Pa to PSI Converter
One pound per square inch is 6,894.757293168 pascals, so pascals to psi is a single division: psi = Pa / 6,894.757293168, which makes 1 Pa exactly 0.00014503773773 psi as printed here. The pascal is a small unit, one newton on a square metre, so everyday pressures land on familiar psi figures only once the pascal count is large: 100,000 Pa (one bar) is 14.503773773 psi, 101,325 Pa (one standard atmosphere) is 14.6959487755 psi, and 1,000,000 Pa (one megapascal) is 145.03773773 psi. The factor itself is defined rather than measured, since a pound is exactly 0.45359237 kg, standard gravity is exactly 9.80665 m/s² and an inch is exactly 0.0254 m, which puts one psi at 6,894.75729316836... Pa, a decimal that never ends. This converter stores thirteen significant figures of it and prints twelve of the answer. The page opens with pascals in the From box and psi in the To box, whatever pair you converted last, and lists the same pressure in kilopascals, bar, psi and atmospheres under the answer, with millimetres of mercury behind the uncommon units switch.
1 Pa in every pressure unit
Common questions
- How many psi is 1 Pa?
- 0.00014503773773 psi, which is 1 / 6,894.757293168. The pascal is small enough that the answer only grows into everyday numbers by the thousand: 100 Pa is 0.014503773773 psi, 1,000 Pa is 0.14503773773 psi, 10,000 Pa is 1.4503773773 psi, 100,000 Pa is 14.503773773 psi and 1,000,000 Pa is 145.03773773 psi. Type any of them in the From box and the headline updates as you type.
- What is the formula for Pa to psi?
- psi = Pa / 6,894.757293168, or psi = Pa × 0.00014503773773 if you would rather multiply. Going the other way, Pa = psi × 6,894.757293168, so 30 psi is 206,842.718795 Pa, 32 psi is 220,632.233381 Pa and 100 psi is 689,475.729317 Pa. The Swap units button between the two boxes reverses the pair, so this page turns into a psi to Pa converter without a reload.
- Is the Pa to psi conversion exact?
- The definition is exact, the decimal is not. A pound-force is exactly 4.4482216152605 newtons (0.45359237 kg times standard gravity of exactly 9.80665 m/s²) and a square inch is exactly 0.00064516 m², so one psi works out at 6,894.75729316836... Pa and runs on without terminating. Every converter has to round somewhere. This one keeps thirteen significant figures of the factor and shows twelve of the result, so the rounding sits below the last digit you can read, which is why 1 Pa prints as 0.00014503773773 rather than 0.000145.
- What is 200,000 Pa in psi?
- 29.007547546 psi. Put 200000 in the From box and the list under the answer reads 200 kPa, 2 bar and 1.97384653343 atm for the same pressure, because the converter works out every pressure unit at once rather than one target at a time. A related figure people look for: 250,000 Pa is 36.2594344326 psi and 300,000 Pa is 43.5113213191 psi. One caution about gauges. A tyre or compressor gauge reads pressure above the surrounding air, and this converter changes units and nothing else, so it never adds or subtracts an atmosphere on your behalf.
- Is 100 Pa the same as 100 kPa?
- No, and the gap is a factor of a thousand, which is the mistake worth checking first. 100 kPa is 100,000 Pa, or 14.503773773 psi, while 100 Pa is 0.014503773773 psi. Most quoted pressures are kilopascals or hectopascals rather than bare pascals: a 220 kPa tyre placard is 220,000 Pa, or 31.9083023006 psi, and a weather report of 1,013 hPa is 101,300 Pa, or 14.6923228321 psi. Kilopascals sit in the unit list on this page, so you can pick kPa in the From box instead of multiplying by 1,000 yourself.
- What is atmospheric pressure in Pa and psi?
- One standard atmosphere is defined as exactly 101,325 Pa, which this page converts to 14.6959487755 psi, the number usually quoted as 14.7 psi. Type 101325 and the rows under the answer read 101.325 kPa, 1.01325 bar and exactly 1 atm, with 759.999891726 mmHg once the Show 1 more switch is on. The millimetre of mercury here is the conventional mmHg of 133.322387415 Pa, a hair larger than a torr, which is why the reading is not a round 760.
- Why did my answer come back as 1.450377e-7?
- Because the result dropped below 0.000001, and under that the display switches to exponential notation rather than printing a run of zeros. 0.001 Pa is 1.450377e-7 psi and 0.1 Pa is 0.000014503773773 psi, still in plain decimal. The From box reads scientific notation too, so typing 1e5 is accepted as 100,000 Pa, and Copy result copies the plain number without the thousands separators shown on screen.
- Why does the page open on pascals and psi when I last converted something else?
- Because a page that names a pair should show that pair. This one sets pascals and psi on arrival, ahead of whatever the converter last remembered, and it leaves the main unit converter's memory alone: go back to /unit-converter and it is still on the pair you left it on. The number you last typed does come with you, since it is usually the one you are still working on, and so does the uncommon units switch.
Conversion factors are the exact legal definitions where one exists. An inch is exactly 2.54 cm and a pound exactly 0.45359237 kg, so those conversions are exact rather than approximate. Temperature uses offsets rather than factors, and that is shown in the working.