inch?
- 100 kilopascal = 14.50377 pound per square inch. (And 1000 kilopascal = 145.0377 pound per square inch.)
- Which is bigger, a kilopascal or a pound per square inch?
- A pound per square inch is larger: 1 pound per square inch = 6.894757 kilopascal.
- Is this kilopascal to pound per square inch converter accurate?
- Yes β every value is computed from the exact 0.1450377 psi per kPa factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert pound per square inch to kilopascal too?
- Yes. The converter works both ways β enter a value in either field. 1 pound per square inch = 6.894757 kilopascal.