Running Calculators
Tools to help you train smarter and understand your running performance
Pace Calculator
Convert between pace, speed, distance, and time. Calculate your running pace or predict finish times for any distance.
Race Time Predictor
Predict your performance at different distances based on a recent race result. Plan your next race goal with accuracy.
Race Planning
Create your race pacing strategy with kilometer splits, elevation adjustments, and negative/positive split options.
Grade Adjusted Pace
Calculate your equivalent flat-ground pace when running uphill or downhill. Understand the true effort of hill running.
Wind Adjustment
Estimate how headwinds and tailwinds affect your running pace and race times. Plan for windy conditions.
Heat & Humidity
Adjust your running pace for hot and humid conditions. Understand heat stress and train safely in warm weather.
Why Use These Calculators?
I designed these calculators to help runners of all levels better understand their training and racing. Whether you're planning your race, training on hills, or dealing with hot conditions, these tools provide the insights you need to train effectively and race smart. All calculators are scientifically valid, based on peer-reviewed research, established formulas, and real-world biomechanical principles.
I've worked over 100+ hours to bring these calculators to life by combining my degree, coaching knowledge and a lot of reading and research! They are free to use but if you would like to support my mission for the constant improvement of these you can buy me a coffee (or two) here!