100% Free Running Tools

Run Smarter, Train Better

Free calculators, training plans, and tools designed for runners of all levels. Powered by sports science.

Get Started

Everything You Need to Run Better

Professional-grade tools — completely free

Convert between min/km, min/mile, km/h. Calculate finish times and split tables.

Predict your 5K, 10K, half and full marathon times with VDOT analysis.

Get your personalized easy, tempo, interval, and repetition pace zones.

Generate a custom training plan for your goal race with smart periodization.

Track shoe mileage, get replacement alerts, and daily shoe recommendations.

Real-time weather-based clothing, hydration and pace adjustment guidance.

Explore popular running routes with elevation profiles and water station info.

Estimate calories burned based on your weight, distance, and pace.

Our tools use established running science — Jack Daniels' VDOT, Riegel's formula, and proven training methodologies used by elite coaches worldwide.

Available in English, 한국어, 日本語, 中文, and Español. Running has no borders — neither do our tools.

All tools are completely free. No account needed, no premium plans. Just open and use. Your data stays in your browser.

Fully responsive design works on phone, tablet, and desktop. Use it at the track, on the trail, or at your desk.