VDOT is a number developed by legendary running coach Jack Daniels, PhD, to represent your current running fitness. Unlike a lab-measured VO2 max, VDOT is derived from race performance — it's a practical measure of how fast you can run that accounts for both aerobic capacity and running economy.
The name comes from the notation V̇O2 (the dot over V indicates a rate), but Daniels uses it as a single number from 30 (beginner) to 85+ (elite) that captures everything relevant to your race performance. Two runners with the same VDOT will perform equally across all distances.
VDOT is the cornerstone of Daniels' Running Formula, one of the most scientifically respected training systems in endurance sports. It's used by coaches worldwide to prescribe individualized training paces.
The calculation uses the oxygen cost equation for running: VO2 = -4.60 + 0.182258 × v + 0.000104 × v², where v is speed in meters per minute. This gives the oxygen demand at a given speed.
The fraction of VO2max used during the race (%VO2max) is estimated by: 0.8 + 0.1894393 × e^(-0.012778 × t) + 0.2989558 × e^(-0.1932605 × t), where t is race duration in minutes.
Your VDOT = VO2 / %VO2max. The result reflects the maximal oxygen uptake at which you could theoretically run — your aerobic ceiling for running performance.
This is why a VDOT derived from a 5K and one from a marathon give the same result for well-trained runners. The formula accounts for the different %VO2max fractions used at different race distances.
Once you know your VDOT, Daniels' system prescribes five training intensities, each targeting different physiological adaptations:
Here are reference VDOT values with equivalent race times to help you interpret your score:
Most adult recreational runners fall between VDOT 35–55. A 20:00 5K gives you a VDOT of about 45. A 60-minute 10K corresponds to roughly VDOT 33. Training consistently for 1–2 years can realistically move a beginner from VDOT 35 to 45.
The most effective way to use your VDOT score is to structure weekly training across the five zones. Daniels recommends the following distribution for most runners: 70–80% of weekly mileage at Easy pace, with the remainder split between quality workouts at T, I, and R paces.
Update your VDOT every 4–8 weeks using a recent race result or time trial. As your fitness improves, your VDOT rises and your prescribed training paces will be faster. Don't chase training paces from an aspirational VDOT — train at your current level and let the fitness build.
Common mistake: running Easy pace too fast. Most runners run their easy miles 30–60 seconds per km faster than prescribed. This reduces the training benefit and increases injury risk. Trust the zones.
Your VDOT will typically be slightly lower than a lab VO2 max test because lab tests measure capacity under ideal conditions, while VDOT reflects performance including economy, fatigue resistance, and mental factors. However, for training purposes, VDOT is more useful because it's performance-derived.
A lab VO2 max of 60 ml/kg/min doesn't tell you what pace to run your intervals. VDOT 60 tells you exactly that. This practical focus is why coaches worldwide prefer the VDOT system for prescribing training intensities.
The following table provides complete training paces for each VDOT value from 30 to 75. These are derived directly from Jack Daniels' Running Formula tables and represent the optimal paces for each training intensity zone:
| VDOT | Easy/km | Tempo/km | Interval/km | Rep 400m | Equiv. 5K |
|---|---|---|---|---|---|
| 30 | 8:00–8:40 | 6:15 | 5:33 | 2:12 | 30:40 |
| 35 | 7:20–7:55 | 5:37 | 4:59 | 1:59 | 27:39 |
| 40 | 6:45–7:20 | 5:06 | 4:31 | 1:48 | 24:08 |
| 45 | 6:15–6:50 | 4:40 | 4:08 | 1:38 | 22:10 |
| 50 | 5:55–6:25 | 4:19 | 3:50 | 1:31 | 20:24 |
| 55 | 5:35–6:05 | 4:02 | 3:35 | 1:25 | 18:57 |
| 60 | 5:17–5:47 | 3:47 | 3:22 | 1:20 | 17:44 |
| 65 | 5:01–5:30 | 3:35 | 3:10 | 1:15 | 16:37 |
| 70 | 4:47–5:14 | 3:25 | 3:00 | 1:11 | 15:42 |
| 75 | 4:34–4:59 | 3:15 | 2:51 | 1:07 | 14:53 |
Easy pace range: the lower end is brisk easy running; the upper end is a recovery jog. Use the full range depending on your energy level on a given day. The key is staying comfortably conversational throughout easy runs regardless of where in the range you fall.
Jack Daniels' training system uses VDOT-based phases that build on each other throughout a competitive season. Understanding how to periodize training with VDOT makes the difference between average improvement and breakthrough performances:
After the race season, update your VDOT from your best performance and begin the next cycle at your new (hopefully higher) VDOT value. Consistent training across multiple seasons is how VDOT improves from 40 to 50 to 60 over years of dedicated running.
"Setting training paces from a current performance level is essential to achieving optimal physiological adaptations. Training at intensities matched to your current fitness — using tools like VDOT — ensures that each workout delivers the intended physiological benefit."
A "good" VDOT depends on your goals and age. Here's a practical guide: VDOT 35–40 is a solid beginner/recreational level (4:15–3:50 marathon). VDOT 45–50 is competitive recreational, often near Boston Qualifying times for many age groups (3:27–3:10 marathon). VDOT 55–60 is strong sub-elite, equating to a sub-3 hour marathon or sub-18 5K. VDOT 65+ is elite / national class level. For most adult runners training 3–5 days per week, VDOT 40–50 is an achievable and meaningful goal. A VDOT of 50 (3:10 marathon, 18:10 5K) places you in roughly the top 25% of recreational runners.
Use a recent race where you ran your best effort over the full distance. A 5K, 10K, half marathon, or marathon all work well. The race should have been run under normal conditions (no extreme heat, injury, etc.) within the last 8–12 weeks.
Small differences (±1–2 VDOT points) between distances are normal and reflect individual strengths. If your 5K gives a much higher VDOT than your marathon, you may lack long-distance endurance. Use the most recent high-quality race result.
Recalculate after every significant race or time trial. Most runners update every 4–8 weeks during training cycles. Avoid recalculating after a bad race — use your best recent performance.
VDOT is most accurate for 1500m to marathon distances. For ultras, factors like terrain, heat management, and nutrition become dominant, making pure VO2max-based formulas less reliable.
VDOT 50 is a solid recreational/competitive level. It corresponds roughly to a 40-minute 10K, 1:28 half marathon, or 3:05 marathon. It's above average for age-group runners and shows consistent training.
Most recreational runners benefit from focusing on Easy, Threshold, and Interval work. Rep pace work is most valuable for 5K/10K specialists. Marathon-focused runners use mostly E and M paces with some T work.
vVO2max is the speed at which you reach your VO2 maximum — the minimum speed at which your maximum aerobic capacity is fully utilized. Interval training is typically done at or near this speed.
Use the Daniels & Gilbert equations: calculate VO2 demand at your race velocity (VO2 = -4.60 + 0.182258v + 0.000104v² where v is meters/min), then calculate the %VO2max fraction at your race duration. VDOT = VO2/%. Our calculator does this automatically — enter your race time and distance.
Yes, but it must be an all-out maximal effort over a known distance. A controlled training run won't give an accurate VDOT — you need genuine race effort. A time trial (run solo at maximum sustainable effort for 5K or 10K) works well if you can't access a race. Time trials typically produce VDOT values 1–3 points lower than race conditions due to missing competitive atmosphere.
Use this Jack Daniels VDOT table to look up your score from any race distance, or find equivalent race times across distances. This is the official VDOT reference chart derived from Daniels' Running Formula.
| VDOT | 1 Mile | 5K | 10K | Half Marathon | Marathon | Level |
|---|---|---|---|---|---|---|
| 30 | 9:11 | 28:00 | 58:09 | 2:07:16 | 4:49:17 | Beginner |
| 35 | 8:06 | 24:45 | 51:22 | 1:52:09 | 4:14:59 | Beginner |
| 40 | 7:13 | 22:03 | 45:49 | 1:40:07 | 3:49:45 | Recreational |
| 45 | 6:31 | 19:53 | 41:16 | 1:30:09 | 3:26:46 | Recreational |
| 50 | 5:59 | 18:10 | 37:41 | 1:22:39 | 3:09:59 | Competitive |
| 55 | 5:31 | 16:46 | 34:47 | 1:16:25 | 2:55:54 | Competitive |
| 60 | 5:08 | 15:37 | 32:24 | 1:11:20 | 2:44:14 | Sub-Elite |
| 65 | 4:49 | 14:37 | 30:20 | 1:06:53 | 2:34:23 | Sub-Elite |
| 70 | 4:33 | 13:47 | 28:38 | 1:03:00 | 2:25:57 | Elite |
| 75 | 4:18 | 13:03 | 27:05 | 0:59:32 | 2:18:38 | Elite |
| 80 | 4:06 | 12:26 | 25:50 | 0:56:25 | 2:12:10 | World Class |
| 85 | 3:55 | 11:53 | 24:41 | 0:53:38 | 2:06:22 | World Class |
How to use this table: Find your most recent race result in the matching distance column. The VDOT row is your score. Then enter it (or your race time) into the calculator above to get your personalized training paces.
Wondering how your VDOT ranks among runners? Here are VDOT percentile benchmarks for adult recreational runners based on race result distributions:
| VDOT | Equiv. 5K | Equiv. Marathon | Approx. Percentile | Category |
|---|---|---|---|---|
| 30–34 | 28:00–31:00 | 4:15–4:50 | Bottom 15% | New runner / returning |
| 35–39 | 24:45–27:39 | 3:50–4:15 | 15–35% | Recreational beginner |
| 40–44 | 22:03–24:08 | 3:27–3:50 | 35–55% | Recreational runner |
| 45–49 | 19:53–22:10 | 3:10–3:27 | 55–75% | Regular age-grouper |
| 50–54 | 18:10–20:24 | 2:56–3:10 | 75–88% | Competitive age-grouper |
| 55–59 | 16:46–18:57 | 2:44–2:56 | 88–95% | Strong age-grouper |
| 60–64 | 15:37–17:44 | 2:34–2:44 | 95–98% | Sub-elite |
| 65+ | Under 15:37 | Under 2:34 | Top 2% | Elite / national class |
Most runners who train 3–5 days per week for 1+ years land between VDOT 40–55. If you're just starting out, VDOT 30–38 is completely normal. With consistent training, expect to gain 3–5 VDOT points per year early on, with gains slowing as you approach your genetic ceiling.
The Jack Daniels VDOT formula is based on the mathematical relationship between running velocity and oxygen demand. For runners who want to understand the math behind this calculator:
Step 1 — Calculate VO₂ demand at race velocity:
VO₂ = −4.60 + 0.182258 × v + 0.000104 × v²
Where v is velocity in meters per minute.
Step 2 — Estimate %VO₂max at your race duration:
%VO₂max = 0.8 + 0.1894393 × e^(−0.012778 × t) + 0.2989558 × e^(−0.1932605 × t)
Where t is race duration in minutes. This function reflects that you run a 5-minute mile at a higher %VO₂max than you maintain for a 2-hour marathon.
Step 3 — Calculate VDOT:
VDOT = VO₂ ÷ %VO₂max
Training paces are then derived by solving for the velocity at each prescribed %VO₂max intensity. For example, Easy pace targets 65–79% of VDOT's equivalent VO₂max.
This is the same formula used in the official Daniels' Running Formula book (3rd edition, Human Kinetics). Our VDOT calculator applies it automatically — no manual calculation needed.