Your running calculation tools

Pace Calculator

Instantly convert time, distance and speed. Get your pace in km/h, min/km or m/s.

Main Tool

Race Time Predictor

Predict your times for all distances (5km, 10km, half, marathon) from a recent performance.

Popular

VO2max Calculator

Estimate your maximum oxygen uptake with Daniels formula or Cooper test.

Popular MAV

MAV Calculator

Calculate your Maximal Aerobic Velocity with 5 different tests (Léger, Cooper, VAMEVAL).

New

Training Paces

Calculate your training zones according to Jack Daniels (Easy, Marathon, Tempo, Interval, Repetition).

Popular

Calories Burned

Estimate your energy expenditure while running based on weight, distance and pace.

Shoes and Performance

Calculate potential time gains with carbon plate running shoes.

Weight Impact

Calculate the impact of weight variation on your running performance.

 BMI

BMI Calculator

Calculate your BMI and compare it to the population of your age and gender.

New

Max Heart Rate

Estimate your max HR with Fox, Tanaka and Nes formulas. Discover your cardio zones.

Anaerobic Zone

Identify your anaerobic zone and optimize your high-intensity training.

Temperature Impact

Assess the effect of heat, cold and humidity on your performance.

New

Physiological Age

Compare your real age to your body's age with a multi-factor calculation.

New

Combined Events

Calculate your IAAF points for decathlon (men) and heptathlon (women).

New

Running Glossary

Discover all the technical terms of running and their definitions.

New

Arm Swing

Discover the scientific benefit of arm swing: save 3 to 13% energy.

New

Results and Statistics

Paris Marathon 2025
54,917 finishers · April 13, 2025
Paris Half Marathon 2025
47,539 finishers · March 9, 2025
Paris 10km 2025
34,353 finishers · June 9, 2025
NYC Marathon Stats
Historical statistics 1970-2023

Why RunningTimeCalculator?

100% Free

All our tools are free with no registration required. Unlimited access for all runners.

Accurate Calculations

Scientifically validated formulas (Daniels, Riegel, Cooper) for reliable results.

All Levels

From beginner to experienced runner, our tools adapt to your profile and goals.

Data Protected

Your data is secure. Server-side calculations to protect our algorithms.

RunningTimeCalculator: Your Training Companion

RunningTimeCalculator is a free platform dedicated to runners, from beginners to experienced marathoners. Our calculation tools help you plan your training, set your goals and analyze your performance.

Complete Tools for All Your Needs

Whether you're preparing for your first 5K or aiming for a marathon time, our calculators support you:

  • Pace Calculator: Convert time, distance and pace instantly
  • Race Time Prediction: Predict your times for all distances
  • VO2max: Assess your maximum aerobic capacity
  • Training Paces: Determine your zones using Jack Daniels method
  • Condition Impact: Temperature, weight, altitude

Based on Running Science

Our calculators use scientifically validated formulas:

  • Jack Daniels formula for training paces and VO2max
  • Riegel equation for race time prediction
  • Cooper test for VO2max
  • Fox, Tanaka and Nes formulas for heart rate

Race Results and Statistics

View official results and detailed statistics from major races: Paris Marathon, Paris Half Marathon, Paris 10km and NYC Marathon (historical 1970-2023).

Free, No Registration, For Everyone

All our tools are 100% free and require no registration. Our calculations are performed server-side to ensure data security and protection of our proprietary algorithms.