How to Use the Running Shoe Calculator
Enter your shoe type, total miles logged, and average weekly mileage to calculate remaining shoe lifespan and your recommended replacement date.
Shoe Replacement Guidelines
Most road running shoes last 300–500 miles; trail shoes typically 250–350 miles. Factors like body weight, gait, and surface type can shorten lifespan. Check the midsole compression and outsole wear patterns regularly.
Signs It Is Time to Replace Your Shoes
Uneven outsole wear, increased soreness in feet, knees, or lower back after runs, and midsole foam that no longer bounces back under finger pressure are clear replacement signals.
Frequently Asked Questions
Heavier body weight, running on concrete vs. asphalt, overpronation, and high weekly mileage all accelerate wear.
Degraded cushioning transfers more impact to your feet, knees, and hips — increasing risk of stress fractures, runner's knee, and plantar fasciitis.
Rotating between 2–3 pairs lets the foam decompress and recover between runs. Hand-wash instead of machine wash, and store away from heat and sunlight.