Pace Calculator
Solve any of pace, time, or distance from the other two. Live results, every change.
How this calculator works
- VDOT and equivalent training paces
VDOT is a single number that summarizes your aerobic fitness from a recent race performance. Daniels' tables map VDOT to equivalent times at every standard distance and to recommended paces for easy, marathon, threshold, interval, and repetition work. PaceCalc estimates VDOT from your inputs, then surfaces those equivalent paces.
Jack Daniels, Daniels' Running Formula, 3rd edition, Human Kinetics, 2013. Tables for VDOT and zone-based pacing.
- Even-split and negative-split pacing
Pacing the first half of a race no faster than the second half ("even split") or slightly slower ("negative split") consistently outperforms going out hard. PaceCalc surfaces split tables that assume even pacing by default; you can toggle to a negative-split structure where it makes sense.
Empirical analysis of major-marathon finishers consistently shows fastest finishers ran even or slightly negative splits; positive splits correlate with slower finishes. Standard pacing guidance across coaching literature.
- Pace, time, and distance solve a single equation: distance = pace × time. The math is exact; results assume even pacing and no environmental adjustment. Use the Heat & Altitude calculator if conditions differ from race-day.
Frequently asked
- How accurate is the running pace calculator?
- The running pace calculator uses standard mathematical formulas to calculate pace, time, and distance. Results are highly accurate for planning purposes. Actual race performance may vary based on fitness level, weather conditions, terrain, and other factors.
- What's the difference between pace per kilometer and pace per mile?
- Pace per kilometer shows how many minutes it takes to run 1 kilometer, while pace per mile shows minutes per mile. To convert: multiply km pace by 1.609 to get mile pace, or divide mile pace by 1.609 to get km pace.
- How do I use the pace calculator for race planning?
- Enter your target race distance and either your desired finish time or your comfortable pace. The calculator will show the other value, helping you plan realistic race goals. You can also use it to determine split times for different race segments.
- Can I use this calculator for track workouts?
- Yes! Enter standard track distances (400m, 800m, 1500m, etc.) or use custom distances. The calculator works for any distance from sprints to ultra-marathons.
- Does the calculator account for elevation changes?
- The basic running calculator uses flat-course calculations. For courses with significant elevation, use our Heat & Altitude Calculator or race-specific calculators (like NYC Marathon) which include elevation profiles.