Convert Pound per square inch to Kilopascal
1 pound per square inch = 6.894757 kilopascal (kPa). For example, 10 pound per square inch = 68.94757 kilopascal and 100 pound per square inch = 689.4757 kilopascal. Type any value below to convert pound per square inch to kilopascal both ways — it runs entirely in your browser.
Quick answer: Pound per square inch to Kilopascal
1 Pound per square inch = 6.894757 Kilopascal (psi → kPa). To convert pound per square inch to kilopascal, multiply by 6.894757. To convert kilopascal to pound per square inch, multiply by 0.1450377. 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 pound per square inch-to-kilopascal questions.
How to convert Pound per square inch to Kilopascal
To convert pound per square inch to kilopascal, multiply the number of pound per square inch by the conversion factor 6.894757, because 1 psi = 6.894757 kPa. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 kPa = 0.1450377 psi, so you divide by 6.894757 (or multiply by 0.1450377) to turn kilopascal back into pound per square inch.
kPa = psi × 6.894757 ·
psi = kPa × 0.1450377
- Write down the value you want to convert, in pound per square inch.
- Multiply it by 6.894757.
- The result is the same area/length/quantity expressed in kilopascal.
Pound per square inch to Kilopascal — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 pound per square inch is 34.47379 kilopascal because 5 psi × 6.894757 = 34.47379 kPa.
| Pound per square inch | Calculation | Kilopascal |
|---|---|---|
| 1 psi | 1 psi × 6.894757 = 6.894757 kPa | 6.894757 kPa |
| 2 psi | 2 psi × 6.894757 = 13.78951 kPa | 13.78951 kPa |
| 3 psi | 3 psi × 6.894757 = 20.68427 kPa | 20.68427 kPa |
| 5 psi | 5 psi × 6.894757 = 34.47379 kPa | 34.47379 kPa |
| 7 psi | 7 psi × 6.894757 = 48.2633 kPa | 48.2633 kPa |
| 10 psi | 10 psi × 6.894757 = 68.94757 kPa | 68.94757 kPa |
| 12 psi | 12 psi × 6.894757 = 82.73709 kPa | 82.73709 kPa |
| 15 psi | 15 psi × 6.894757 = 103.4214 kPa | 103.4214 kPa |
| 20 psi | 20 psi × 6.894757 = 137.8951 kPa | 137.8951 kPa |
| 25 psi | 25 psi × 6.894757 = 172.3689 kPa | 172.3689 kPa |
| 50 psi | 50 psi × 6.894757 = 344.7379 kPa | 344.7379 kPa |
| 100 psi | 100 psi × 6.894757 = 689.4757 kPa | 689.4757 kPa |
Common Pound per square inch to Kilopascal conversions
These are the pound per square inch-to-kilopascal values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 pound per square inch = 6.894757 kilopascal
- 2 pound per square inch = 13.78951 kilopascal
- 2.5 pound per square inch = 17.23689 kilopascal
- 3 pound per square inch = 20.68427 kilopascal
- 4 pound per square inch = 27.57903 kilopascal
- 5 pound per square inch = 34.47379 kilopascal
- 6 pound per square inch = 41.36854 kilopascal
- 7 pound per square inch = 48.2633 kilopascal
- 8 pound per square inch = 55.15806 kilopascal
- 9 pound per square inch = 62.05282 kilopascal
- 10 pound per square inch = 68.94757 kilopascal
- 12 pound per square inch = 82.73709 kilopascal
- 15 pound per square inch = 103.4214 kilopascal
- 20 pound per square inch = 137.8951 kilopascal
- 25 pound per square inch = 172.3689 kilopascal
- 30 pound per square inch = 206.8427 kilopascal
- 50 pound per square inch = 344.7379 kilopascal
- 75 pound per square inch = 517.1068 kilopascal
- 100 pound per square inch = 689.4757 kilopascal
- 200 pound per square inch = 1,378.951 kilopascal
- 500 pound per square inch = 3,447.379 kilopascal
- 1000 pound per square inch = 6,894.757 kilopascal
Pound per square inch to Kilopascal conversion chart (both directions)
The chart below converts pound per square inch to kilopascal and kilopascal to pound per square inch side by side, so it works whichever way you need. 1 pound per square inch = 6.894757 kilopascal, and 1 kilopascal = 0.1450377 pound per square inch.
| Pound per square inch → Kilopascal | Kilopascal → Pound per square inch |
|---|---|
| 0.25 psi = 1.723689 kPa | 0.25 kPa = 0.03625943 psi |
| 0.5 psi = 3.447379 kPa | 0.5 kPa = 0.07251887 psi |
| 1 psi = 6.894757 kPa | 1 kPa = 0.1450377 psi |
| 2 psi = 13.78951 kPa | 2 kPa = 0.2900755 psi |
| 3 psi = 20.68427 kPa | 3 kPa = 0.4351132 psi |
| 4 psi = 27.57903 kPa | 4 kPa = 0.580151 psi |
| 5 psi = 34.47379 kPa | 5 kPa = 0.7251887 psi |
| 6 psi = 41.36854 kPa | 6 kPa = 0.8702264 psi |
| 7 psi = 48.2633 kPa | 7 kPa = 1.015264 psi |
| 8 psi = 55.15806 kPa | 8 kPa = 1.160302 psi |
| 9 psi = 62.05282 kPa | 9 kPa = 1.30534 psi |
| 10 psi = 68.94757 kPa | 10 kPa = 1.450377 psi |
| 12 psi = 82.73709 kPa | 12 kPa = 1.740453 psi |
| 15 psi = 103.4214 kPa | 15 kPa = 2.175566 psi |
| 20 psi = 137.8951 kPa | 20 kPa = 2.900755 psi |
| 25 psi = 172.3689 kPa | 25 kPa = 3.625943 psi |
| 30 psi = 206.8427 kPa | 30 kPa = 4.351132 psi |
| 40 psi = 275.7903 kPa | 40 kPa = 5.80151 psi |
| 50 psi = 344.7379 kPa | 50 kPa = 7.251887 psi |
| 75 psi = 517.1068 kPa | 75 kPa = 10.87783 psi |
| 100 psi = 689.4757 kPa | 100 kPa = 14.50377 psi |
| 150 psi = 1,034.214 kPa | 150 kPa = 21.75566 psi |
| 200 psi = 1,378.951 kPa | 200 kPa = 29.00755 psi |
| 250 psi = 1,723.689 kPa | 250 kPa = 36.25943 psi |
| 500 psi = 3,447.379 kPa | 500 kPa = 72.51887 psi |
| 1000 psi = 6,894.757 kPa | 1000 kPa = 145.0377 psi |
Pound per square inch vs Kilopascal: 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 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 — 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 — the amount above surrounding air — which is why a flat tyre reads zero rather than about 14.7.
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 — which is a useful mental shortcut, though the exact figure is 101.325 kPa, not 100.
Convert 1 Pound per square inch to other units
It can help to see a pound per square inch next to the other units it is commonly compared with. 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 mmH₂O | Millimetre of water |
| 27.6799 inH₂O | Inch of water |
| 0.07030696 kgf/cm² | Kilogram-force per square centimetre |
Convert 1 Kilopascal to other units
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 mmH₂O | Millimetre of water |
| 4.014631 inH₂O | Inch of water |
| 0.1450377 psi | Pound per square inch |
| 0.01019716 kgf/cm² | Kilogram-force per square centimetre |
Tips for converting Pound per square inch to Kilopascal
- To go from pound per square inch to kilopascal, multiply by 6.894757; to go back, divide by 6.894757 (or multiply by 0.1450377).
- For a quick mental estimate, remember that 1 pound per square inch ≈ 6.894757 kilopascal, so 10 pound per square inch ≈ 68.94757 kilopascal.
- 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 — change either side to convert in that direction.
How to use this Pound per square inch to Kilopascal converter
Type a number into the Pound per square inch field and the equivalent in Kilopascal appears instantly — there is no “convert” 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 Kilopascal field to convert the other way (kilopascal to pound per square inch). 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 — use the chart for quick look-ups and the tool for precise work.
Accuracy and method
Every figure on this page — the formula, the worked examples, the conversion chart and the “convert to other units” tables — is computed from a single verified conversion factor (1 psi = 6.894757 kPa), never copied from a hand-typed lookup table that could drift. That factor is derived from each unit’s definition in terms of a common base unit, and an automated check re-verifies all of the site’s factors on every update, so the numbers here stay correct over time. This matters for pound per square inch-to-kilopascal 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 — Guide for the Use of the SI — 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/s² — so psi, inches of mercury and inches of water are defined exactly rather than measured.
- BIPM — The International System of Units (SI Brochure) — 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 — psi and the torr — 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 kilopascal are in 1 pound per square inch?
- 1 pound per square inch = 6.894757 kilopascal (kPa). To convert any number of pound per square inch to kilopascal, multiply by 6.894757.
- How do I convert pound per square inch to kilopascal?
- Multiply the number of pound per square inch by 6.894757. For example, 10 pound per square inch = 10 × 6.894757 = 68.94757 kilopascal, and 25 pound per square inch = 172.3689 kilopascal.
- How many pound per square inch are in 1 kilopascal?
- 1 kilopascal = 0.1450377 pound per square inch. So to convert kilopascal back to pound per square inch, multiply by 0.1450377.
- What is the formula to convert pound per square inch to kilopascal?
- kilopascal = pound per square inch × 6.894757. The reverse formula is pound per square inch = kilopascal × 0.1450377.
- How much is 100 pound per square inch in kilopascal?
- 100 pound per square inch = 689.4757 kilopascal. (And 1000 pound per square inch = 6,894.757 kilopascal.)
- Which is bigger, a pound per square inch or a kilopascal?
- A pound per square inch is larger: 1 pound per square inch = 6.894757 kilopascal.
- Is this pound per square inch to kilopascal converter accurate?
- Yes — every value is computed from the exact 6.894757 kPa per psi factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert kilopascal to pound per square inch too?
- Yes. The converter works both ways — enter a value in either field. 1 kilopascal = 0.1450377 pound per square inch.