Every runner's training calculator
VDOT training zones, race predictions, pace math, and split plans — all in one beautiful app. No subscription. No account. No internet required.
Find Your Training Zones
Enter any race result and instantly see your VDOT score with five science-backed training zones — Easy, Marathon, Threshold, Interval, and Repetition.
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Predict Race Times at Every Distance
From 1500m to the marathon — see your predicted finish times at every standard distance based on your current fitness level.
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Solve Pace, Time, or Distance
A three-field calculator that solves for whichever variable you need — enter any two and get the third instantly.
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Build Your Race-Day Split Plan
Generate a split-by-split race plan with your target pace and distance. Know exactly what every mile should look like.
Learn more →Why Pacesmith
$1.99 Once. Forever.
No subscription. No ads. No nags.
Works Offline
Zero network calls. All math runs on your device.
No Account Required
No sign-up, no tracking, no data collection.