Tyre Pressure Calculator
Calculate the recommended tyre pressure for your vehicle based on tyre size, load, and driving conditions. PSI, bar and kPa units.
Recommended Tyre Pressure
Common Tyre Pressure Reference
| Vehicle Type | Front (PSI) | Rear (PSI) | Front (bar) | Rear (bar) |
|---|---|---|---|---|
| Small hatchback | 30 | 28 | 2.1 | 1.9 |
| Saloon / Sedan | 32 | 30 | 2.2 | 2.1 |
| Estate / Wagon | 33 | 35 | 2.3 | 2.4 |
| SUV / Crossover | 33 | 33 | 2.3 | 2.3 |
| Van / Light commercial | 36 | 42 | 2.5 | 2.9 |
Tyre Pressure Calculator
Find the recommended tyre pressure for your vehicle and adjust it for load conditions, temperature changes, and motorway driving. Proper tyre pressure improves safety, fuel economy, and tyre life.
What This Tool Does
Enter your vehicle type and tyre size, and the calculator provides the recommended cold tyre pressure. It then adjusts the recommendation based on your specific conditions: heavy load (luggage, passengers), ambient temperature, and whether you will be doing sustained motorway driving.
How to Use It
- Select your vehicle type (car, SUV, van) and tyre size.
- View the base recommended pressure (front and rear).
- Adjust for conditions: toggle heavy load, cold weather, or motorway driving.
- See the adjusted pressure recommendations and the reasoning behind each adjustment.
Why Tyre Pressure Matters
Under-inflated tyres increase fuel consumption by up to 3%, reduce tyre life by 25%, and significantly increase braking distances. Over-inflated tyres reduce the contact patch, leading to less grip and uneven wear. Checking pressure monthly and before long journeys is one of the simplest ways to improve driving safety.
Data Sources
Base pressure recommendations follow vehicle manufacturer guidelines and tyre industry standards (ETRTO). Adjustment factors are based on tyre engineering data and published guidance from tyre manufacturers including Continental, Michelin, and Bridgestone.
Frequently Asked Questions
The recommended tyre pressure is usually found on a sticker inside the driver's door frame or in your vehicle owner's manual. Typical values range from 30-35 PSI (2.0-2.4 bar) for passenger cars.
Yes. When carrying heavy loads or towing, increase tyre pressure by 3-5 PSI (0.2-0.3 bar) above the standard recommendation. Check your vehicle manual for specific loaded-pressure values.
Yes. Tyre pressure drops by about 1 PSI (0.07 bar) for every 10°F (5.5°C) decrease in temperature. Check pressure more frequently in cold weather and always measure when tyres are cold.