Question 1

How do I convert PSI to bar?

Accepted Answer

1 PSI equals 0.0689476 bar. To convert PSI to bar, multiply by 0.0689476. For example, 32 PSI equals about 2.2 bar. This tool converts automatically between PSI, bar, kPa and atm.

Question 2

What PSI should my tires be?

Accepted Answer

Most passenger cars recommend 30-35 PSI (2.0-2.4 bar) cold. Check the sticker inside the driver door jamb or your owner manual for the exact figure. Never use the max pressure printed on the tire sidewall as your target.

Question 3

Should I increase tire pressure for heavy loads?

Accepted Answer

Yes. When carrying heavy loads or towing, increase pressure by 2-4 PSI as specified in your vehicle manual. This calculator lets you apply a load adjustment factor.

Question 4

Is my data sent to any server?

Accepted Answer

No. All calculations happen entirely in your browser. No data is ever sent to any server.