Running Shoe Mileage Remaining Calculator
See how many miles are left in your running shoes and roughly how many weeks until they are due for replacement.
How it works
Miles remaining = expected life − miles run · Weeks left = miles remaining ÷ weekly mileage
Running shoes lose cushioning and stability long before they look worn out, and running on dead midsole foam is a common cause of nagging injuries. Most trainers last somewhere between 300 and 500 miles depending on the foam, your weight and the terrain. Tracking cumulative mileage — and rotating between two pairs so each gets recovery time between runs — is the simplest way to know when a shoe is done.
Worked example
A shoe rated for 400 miles with 250 already run has 150 miles left, which is 37.5% of life still to go. At 20 miles a week that is about 7.5 weeks before replacement.
Frequently asked questions
How long do running shoes really last?
Most road shoes last 300–500 miles. Lightweight racing shoes wear out sooner, while some max-cushion trainers go further. Heavier runners and rough surfaces shorten the life at the low end of that range.
Should I rotate more than one pair?
Yes. Rotating two or more pairs lets the foam decompress between runs, which can extend total life and reduce injury risk by varying the load on your legs.
What are the signs a shoe is worn out?
Watch for flattened or creased midsole foam, worn-through outsole tread, new aches in the feet or shins, and a general loss of bounce. If in doubt, compare the feel against a fresh pair.
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This calculator is for educational purposes. Double-check important results before acting on them.