Unit Converters · Science & Engineering Units
Pressure Converter
Convert pressure between SI units (pascal, kPa, MPa, hPa), bar, standard atmospheres, psi, kilograms-force per square centimetre (kg/cm², used for tyres and boilers in India), and mercury and water columns (mmHg, torr, inHg, cmH₂O) using exact NIST factors.
Also listed inEngineeringScience & Weather
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1 Pound per square inch (psi) =
0.06894757293 Bar
1 Pound per square inch (psi) = 0.06894757293 Bar
- Pascals
- 6,894.757293
- Hectopascals (mbar)
- 68.94757293
- Kilopascals
- 6.894757293
- Megapascals
- 0.006894757293
- Atmospheres
- 0.06804596391
- Kilograms-force per cm² (kg/cm²)
- 0.07030695796
- Millimetres of mercury (mmHg)
- 51.7149252
- Torr
- 51.71493257
- Inches of mercury (inHg)
- 2.036020461
- Centimetres of water (cmH₂O)
- 70.30695796
How this is calculated
Result = value × (pascals per 'from' unit) ÷ (pascals per 'to' unit)
- 1 atm
- 101,325 Pa exactly; 1 bar = 100,000 Pa; 1 psi = 6,894.757 Pa
Each unit is defined as a fixed number of pascals (newtons per square metre), so converting is one multiplication and one division. A car tyre at 32 psi is about 2.2 bar or 2.25 kg/cm²; normal air pressure is 1 atm = 1.01325 bar = 760 mmHg.
Assumptions & sources
- Gauge and absolute pressure convert the same way — this converts the number, not the reference.
- inHg and mmHg are the conventional values at 0 °C.
- 1NIST Special Publication 811 — Guide for the Use of the International System of Units (conversion factors) — National Institute of Standards and Technology
- 2The International System of Units (SI Brochure, 9th edition) — BIPM
Calculator ID UNIT-PRESSURE-001 · version 1.0.0
Common questions
How many bar is 32 psi?
32 × 6,894.757 ÷ 100,000 = 2.206 bar.
Is kg/cm² the same as bar?
Nearly: 1 kg/cm² = 0.980665 bar.
What is 120 mmHg in kPa?
120 × 0.133322 = 16.0 kPa.