Race time predictor: 100m to marathon

Predict your race times from 100m to marathon. Enter your results and get predictions using Riegel, VDOT and critical speed models. 100% free.

Popular tools

• Predict 100m Time From 60m
• Predict 400m Time From 200m
• Predict 1600m Time From 800m
• Race Time Predictor
• Free 5K Time Predictor
• Free 10K Time Predictor
• Half Marathon Time Predictor
• Marathon Time Predictor
• Running Pace Calculator
• VDOT Running Calculator

Guides

• How to Improve Your 5K Time: A Science-Backed Training Guide
• From 10K to Marathon: How to Build Distance Without Getting Injured
• What Is VDOT? The Runner's Guide to Jack Daniels' Fitness Score
• Interval Training for Runners: 5 Proven Workouts That Build Speed
• Building Aerobic Endurance: The 80/20 Guide for Runners
• Running Economy Explained: Small Changes That Make You Faster