VDOT Calculator
Enter a recent race result to find your VDOT — Jack Daniels’ measure of running fitness — and the five training paces that go with it. VDOT turns one race into an entire training plan: easy, marathon, threshold, interval, and repetition paces calibrated to your current fitness.
Enter a recent race time to estimate your VDOT and training paces.
About VDOT
VDOT is a measure of running fitness developed by coach Jack Daniels. It represents your current "effective VO2max" — not a lab test, but an estimate derived from a recent race performance. A higher VDOT means greater running fitness.
Each VDOT value maps to five training pace zones:
- Easy — most of your weekly mileage; builds aerobic base without excess fatigue
- Marathon — goal marathon pace; used for marathon-specific long runs
- Threshold — comfortably hard; improves lactate clearance (tempo runs, cruise intervals)
- Interval — hard 3–5 minute repeats; builds VO2max
- Repetition — short, fast repeats (200–400m); improves speed and running economy
Use your most recent race for the most accurate VDOT. Fitness changes over time, so re-test after a training cycle. The table covers VDOT 30–85, which spans roughly a 6-hour marathon to a sub-2:10 marathon.
VDOT Calculator FAQ
What is a VDOT calculator?
A VDOT calculator estimates your running fitness from a recent race result and converts it into training paces. VDOT, developed by coach Jack Daniels, represents your effective VO2max — a single number that captures your current fitness. Enter any race distance and finish time to get your VDOT and five training pace zones.
How is VDOT calculated?
VDOT is derived from the relationship between race time, distance, and oxygen cost of running. The calculator looks up your performance in Jack Daniels' VDOT tables (covering VDOT 30 to 85) and returns the matching fitness value plus the corresponding easy, marathon, threshold, interval, and repetition paces.
What are the five VDOT training paces?
Easy pace builds your aerobic base and makes up most weekly mileage. Marathon pace is your goal race pace for marathon-specific long runs. Threshold (tempo) pace is comfortably hard and improves lactate clearance. Interval pace is hard 3-5 minute repeats that build VO2max. Repetition pace is short, fast repeats that sharpen speed and running economy.
What race time should I use for VDOT?
Use your most recent all-out race, ideally within the last few weeks and at 5K or longer for the most reliable estimate. Fitness changes with training, so recalculate after each training block. A race that felt evenly paced and complete gives a better VDOT than a workout or a race you faded badly in.
Is a higher VDOT better?
Yes — a higher VDOT means greater running fitness. Elite marathoners run at a VDOT above 70, while a VDOT of 30-40 is typical for newer runners. Improving your VDOT by even a few points reflects a meaningful jump in race performance across every distance.