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Pressure Converter

Convert pressure between Pa, kPa, MPa, bar, psi, atm, mmHg, kgf/cm² and more — all units shown at once with click-to-copy.

Input

Value

From unit

Enter a value and unit. All equivalents appear below.

Presets

Results

Reference table

Value	kPa	MPa	bar	psi	atm
1 bar	100	0.1	1	14.504	0.9869
1 atm	101.325	0.1013	1.0133	14.696	1
1 MPa	1000	1	10	145.04	9.8692
1 psi	6.8948	0.00689	0.06895	1	0.06805
1 kgf/cm²	98.0665	0.09807	0.9807	14.2233	0.9678
1 mmHg	0.13332	0.000133	0.001333	0.01934	0.001316
100 psi	689.48	0.6895	6.8948	100	6.8046
10 bar	1000	1	10	145.04	9.8692

FAQ

What is the difference between bar and atm?

1 bar = 100,000 Pa exactly, while 1 standard atmosphere (atm) = 101,325 Pa. The two are close but not equal: 1 atm = 1.01325 bar. Bar is a metric unit not in the SI; atm reflects average sea-level atmospheric pressure.

Are mmHg and torr the same?

Yes, for everyday purposes. 1 torr is defined as 1/760 of a standard atmosphere, which equals 133.3224 Pa. 1 mmHg is defined from the density of mercury at 0°C and standard gravity, also 133.3224 Pa. The difference is below 1 part per million and is ignored in practice.

What is kgf/cm² (technical atmosphere)?

kgf/cm² is the pressure exerted by 1 kilogram-force on 1 square centimeter: 1 kgf/cm² = 98,066.5 Pa ≈ 0.9807 bar. It is also called a technical atmosphere (at) and is common on European and Russian pressure gauges for tires, compressors, and hydraulics.

How do I convert psi to kPa?

Multiply psi by 6.8948. For example, a tire pressure of 32 psi = 32 × 6.8948 ≈ 220.6 kPa. To go back, divide kPa by 6.8948.

What is the difference between gauge and absolute pressure?

Absolute pressure is measured from a perfect vacuum. Gauge pressure is measured from local atmospheric pressure, so gauge = absolute − atmospheric (about 101.325 kPa at sea level). A tire reading of 2.2 bar on the gauge corresponds to roughly 3.2 bar absolute. This converter handles the numerical unit conversion; the gauge/absolute distinction is a separate question of reference point.

Why does the converter show kN/m² and N/m²?

N/m² is identical to the pascal (Pa); 1 N/m² = 1 Pa. 1 kN/m² is identical to 1 kPa. These notations appear in structural engineering, soil mechanics, and European load codes, where forces are written in newtons rather than in pascals directly.

Results are calculated using standard SI conversion factors. Values are rounded for display; full precision is preserved internally.

This pressure converter handles the full set of units used in engineering, physics, meteorology, and everyday life: pascal (Pa), kilopascal (kPa), megapascal (MPa), gigapascal (GPa), bar, millibar, standard atmosphere (atm), psi (pound-force per square inch), lbf/ft², kgf/cm² (technical atmosphere), kgf/m², tf/m², kN/m², N/m², millimeters and centimeters and inches of mercury, and meters, centimeters and inches of water column. Enter any value, pick the input unit, and every equivalent is displayed at once. Click any result to copy it to the clipboard. Presets cover common cases: atmospheric pressure (1 atm), car tires (32 psi), hydraulic systems (200 bar), steam boilers (1.6 MPa), and soil bearing capacity (200 kPa). For example, a tire pressure of 32 psi is 220.6 kPa, 2.206 bar, or 2.249 kgf/cm². The reference table lists the most common equivalents at a glance, and the FAQ explains bar vs atm, mmHg vs torr, and gauge vs absolute pressure.