Load, Pressure & Safety

Tire Pressure Unit Converter

Convert tire pressure between psi, bar, kPa, kgf/cm² and atm. Includes a table of common tire pressures from 20 to 80 psi.

Load, Pressure & Safety

Convert PSI, bar, and kPa.

Open Live Calculator

Tire Pressure Unit Converter: Tire Size Inputs

Compare two tire sizes here. Use the formulas and reference tables below for this tool's specific calculation.

ISO/TRA Compliant

Baseline Tire (T1)Stock OEM

Width (mm)

Aspect (%)

Rim (in)

Comparison Tire (T2)Proposed Setup

Width (mm)

Aspect (%)

Rim (in)

Baseline OD634.3 mm24.97"

Comparison OD637.2 mm25.09"

Diameter Variance+2.9 mm+0.46%

Speed @ 60 MPH60.3 MPH-4 revs/mi

How Tire Pressure Unit Converter Works?

The Tire Pressure Unit Converter works by converting the entered value to kilopascals and then to every other unit with fixed factors. The tool uses 3 steps.

Pick the input unit
Choose psi, bar, kPa, kgf/cm² or atm.
Enter the value
Type the pressure, for example 2.4 bar.
Read all units
The converter returns 34.8 psi, 240 kPa, 2.45 kgf/cm² and 2.37 atm.

Tire Pressure Unit Converter Formula

The Tire Pressure Unit Converter formula is 1 psi = 6.89476 kPa = 0.0689476 bar.

psi → kPakPa = psi × 6.89476

psi → barbar = psi × 0.0689476

bar → psipsi = bar × 14.5038

kPa → kgf/cm²kgf/cm² = kPa ÷ 98.0665

psi: Pounds per square inch
bar: 100 kPa
kgf/cm²: Kilogram-force per square centimeter, used on older gauges

Worked example

A placard value of 230 kPa equals 2.30 bar and 33.4 psi. A sidewall maximum of 51 psi equals 3.52 bar (352 kPa).

Tire Pressure Unit Converter Conversion Table

The Tire Pressure Unit Converter conversion table converts 13 common tire pressures from 20 psi to 80 psi into 4 other units.

Common tire pressures in 5 units
psi	bar	kPa	kgf/cm²	atm
20 psi	1.38 bar	138 kPa	1.41 kgf/cm²	1.36 atm
26 psi	1.79 bar	179 kPa	1.83 kgf/cm²	1.77 atm
30 psi	2.07 bar	207 kPa	2.11 kgf/cm²	2.04 atm
32 psi	2.21 bar	221 kPa	2.25 kgf/cm²	2.18 atm
33 psi	2.28 bar	228 kPa	2.32 kgf/cm²	2.25 atm
35 psi	2.41 bar	241 kPa	2.46 kgf/cm²	2.38 atm
36 psi	2.48 bar	248 kPa	2.53 kgf/cm²	2.45 atm
38 psi	2.62 bar	262 kPa	2.67 kgf/cm²	2.59 atm
41 psi	2.83 bar	283 kPa	2.88 kgf/cm²	2.79 atm
44 psi	3.03 bar	303 kPa	3.09 kgf/cm²	2.99 atm
50 psi	3.45 bar	345 kPa	3.52 kgf/cm²	3.40 atm
65 psi	4.48 bar	448 kPa	4.57 kgf/cm²	4.42 atm
80 psi	5.52 bar	552 kPa	5.62 kgf/cm²	5.44 atm

What is Tire Pressure Unit Converter?

A Tire Pressure Unit Converter is a tool that converts tire inflation pressure between the units used around the world. North American placards use psi, European placards use bar, and Canadian, Australian and Asian placards often use kPa.

Tire pressure gauges read gauge pressure, the pressure above atmospheric. All values in the converter are gauge pressure.

Rounding hides small differences. 2.4 bar equals 34.8 psi, not 35 psi.

What are the uses of Tire Pressure Unit Converter?

There are 4 main uses of the Tire Pressure Unit Converter, including imported vehicle placards and gauge reading.

Imported vehicle placards
Read a placard in a unit the local gauge does not show.
Gauge reading
Use a bar gauge with a psi placard.
Travel
Inflate at foreign gas stations with different units.
Spec sheets
Compare tire maker data in a single unit.