Online Tool Store
Tire Wear Estimator
Estimate tire wear rate, miles remaining, and total projected life from starting tread, current tread, miles driven, and a chosen wear limit.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Wear rate
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Miles remaining
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Estimated total life
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How Tire Wear Estimator works
- Enter the tire's starting tread depth (new-tire spec, usually 10/32" or 11/32"), its current depth, and the miles driven since new.
- Wear rate is
(starting depth − current depth) ÷ miles driven, expressed per 1,000 miles — how many 32nds of an inch this tire loses per 1,000 miles at your typical driving pattern. - Remaining usable tread is
current depth − legal wear limit; dividing that by the wear-per-mile rate projects how many more miles until the tire hits the limit. - The progress bar shows percentage of total usable tread already worn away, colour-coded green, amber, and red as the limit approaches.
This is a straight-line projection from your measured wear rate so far — it assumes future miles wear the tire at the same rate as the miles already driven, which holds well for steady daily driving but can shift with alignment, rotation habits, or a change in typical routes.
FAQ
How do I measure tread depth?
A tread depth gauge is the accurate way, but the classic penny test works too: insert a penny into the tread groove with Lincoln's head down — if you can see the top of his head, tread is at or below roughly 2/32", the US federal wear limit. Most tire shops will also measure it for free.
Why 2/32" as the default legal limit?
That is the wear limit used across most of the United States; a tire below it loses significant wet-weather traction and is illegal to drive on in many states. Some regions and some drivers (especially in snow) use a stricter 4/32" or 5/32" threshold instead — adjust the field if yours differs.
Why does the estimate assume wear continues at the same rate?
It is a linear projection — same wear per mile going forward as measured so far — which is a reasonable estimate for a tire on the same vehicle, driving style, and roads, but wear rate can shift with alignment issues, rotation habits, and seasonal driving, so treat the number as a planning estimate rather than an exact date.
How we compare
| Feature | Online Tool Store | Doing it manually | A generic online tool |
|---|---|---|---|
| No file upload — runs in your browser | ✓ | N/A | ✗ |
| No sign-up required | ✓ | ✓ | ✗ |
| Free, no watermark | ✓ | ✓ | ✗ |
A tire shop's wear estimate usually comes bundled with a sales pitch for new tires. This calculator uses only the numbers you already measured — starting depth, current depth, and miles driven — to project remaining life with a transparent formula.