Running Tools

Free calculators and utilities to help you plan your training, analyze your performance, and reach your running goals.

Calculate your running pace, time, or distance. Plan your splits for any race goal.

Predict your race performance based on recent results. Uses the Riegel formula.

Estimate your aerobic capacity (VO2 Max) based on your recent race times.

Calculate your heart rate and pace zones for optimal training intensity.

Estimate energy expenditure for your runs based on weight, distance, and pace.

What To Do Next

Use your calculator results to pick a plan, follow a program, or build a custom AI schedule.

Browse real AI-generated training plans to see what you'll get.

Structured programs for common race distances and goals.

Generate a personalized plan based on your fitness and goals.

Our AI creates custom running plans adapted to your fitness level, schedule, and goals.