How to use this calculator
- Enter the requested journey or vehicle details.
- Select the matching units and options.
- Choose Calculate to see the estimate and supporting values.
- Change any value and calculate again to compare scenarios.
How the calculation works
The entered value is converted through pascals using fixed unit conversion factors.
Formula: 1 BAR = 14.5038 PSI = 100 kPa.
Worked example
32 PSI is approximately 2.21 BAR or 220.63 kPa.
What can affect the result?
Always check the manufacturer label or handbook, including separate loaded-vehicle recommendations where applicable.
Check the correct pressure
This tool converts pressure units only. It does not recommend a pressure. Check the vehicle handbook, fuel-filler flap or door frame for the vehicle manufacturer’s specified cold-tyre pressure.
Frequently asked questions
What pressure should my tyres use?
Check the vehicle manufacturer’s label or handbook.
Does temperature matter?
Pressure changes with temperature, so follow the manufacturer’s checking procedure.
