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Most running shoes last somewhere between 300 and 500 miles. For a runner doing 15–20 miles a week, that works out to roughly every 4 to 8 months. But mileage is only a starting point. Your weight, your stride, the surfaces you run on, and the type of shoe all change how fast the foam breaks down.
If you have flat feet or overpronate, it matters even more. The stability features that keep your arch from collapsing wear down along with the cushioning, and once they’re gone, your feet, shins, and knees take the load. Use the calculator below to see where your current pair stands, then read on for the signs that it’s time for a new one.
Shopping for a new pair? Our guide to the best shoes for flat feet includes a free quiz that matches shoes to your arches.
Running Shoe Replacement Calculator
Enter your shoe type, when you started wearing them, and how much you run. The calculator estimates how many miles are on your shoes, how many are left, and the date you should plan to replace them. It saves your shoes in your browser, so you can come back any time to check in.
Running Shoe Replacement Calculator
Find out how many miles are on your shoes and when to replace them.
How Many Miles Do Running Shoes Last?
The 300–500 mile rule comes from decades of testing on how running shoe foam compresses. A few studies are worth knowing about:
- A 2017 study by Cornwall and colleagues found cushioning dropped by 16% to 33% after about 400 miles, and the runners in the study couldn’t reliably feel the difference.
- An older study by Cook and colleagues (1985) found shock absorption fell noticeably after 100–150 miles and kept declining, with roughly a 30% loss by 500 miles.
- A 2010 study by Wang and colleagues found a smaller but still significant drop after about 300 miles of real-world running.
The takeaway: your shoes lose cushioning gradually, and you probably won’t notice it happening. That’s why tracking mileage is more reliable than waiting for your shoes to “feel” worn out.
Typical lifespan by shoe type
- Daily trainers (Brooks Ghost, Hoka Clifton): 400–500 miles
- Stability shoes (Brooks Adrenaline GTS, Hoka Arahi): 350–500 miles
- Max-cushion shoes (Hoka Bondi, Brooks Glycerin): 400–500 miles
- Lightweight and racing shoes, including carbon-plated “super shoes”: 200–350 miles
- Trail shoes: 300–500 miles, depending heavily on terrain
Why Replacing Your Shoes Matters More With Flat Feet
A stability shoe works by using firmer foam, guide rails, or a frame on the inside of the shoe to slow down how far your arch collapses with each step. As that foam compresses, the support fades along with the cushioning. A worn stability shoe can end up offering little more support than a neutral one.
If you notice old aches coming back, like arch pain, shin splints, sore knees, or heel pain, and your shoes are past 300 miles, worn-out shoes are a likely suspect. For more on choosing support, see our guide to the best Hoka shoes for flat feet.
7 Signs It’s Time to Replace Your Running Shoes
- You’ve passed 400 miles. Even if they look fine, the foam has likely lost a big chunk of its cushioning.
- The outsole is worn smooth. Bald spots on the heel or forefoot mean less grip and uneven wear that can change how your foot lands.
- The midsole has deep creases. Wrinkles and compression lines in the foam, especially along the inside of the heel, are a sign it’s packed down.
- The shoe tilts when you set it on a table. If the heel leans inward or outward, the foam has compressed unevenly. This is common with overpronators.
- The heel counter is soft or collapsed. Squeeze the back of the heel. If it folds easily, it’s no longer holding your foot in place.
- New aches and pains. Soreness in your arches, shins, or knees that wasn’t there before often shows up before the shoe looks worn.
- A new pair feels dramatically better. Try on the same model in a store. If the new one feels much bouncier, your old pair is done.
What Affects How Long Your Running Shoes Last?
Body weight
Heavier runners compress foam faster. If you weigh more than about 180 pounds, plan on the lower end of the mileage range.
Running form
Heel strikers tend to wear out the back of the shoe first, while overpronators break down the inside of the midsole. Both shorten the life of the shoe.
Surface
Asphalt and concrete wear down outsoles faster than trails, grass, or a track. Treadmill miles are usually the easiest on shoes.
Shoe design
Lightweight shoes save weight by using less rubber and softer foam, so they wear out sooner. Shoes with full rubber outsoles and firmer foam last longer.
How to Make Your Running Shoes Last Longer
- Only run in your running shoes. Wearing them for errands or work adds miles you’re not tracking.
- Rotate two pairs. Alternating shoes lets you use the right shoe for each run and spreads the wear out.
- Untie them every time. Kicking them off with the laces tied breaks down the heel counter.
- Air dry them. Never put running shoes in the dryer or next to a heater. Heat damages foam and glue. Stuff them with newspaper if they’re wet.
- Keep them out of hot cars. High heat can warp the midsole.
What to Buy When It’s Time to Replace Them
If your current shoes have been working, the simplest move is to buy the newest version of the same model. If you have flat feet and you’re shopping for something new, these are good places to start:
- Stability for flat feet: Brooks Adrenaline GTS 26 or Hoka Arahi 8
- Maximum support: Hoka Gaviota 6
- Neutral cushioning: Brooks Ghost 18 or Hoka Clifton 10
- Extra arch support for any shoe: Superfeet insoles
Retired running shoes still have a second life for yard work or walking the dog. Just don’t keep running in them. If you stand all day at work, see our picks for the best work shoes for flat feet.
FAQ
How often should I replace running shoes if I run 20 miles a week?
At 20 miles a week, a typical 400-mile daily trainer lasts about 20 weeks, or roughly 5 months.
Do running shoes expire if you don’t use them?
Foam slowly breaks down over time even in a box, but unworn shoes are usually fine for a few years if they’re stored somewhere cool and dry.
Can I just replace the insoles instead?
New insoles add comfort and arch support, but they can’t restore a compressed midsole. If the midsole is worn out, you need new shoes.
Should walking shoes be replaced as often?
Walking is lower impact, so walking shoes often last a bit longer, around 500 miles or 6–12 months of daily use. If you wear them for long shifts on your feet, replace them sooner.
