Tire Pressure Calculator
Estimate a starting tyre pressure from the load each tyre carries against its rated maximum.
The door placard wins
This is a load-based estimate. The manufacturer's placard inside the driver's door is the authoritative figure for your vehicle, because it accounts for handling balance and ride as well as load. Use this to understand why the placard says what it says, and to adjust when carrying a full load.
What this page needs from you
This page asks for load per tyre in kg, tyre max load in kg and tyre max pressure in kPa. From those it returns suggested pressure in kPa, together with in psi, in bar, load as % of max and cold pressure to set. Every figure updates as you type, and nothing you enter leaves your browser.
When to use something else
Every calculation is a model, and a model is a deliberate simplification. Where the answer will drive a decision that is expensive or hard to reverse, use this to understand the shape of the problem and then confirm the specifics with someone who can see details this page cannot.
Reading the result properly
The figure above answers exactly the question the inputs describe and no more. Changing one input at a time and watching which part of the breakdown moves usually teaches more than the headline number does, because it shows which variable your situation is actually sensitive to.
The formula
P ≈ P_max × load ÷ max load
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Tire Pressure Calculator
- Fill in each field with your own figures — the defaults are only there as an example.
- The result updates as you type, so there is no button to press.
- Check the breakdown under the main result for the supporting numbers.
- Use the copy button to take the result with you, or share the link to reload the same inputs.
Tire Pressure Calculator — frequently asked questions
Is this tire pressure calculator free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
How accurate is the result?
The maths is exact for the formula shown on the page. Accuracy in the real world depends on your inputs and on assumptions the formula cannot see, so treat the output as a well-grounded estimate rather than a quote.
Can I use it on my phone?
Yes. The page is responsive, weighs a few kilobytes and works offline once loaded, so it behaves the same on a phone as on a desktop.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the tire pressure calculator.
- tire pressure calculator
- tire inflation calculator
- psi for my tires
- correct tire pressure
- tyre pressure by load
About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed September 10, 2026 · Calculation runs client-side · No data collected · Report an error