CalcLibrary

Pressure Converter

Convert known pressure readings between Pa, hPa, kPa, MPa, bar, psi, atm, mmHg, and inHg. Built for tire inflation, shop-air specs, lab references, weather reports, and aviation barometer comparisons.

Examples

Convert 2.2 bar into psi before topping up a tire.

Converted pressure
31.908304 psi
Pa conversion path
2.2 bar × (100000 Pa/bar) ÷ (6894.757 Pa/psi) = 31.908304 psi

The result is larger because the target pressure unit is smaller. One source unit holds about 14.50 target units.

Pressure unit converter only — it does not interpret blood pressure, certify gauges, predict weather, or confirm compliance.

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Examples

How It Works

Formula

r=v×ffromftor = v \times \dfrac{f_{\text{from}}}{f_{\text{to}}}

Variables

vv

Input pressure value

rr

Converted pressure

ffromf_{\text{from}}

Pascal factor of the source unit(Pa)

ftof_{\text{to}}

Pascal factor of the target unit(Pa)

The calculator uses pascals as the canonical base unit. Your input is multiplied by the source unit factor to get pascals, then divided by the target unit factor. The result is a pure pressure-unit conversion with fixed constants, not a live lookup.

Reference factors used by the calculator (pascals per unit):

  • 1 Pa = 1 Pa
  • 1 hPa = 100 Pa
  • 1 kPa = 1,000 Pa
  • 1 MPa = 1,000,000 Pa
  • 1 bar = 100,000 Pa
  • 1 psi = 6,894.757 Pa
  • 1 atm = 101,325 Pa
  • 1 mmHg = 133.3224 Pa
  • 1 inHg = 3,386.389 Pa

The result row also shows the exact source -> Pa -> target factor trail used for the specific conversion.

Frequently Asked Questions

01How does this pressure converter work?
Every supported unit is defined as a fixed number of pascals. The calculator multiplies your source reading into pascals first, then divides by the target unit factor. That keeps tire, shop-air, weather, and lab conversions on one auditable pressure scale.
02Where do people usually see psi, bar, kPa, and MPa?
psi and bar are common on tire gauges and air tools. kPa and MPa show up in technical specs, industrial sheets, and engineering references. The calculator keeps the same physical pressure while swapping the unit style.
03Why are hPa, mmHg, and inHg included?
hPa is common on weather maps and barometers, while mmHg and inHg appear in mercury-barometer style references and aviation comparisons. This tool converts the units only; it does not interpret the weather or altitude impact for you.
04Why do some results show several decimal places?
Pressure units vary a lot in size, so the converted number can need more digits to stay useful. The calculator uses fixed factors underneath and shows up to six fractional digits, trimming unnecessary trailing zeros in the final display.
05Can I use this for blood pressure, gauge certification, or compliance checks?
No. This is a pressure unit converter only. It restates one known pressure reading in another unit, but it does not interpret medical readings, certify instruments, validate calibration, or confirm regulatory compliance.

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