Convert Pascal to Pound per square inch
1 pascal = 0.0001450377 pound per square inch (psi). For example, 10 pascal = 0.001450377 pound per square inch and 100 pascal = 0.01450377 pound per square inch. Type any value below to convert pascal to pound per square inch both ways — it runs entirely in your browser.
Quick answer: Pascal to Pound per square inch
1 Pascal = 0.0001450377 Pound per square inch (Pa → psi). To convert pascal to pound per square inch, multiply by 0.0001450377. To convert pound per square inch to pascal, multiply by 6,894.757. 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 pascal-to-pound per square inch questions.
How to convert Pascal to Pound per square inch
To convert pascal to pound per square inch, multiply the number of pascal by the conversion factor 0.0001450377, because 1 Pa = 0.0001450377 psi. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 psi = 6,894.757 Pa, so you divide by 0.0001450377 (or multiply by 6,894.757) to turn pound per square inch back into pascal.
psi = Pa × 0.0001450377 ·
Pa = psi × 6,894.757
- Write down the value you want to convert, in pascal.
- Multiply it by 0.0001450377.
- The result is the same area/length/quantity expressed in pound per square inch.
Pascal to Pound per square inch — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 pascal is 0.0007251887 pound per square inch because 5 Pa × 0.0001450377 = 0.0007251887 psi.
| Pascal | Calculation | Pound per square inch |
|---|---|---|
| 1 Pa | 1 Pa × 0.0001450377 = 0.0001450377 psi | 0.0001450377 psi |
| 2 Pa | 2 Pa × 0.0001450377 = 0.0002900755 psi | 0.0002900755 psi |
| 3 Pa | 3 Pa × 0.0001450377 = 0.0004351132 psi | 0.0004351132 psi |
| 5 Pa | 5 Pa × 0.0001450377 = 0.0007251887 psi | 0.0007251887 psi |
| 7 Pa | 7 Pa × 0.0001450377 = 0.001015264 psi | 0.001015264 psi |
| 10 Pa | 10 Pa × 0.0001450377 = 0.001450377 psi | 0.001450377 psi |
| 12 Pa | 12 Pa × 0.0001450377 = 0.001740453 psi | 0.001740453 psi |
| 15 Pa | 15 Pa × 0.0001450377 = 0.002175566 psi | 0.002175566 psi |
| 20 Pa | 20 Pa × 0.0001450377 = 0.002900755 psi | 0.002900755 psi |
| 25 Pa | 25 Pa × 0.0001450377 = 0.003625943 psi | 0.003625943 psi |
| 50 Pa | 50 Pa × 0.0001450377 = 0.007251887 psi | 0.007251887 psi |
| 100 Pa | 100 Pa × 0.0001450377 = 0.01450377 psi | 0.01450377 psi |
Common Pascal to Pound per square inch conversions
These are the pascal-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 pascal = 0.0001450377 pound per square inch
- 2 pascal = 0.0002900755 pound per square inch
- 2.5 pascal = 0.0003625943 pound per square inch
- 3 pascal = 0.0004351132 pound per square inch
- 4 pascal = 0.000580151 pound per square inch
- 5 pascal = 0.0007251887 pound per square inch
- 6 pascal = 0.0008702264 pound per square inch
- 7 pascal = 0.001015264 pound per square inch
- 8 pascal = 0.001160302 pound per square inch
- 9 pascal = 0.00130534 pound per square inch
- 10 pascal = 0.001450377 pound per square inch
- 12 pascal = 0.001740453 pound per square inch
- 15 pascal = 0.002175566 pound per square inch
- 20 pascal = 0.002900755 pound per square inch
- 25 pascal = 0.003625943 pound per square inch
- 30 pascal = 0.004351132 pound per square inch
- 50 pascal = 0.007251887 pound per square inch
- 75 pascal = 0.01087783 pound per square inch
- 100 pascal = 0.01450377 pound per square inch
- 200 pascal = 0.02900755 pound per square inch
- 500 pascal = 0.07251887 pound per square inch
- 1000 pascal = 0.1450377 pound per square inch
Pascal to Pound per square inch conversion chart (both directions)
The chart below converts pascal to pound per square inch and pound per square inch to pascal side by side, so it works whichever way you need. 1 pascal = 0.0001450377 pound per square inch, and 1 pound per square inch = 6,894.757 pascal.
| Pascal → Pound per square inch | Pound per square inch → Pascal |
|---|---|
| 0.25 Pa = 0.00003625943 psi | 0.25 psi = 1,723.689 Pa |
| 0.5 Pa = 0.00007251887 psi | 0.5 psi = 3,447.379 Pa |
| 1 Pa = 0.0001450377 psi | 1 psi = 6,894.757 Pa |
| 2 Pa = 0.0002900755 psi | 2 psi = 13,789.51 Pa |
| 3 Pa = 0.0004351132 psi | 3 psi = 20,684.27 Pa |
| 4 Pa = 0.000580151 psi | 4 psi = 27,579.03 Pa |
| 5 Pa = 0.0007251887 psi | 5 psi = 34,473.79 Pa |
| 6 Pa = 0.0008702264 psi | 6 psi = 41,368.54 Pa |
| 7 Pa = 0.001015264 psi | 7 psi = 48,263.3 Pa |
| 8 Pa = 0.001160302 psi | 8 psi = 55,158.06 Pa |
| 9 Pa = 0.00130534 psi | 9 psi = 62,052.82 Pa |
| 10 Pa = 0.001450377 psi | 10 psi = 68,947.57 Pa |
| 12 Pa = 0.001740453 psi | 12 psi = 82,737.09 Pa |
| 15 Pa = 0.002175566 psi | 15 psi = 103,421.4 Pa |
| 20 Pa = 0.002900755 psi | 20 psi = 137,895.1 Pa |
| 25 Pa = 0.003625943 psi | 25 psi = 172,368.9 Pa |
| 30 Pa = 0.004351132 psi | 30 psi = 206,842.7 Pa |
| 40 Pa = 0.00580151 psi | 40 psi = 275,790.3 Pa |
| 50 Pa = 0.007251887 psi | 50 psi = 344,737.9 Pa |
| 75 Pa = 0.01087783 psi | 75 psi = 517,106.8 Pa |
| 100 Pa = 0.01450377 psi | 100 psi = 689,475.7 Pa |
| 150 Pa = 0.02175566 psi | 150 psi = 1,034,214 Pa |
| 200 Pa = 0.02900755 psi | 200 psi = 1,378,951 Pa |
| 250 Pa = 0.03625943 psi | 250 psi = 1,723,689 Pa |
| 500 Pa = 0.07251887 psi | 500 psi = 3,447,379 Pa |
| 1000 Pa = 0.1450377 psi | 1000 psi = 6,894,757 Pa |
Pascal vs Pound per square inch: which is bigger?
A pound per square inch is the larger unit: one pound per square inch equals 6,894.757 pascals. Put another way, you need 6,894.757 pascals to make a single pound per square inch.
What is a Pascal? History, origin and usage
The pascal is named after Blaise Pascal, who in 1648 had his brother-in-law carry a mercury barometer up the Puy de Dôme in central France and watch the mercury column fall as he climbed. That experiment showed air has weight and that the pressure it exerts drops with height. The unit itself is much younger: the name was adopted by the General Conference on Weights and Measures in 1971, replacing the older habit of writing pressures as "newtons per square metre".
The pascal is the SI unit of pressure and the base every other unit on this page is defined against. On its own it is awkwardly small for daily life — a sheet of paper resting on a table presses down with only a few pascals — so real-world figures are almost always given with a prefix: hectopascals for weather, kilopascals for tyres and gas, megapascals for concrete and hydraulics.
One pascal is one newton spread over one square metre, which is about the pressure of a five-rupee coin lying flat on a table. Because pressure is force divided by area, the same push concentrated into a smaller area gives a much higher pressure — which is why a drawing pin goes into a wall and your thumb does not.
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.
Convert 1 Pascal to other units
It can help to see a pascal next to the other units it is commonly compared with. One pascal (Pa) is equal to:
| 1 Pascal equals | Unit |
|---|---|
| 0.01 hPa | Hectopascal |
| 0.001 kPa | Kilopascal |
| 0.000001 MPa | Megapascal |
| 0.01 mbar | Millibar |
| 0.00001 bar | Bar |
| 0.000009869233 atm | Standard atmosphere |
| 0.007500617 Torr | Torr |
| 0.007500616 mmHg | Millimetre of mercury |
| 0.0002952998 inHg | Inch of mercury |
| 0.1019716 mmH₂O | Millimetre of water |
| 0.004014631 inH₂O | Inch of water |
| 0.0001450377 psi | Pound per square inch |
| 0.00001019716 kgf/cm² | 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 mmH₂O | Millimetre of water |
| 27.6799 inH₂O | Inch of water |
| 0.07030696 kgf/cm² | Kilogram-force per square centimetre |
Tips for converting Pascal to Pound per square inch
- To go from pascal to pound per square inch, multiply by 0.0001450377; to go back, divide by 0.0001450377 (or multiply by 6,894.757).
- For a quick mental estimate, remember that 1 pascal ≈ 0.0001450377 pound per square inch, so 10 pascal ≈ 0.001450377 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 — change either side to convert in that direction.
How to use this Pascal to Pound per square inch converter
Type a number into the Pascal field and the equivalent in Pound per square inch 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 Pound per square inch field to convert the other way (pound per square inch to pascal). 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 Pa = 0.0001450377 psi), 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 pascal-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 — 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 pound per square inch are in 1 pascal?
- 1 pascal = 0.0001450377 pound per square inch (psi). To convert any number of pascal to pound per square inch, multiply by 0.0001450377.
- How do I convert pascal to pound per square inch?
- Multiply the number of pascal by 0.0001450377. For example, 10 pascal = 10 × 0.0001450377 = 0.001450377 pound per square inch, and 25 pascal = 0.003625943 pound per square inch.
- How many pascal are in 1 pound per square inch?
- 1 pound per square inch = 6,894.757 pascal. So to convert pound per square inch back to pascal, multiply by 6,894.757.
- What is the formula to convert pascal to pound per square inch?
- pound per square inch = pascal × 0.0001450377. The reverse formula is pascal = pound per square inch × 6,894.757.
- How much is 100 pascal in pound per square inch?
- 100 pascal = 0.01450377 pound per square inch. (And 1000 pascal = 0.1450377 pound per square inch.)
- Which is bigger, a pascal or a pound per square inch?
- A pound per square inch is larger: 1 pound per square inch = 6,894.757 pascal.
- Is this pascal to pound per square inch converter accurate?
- Yes — every value is computed from the exact 0.0001450377 psi per Pa factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert pound per square inch to pascal too?
- Yes. The converter works both ways — enter a value in either field. 1 pound per square inch = 6,894.757 pascal.