How many psi are in 1 bar?

1 bar equals about 14.5038 psi. The converter uses the exact factor 1 psi = 6894.757293168361 Pa and 1 bar = 100000 Pa, so bar-to-psi is 100000 divided by 6894.757293168361.

What is the difference between torr and mmHg?

They are almost identical but defined differently. 1 torr is exactly 1/760 of a standard atmosphere (101325 Pa), while 1 mmHg uses the conventional value 133.322387415 Pa. The two differ by less than two parts per million, which only matters in precise scientific work.

Is bar the same as atmosphere?

No, but they are close. 1 bar is exactly 100000 Pa, whereas 1 standard atmosphere (atm) is 101325 Pa. So 1 atm is about 1.01325 bar — roughly 1.3% higher than 1 bar.

What pressure unit do tyres use?

Car tyres are usually quoted in psi (pounds per square inch) in the US and UK, or in bar/kPa elsewhere. A typical 32 psi tyre is about 2.21 bar or 221 kPa. Enter 32 psi here to see every equivalent.

Why convert through pascals?

The pascal is the SI base unit of pressure, so every other unit has an exact or conventional factor relative to it. The tool converts your input to pascals first, then out to the target unit, which keeps the full result grid internally consistent.

Is my data sent anywhere?

No. Every calculation is pure arithmetic that runs in your browser. No values are uploaded, logged or stored on any server.

Pressure Converter — Gera Tools

A fast, accurate pressure converter that turns any value between the eight units engineers, divers, meteorologists, mechanics and chemists actually use: pascal (Pa), kilopascal (kPa), bar, pounds per square inch (psi), standard atmosphere (atm), millimetre of mercury (mmHg), torr and inch of mercury (inHg). Type a number, pick your from and to units, and the headline answer appears instantly — alongside a full grid showing the same pressure expressed in every other unit at once. A swap button flips the direction in one click.

How it works

Pressure is force per unit area, and the pascal (one newton per square metre) is the SI base unit. Every other unit is just a fixed multiple of the pascal, so the converter works in two simple steps. First it multiplies your input by the pascal-equivalent of the starting unit to get a value in pascals. Then it divides by the pascal-equivalent of the target unit. Because every unit shares this single pascal pivot, the whole result grid stays perfectly consistent no matter which field you change.

The factors are exact wherever the definitions allow it: 1 bar is exactly 100000 Pa, 1 atm is exactly 101325 Pa, and 1 psi is exactly 6894.757293168361 Pa (one pound-force of 4.4482216152605 N spread over a square inch of 0.0254 m per side). The mercury units use the conventional 1 mmHg = 133.322387415 Pa, while 1 torr is defined as 1/760 of a standard atmosphere — the two differ by under two parts per million. Inch of mercury uses the conventional 0 °C value of 3386.389 Pa.

The display rounds sensibly: large numbers show four decimals, mid-range values show six, and very small results fall back to scientific notation so you never lose precision. Nothing is ever sent over the network.

Worked example

Suppose your tyre gauge reads 32 psi and the workshop manual specifies the pressure in bar. Select psi as the from unit, bar as the to unit, and type 32. The tool multiplies 32 by 6894.757293168361 to get 220632.23 Pa, then divides by 100000 to give roughly 2.2063 bar. The grid also reveals 220.63 kPa, 2.177 atm, 1654.9 mmHg and 65.15 inHg for the same pressure — handy if you cross-check against a different gauge. Hit swap and the tool now reads bar in and psi out, ready for the reverse calculation.

Conversion reference

From 1 unit	Pa	kPa	bar	psi	atm	mmHg
1 Pa	1	0.001	0.00001	0.000145	0.0000099	0.0075
1 kPa	1000	1	0.01	0.145038	0.009869	7.50062
1 bar	100000	100	1	14.5038	0.986923	750.062
1 psi	6894.76	6.89476	0.068948	1	0.068046	51.7149
1 atm	101325	101.325	1.01325	14.6959	1	760
1 mmHg	133.322	0.133322	0.0013332	0.019337	0.0013158	1

Every figure is calculated locally in your browser — no numbers are uploaded or stored.