Tire Wear Life Calculator

A tire's treadwear rating tells you how long it's designed to last — but your actual mileage depends on how, where, and in what conditions you drive. Enter your tire's treadwear rating, original and current tread depth, miles driven, and annual mileage, then select your driving conditions, climate, and driving style to get your estimated total tire life. The Tire Wear Life Calculator also returns remaining tire life, months until replacement, your current wear rate, and the tread depth at which you should replace them.

Found on tire sidewall (e.g., 400, 500)

New tire tread depth

/32 inch

Measure with penny test or tread gauge

miles
miles/year

Results

Estimated Total Tire Life

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Remaining Tire Life

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Estimated Months Remaining

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Wear Rate

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Replacement at Tread Depth

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Frequently Asked Questions

How accurate is the tire wear life calculator?

The calculator provides estimates based on treadwear ratings and driving patterns. Actual tire life can vary by ±20% depending on specific driving habits, road conditions, tire maintenance, and vehicle alignment.

What treadwear rating means and where do I find it?

Treadwear rating is a number on your tire sidewall (like 400 or 500) that indicates relative tire durability. Higher numbers typically mean longer-lasting tires under standard test conditions.

When should I replace my tires based on tread depth?

Replace tires when tread depth reaches 2/32 inch (legal minimum) or 4/32 inch for better wet weather performance. Winter driving requires at least 6/32 inch for adequate snow traction.

How do driving conditions affect tire wear?

Highway driving typically causes less wear than city stop-and-go traffic. Hot climates, aggressive acceleration/braking, and poor road surfaces can significantly reduce tire life by 15-30%.

How often should I rotate my tires?

Rotate tires every 5,000-8,000 miles or as recommended by your vehicle manufacturer. Regular rotation helps ensure even wear and maximizes overall tire life.

Can I predict when my tires will reach unsafe tread depths?

Yes, based on your current wear rate, the calculator estimates when you'll reach 4/32 inch (recommended replacement) and 2/32 inch (legal minimum) tread depths.

Does tire alignment affect these calculations?

Poor alignment causes uneven wear that can reduce tire life by 25-50%. The calculator assumes proper alignment - if you notice uneven wear patterns, get your alignment checked.

How do I measure tread depth accurately?

Use a tread depth gauge for best accuracy, or try the penny test: insert a penny head-first into the tread groove. If you can see Lincoln's head, it's time to replace the tire (2/32 inch or less).