Pressure Converter
Convert hPa, bar, psi, atm, mmHg, and kPa.
Last reviewed by the myCalculator Editorial Team
Input Parameters
Calculation Results
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Formula & How Pressure Converter Works
Standard atmospheric pressure is 1,013.25 hPa, which equals 101.325 kPa, 1.01325 bar, 14.696 psi and 760 mmHg. A car tyre at 32 psi is 32 × 6.89476 = about 221 kPa. Pilots set altimeters to a QNH in hectopascals, weather maps use hPa, and tyre and hydraulic gauges often use psi or bar. Note that gauge pressure measures above atmospheric, while absolute pressure includes the atmosphere, so a gauge reading of 0 psi is about 14.7 psi absolute. Enter the value and select the units to convert between hPa, kPa, bar, psi, atm and mmHg.
- Enter Pressure Value: Input your target parameter value.
- Enter From Unit: Input your target parameter value.
- Enter To Unit: Input your target parameter value.
- Apply Formula: Calculate using
1 atm = 1013.25 hPa = 14.6959 psi = 1.01325 bar. - Review Results: View exact computed answers, metrics, and worked mathematical proofs.
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Frequently Asked Questions (FAQs)
What is normal car tire pressure in psi and bar?
Typical car tires require 32–35 psi (2.2–2.4 bar).
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