Tire Life Estimate Calculator
Estimate how many miles or kilometers your tires will last based on tread depth, wear rate, and driving conditions.
Know when to start budgeting for new tires.
How Long Will Your Tires Last?
Tire lifespan depends on tread depth, driving habits, road conditions, tire quality, and how well tires are maintained. Understanding your tires’ remaining life helps you budget and stay safe.
Tire Tread Depth Explained
Tread depth is measured in 32nds of an inch (USA) or millimeters (metric).
| Tread Depth | Status |
|---|---|
| 10/32" (8 mm) | New tire |
| 6/32" (4.8 mm) | Good β plenty of life remaining |
| 4/32" (3.2 mm) | Time to start shopping for new tires |
| 2/32" (1.6 mm) | Legal minimum in most countries β replace immediately |
| 1/32" (0.8 mm) | Dangerous β illegal in most jurisdictions |
The penny test: Insert a penny into the tread with Lincoln’s head pointing down. If you can see the top of Lincoln’s head (above 2/32"), replace your tires.
Average Tread Wear Rates
| Driving Style | Tread Wear Per 10,000 km |
|---|---|
| Highway / gentle | 0.5β1.0 mm (1β2 /32") |
| Mixed city/highway | 1.0β1.5 mm (2β3 /32") |
| Aggressive / city | 1.5β2.5 mm (3β5 /32") |
Premium tires rated 50,000+ miles often wear slower than economy tires. Tire rotation every 10,000β12,000 km significantly extends tire life.
Factors That Reduce Tire Life
- Under-inflation (most common cause of premature wear)
- Misalignment (causes uneven wear on one side)
- Aggressive acceleration and braking
- Hot climates accelerate rubber degradation
- Overloading the vehicle
Age Matters Too
Even if tread depth is adequate, tires over 6 years old should be inspected by a professional. Rubber degrades from UV exposure, heat, and ozone regardless of mileage. Most manufacturers recommend replacing tires at 10 years maximum, regardless of tread.
Results are shown in both km and miles.