Running Tool

VDOT Calculator

Q: What is VDOT in running?

VDOT is a running fitness measure by Jack Daniels derived from race performance. It represents an equivalent VO2max and unifies fitness across all distances.

Q: How is VDOT calculated?

From race time and distance using the Jack Daniels formula, solving for VO2max equivalent at the sustainable percentage used over that race duration.

Q: What is a good VDOT score?

75+ = Elite. 60-75 = Sub-elite. 50-60 = Advanced. 40-50 = Intermediate. 30-40 = Recreational. Most recreational runners score 35-55.

Q: How do I use VDOT for training paces?

5 zones: Easy (59% VO2max), Marathon (75%), Threshold/Tempo (83%), Interval/5K pace (100%), Repetitions (>100%). Each targets different physiological adaptations.

Q: Which race gives the most accurate VDOT?

5K-10K races give most reliable results. Marathon VDOT can be skewed by weather, fueling, and pacing errors.

Q: How often should I recalculate my VDOT?

After each significant race or every 6-12 weeks of training. Newer runners may improve 1-3 points per 8-12 weeks.

Q: What is the difference between VDOT and VO2max?

VO2max is lab-measured oxygen uptake. VDOT is race-derived equivalent. They correlate strongly but VDOT also reflects running economy and pacing skill.

Q: Can I use VDOT for half marathon training?

Yes. Input your best 5K or 10K for accurate half marathon predictions and appropriate training paces.

Calculate your running VDOT from any race result and get personalized training paces plus race time predictions for all distances.

Jack Daniels Formula-9 Race Distances-Training Paces-Race Predictions

Enter Race Result

Race Distance

Finish Time

hrs

min

sec

Your VDOT

38.3

Recreational

Pace/mile

8:03/mi

Pace/km

5:00/km

Race Time Predictions

1500m6:50

Mile7:23

3000m14:33

5K24:59

8K40:56

10K51:51

15K1:19:52

Half Marathon1:54:57

Marathon3:57:43

Training Paces

Easy/Recovery

Conversational pace

11:42/mi

Marathon Pace

Comfortably hard

9:31/mi

Threshold

Comfortably hard, 20-60 min

8:44/mi

Interval (5K)

Hard, 3-5 min reps

7:23/mi

Repetition

Very fast, 1-2 min reps

6:47/mi

VDOT Score Reference Table

VDOT	Level	5K Time	10K Time	Half Marathon	Marathon
80	Elite	13:00	27:00	59:30	2:06
70	Sub-Elite	14:45	30:40	1:07:40	2:21
60	Advanced	17:00	35:25	1:18:00	2:43
50	Intermediate	20:15	42:10	1:32:45	3:14
40	Recreational	25:10	52:25	1:55:25	4:01
30	Beginner	34:00	1:11:00	2:37:00	5:29

Jack Daniels Running Formula and VDOT

Jack Daniels, a physiologist and running coach, developed VDOT as a practical way to assess runners' fitness without a laboratory VO2max test. His insight was that race performance encodes all the relevant physiology - aerobic capacity, running economy, lactate threshold, and race tactics. By using a race time as input, VDOT captures a runner's total running ability.

The most important application of VDOT is defining training paces. Daniels established that each intensity zone - Easy, Marathon, Threshold, Interval, and Repetition - should be run at a specific percentage of the runner's velocity at VO2max. By anchoring all paces to your current VDOT, training intensity is automatically calibrated to your fitness level, preventing both overtraining and undertraining.

Frequently Asked Questions

What is VDOT in running?⌄

VDOT is a measure of running fitness created by Jack Daniels. It represents an equivalent VO2max derived from race performance. A runner who finishes a 5K in 20 minutes has approximately the same VDOT as one who finishes a marathon in 3:30. It's a unified fitness descriptor.

How is VDOT calculated?⌄

VDOT is calculated from your race time and distance using the Jack Daniels formula. It solves for the VO2max that would predict that performance given the percentage of VO2max you can sustain over the race duration. Longer races use a lower percentage of VO2max.

What is a good VDOT score?⌄

Scores above 75 are elite level (world-class runners). 60-75 is sub-elite (competitive club level). 50-60 is advanced recreational. 40-50 is intermediate. 30-40 is recreational. Below 30 is beginner. Most recreational runners are between 35-55.

How do I use VDOT for training paces?⌄

Jack Daniels defines 5 training zones based on VDOT: Easy (59% VO2max), Marathon pace (75%), Threshold/Tempo (83%), Interval/5K pace (~100%), and Repetitions (above 100%). Each zone targets different physiological adaptations.

Which race gives the most accurate VDOT?⌄

Any distance works, but 5K-10K races give the most reliable results because they're long enough to tax your aerobic system but short enough that pacing errors are minimal. Marathon VDOT can be inflated by weather, fueling, and pacing issues.

How often should I recalculate my VDOT?⌄

Recalculate after any significant race (every 6-12 weeks of consistent training). VDOT typically improves 1-3 points per 8-12 weeks of structured training for newer runners, and 0.5-1 point for advanced runners.

Can I use VDOT for half marathon training?⌄

Yes. VDOT is distance-agnostic - it predicts equivalent performance across all distances. Input your best recent 5K or 10K time to get accurate half marathon and marathon race time predictions and appropriate training paces.

What is the difference between VDOT and VO2max?⌄

VO2max is your actual maximal oxygen uptake measured in a lab. VDOT is an equivalent value derived from race performance. They correlate strongly but are not identical - running economy, mental toughness, and pacing affect VDOT beyond pure VO2max.

Related Calculators

DOTS Calculator RPE Calculator Steps to Miles

VDOT

Level

5K Time

10K Time

Half Marathon

Marathon

Elite

13:00

27:00

59:30

2:06

Sub-Elite

14:45

30:40

1:07:40

2:21

Advanced

17:00

35:25

1:18:00

2:43

Intermediate

20:15

42:10

1:32:45

3:14

Recreational

25:10

52:25

1:55:25

4:01

Beginner

34:00

1:11:00

2:37:00

5:29