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Race faster.

Pace calculators, race predictors, and training tools for runners, cyclists, swimmers, and triathletes.

Open pace calculator Triathlon calculator
🏃 Running 🚴 Cycling 🚶 Walking 🏊 Swimming 🏅 Triathlon

Tools

Everything you need

Free calculators built for serious athletes. No ads in the way, no account required.

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Live
Pace Calculator
Calculate pace, time, distance, and speed. Enter any two values and get the rest instantly.
Running Cycling Walking Swimming
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Triathlon Calculator
Predict your finish time from split paces — or reverse-engineer the paces you need to hit a goal time.
Sprint Olympic 70.3 Ironman
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Race Predictor
Give us a recent race result and we'll predict your finish times at every standard distance using the Riegel formula.
Running Cycling
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Split Calculator
Enter a goal time and get even, negative, or positive splits — a full mile-by-mile table to take to race day.
Running Cycling
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Race Planner
Upload a course GPX file and get a mile-by-mile race plan based on elevation and grade-adjusted pace.
Running Trail Any course
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Coming soon
Training Zones
Find your easy, tempo, threshold, and VO₂ max pace zones based on a recent race or time trial.
Running Cycling
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Free, always
Every tool on this site is free to use. No paywalls, no trial periods, no account required.
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Sports covered
Running, cycling, walking, swimming — and triathlon tools that handle all three legs at once.
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Signups needed
Open a tool, enter your numbers, get your answer. Nothing to install, no email required.

By sport

Jump straight in

Go directly to the calculator configured for your sport.

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Running
Pace per mile or km, race distances from 5K to marathon, treadmill conversions.
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Cycling
Speed in mph/kph, ride distances from 10 miles to a century.
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Walking
Casual stroll to power walk — pace, time, and distance for every level.
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Swimming
Pace per 100m or 100yd, pool to open water distances, triathlon swim splits.