Run performance planning

VDOT Running Calculator

Turn a recent run result into useful training paces, track splits, equivalent performances, and triathlon-aware run planning.

Quick Presets

Recent Race Input

Use a recent all-out result that reflects current fitness.

Race Distance

Race Time

Hours

Minutes

Seconds

Current entry: 25:00

Display Preferences

Flip pace output between metric and imperial without changing the underlying VDOT.

VDOT is built from a fresh run result. The triathlon card on the right adds a separate off-the-bike planning lens, and the conditions layer keeps heat and altitude explicit instead of hidden.

Advanced Planning Conditions

Adjust pace targets for hot or high conditions without changing the underlying VDOT score.

Temperature (°C)

Use expected workout or race temperature, not ideal conditions.

Altitude (m)

Use venue altitude if you want hot/high planning to reflect race day.

Temperate / sea-level baseline

Current conditions are close to a temperate sea-level planning baseline, so no extra pace adjustment is being added.

Input Quality Check

Use a recent race or honest time trial, ideally from the last 4-6 weeks.

Prefer a flat or normal course over downhill-assisted times.

Use current fitness, not a goal time or an old peak result.

Treat heat, altitude, and bike fatigue as context layers, not hidden assumptions.

Run VDOT Summary

Daniels-style equivalent-performance model with practical pace anchors, track splits, and triathlon-aware interpretation.

VDOT

38.3

Effective race-derived running fitness, not a lab VO2 guarantee.

Performance Band

Recreational

Consistent runner building range and durability

Recent Race

25:00

Anchor Pace

5:00/km

Current race pace from the result you entered.

This calculator separates what is model-based confidence from what is coaching context. Equivalent race times come from a Daniels-style solver; triathlon pacing and hot/high adjustments below are shown as heuristic planning support.

Training Paces

Fresh-run pace anchors plus actionable track splits where athletes actually need them.

Easy / Long Run

Most aerobic running, warm-ups, cool-downs, and steady volume.

5:45/km - 6:20/km

Use the slower end on tired weeksStay conversational

Marathon Pace

Useful as a steady endurance anchor, even if you are not marathon training.

5:38/km

5K split 28:12

Threshold / Tempo

Roughly one-hour race effort. The best all-around anchor for tempo sessions.

5:14/km

1K 5:141 mi 8:25

Interval

VO2-oriented work for 3-5 minute reps. Track splits matter here.

4:26/km

400m 1:46800m 3:33

Repetition

Fast relaxed running for mechanics and economy, not exhaustive suffering.

4:36/km

200m 0:55400m 1:50

Interval and repetition paces are most useful when the effort, recovery, and rep length match the workout design. Treat them as anchors, not dares.

Conditions-Adjusted Planning

Broad pace guidance for the temperature and altitude you entered. This does not change the underlying VDOT score.

Environment

Temperate / sea-level baseline

12°C and 0 m

Adjusted Anchor Pace

5:00/km

Roughly 0.0% slower than temperate sea-level pacing.

Adjusted Easy Range

5:45/km - 6:20/km

Use the slower end when fatigue, dehydration, or altitude stress is building.

Adjusted Threshold

5:14/km

Keep threshold work honest instead of forcing temperate-day pace in heat or altitude.

Heat adds about 0.0% and altitude adds about 0.0% to pace targets here. Combined, that is roughly 0.0% slower pacing unless you are well acclimated.

Equivalent Performances

Equivalent fresh-run performances at other distances using the same VDOT.

Mile

7:21

4:36/km

25:00

5:00/km

Anchor input

10K

51:54

5:11/km

Half Marathon

1:55:05

5:27/km

Marathon

3:57:58

5:38/km

Triathlon Run Context

Heuristic off-the-bike planning ranges. Useful, but intentionally separate from the fresh-run VDOT model above.

Sprint triathlon 5K

Fresh equivalent: 25:00 (5:00/km)

Off-bike planning range: 25:45 - 26:30

Planning pace range: 5:09/km - 5:18/km

Shorter run, but still sensitive to how hard you ride the bike leg.

Olympic triathlon 10K

Fresh equivalent: 51:54 (5:11/km)

Off-bike planning range: 54:30 - 56:03

Planning pace range: 5:27/km - 5:36/km

Bike pacing discipline matters as much as standalone run fitness here.

70.3 run

Fresh equivalent: 1:55:05 (5:27/km)

Off-bike planning range: 2:01:59 - 2:06:36

Planning pace range: 5:47/km - 6:00/km

Fueling, heat, and durability usually matter more than fresh VDOT alone.

Ironman marathon

Fresh equivalent: 3:57:58 (5:38/km)

Off-bike planning range: 4:26:31 - 4:40:48

Planning pace range: 6:19/km - 6:39/km

Use this as a planning range only. Full-distance marathon execution varies massively.

Cycling before the run measurably impairs subsequent running performance in triathlon research. Use these as planning ranges, not as guaranteed race outcomes.

Recommended Run Workouts

Practical sessions built from your current VDOT anchors.

What VDOT Actually Tells You

VDOT is a practical running-performance anchor built from race performance, oxygen cost, and the fraction of VO2max that can be sustained for a given duration.

That makes it useful for turning one honest race result into better training pace anchors. It does not make it a full lab profile or a complete explanation of why one runner is better than another.

Why Different Distances Still Need Judgment

Equivalent race predictions assume the same underlying fitness expression across distances, but real runners drift because of fatigue resistance, fueling, terrain, heat, altitude, and durability.

That is why this page treats race predictions as equivalent fresh-run estimates, then gives triathlon-specific run planning separately instead of pretending they are the same thing.

How Triathletes Should Use VDOT

Use VDOT to set fresh-run training anchors, especially easy, threshold, and track work. Then adjust race-day run expectations for bike pacing, heat, fueling, and the fatigue cost of being a multi-sport athlete.

If your bike execution is too aggressive, your triathlon run is no longer a fresh VDOT problem. It becomes a pacing and durability problem.

What To Enter From A Recent Race

Use a recent all-out run on a reasonably normal course. Avoid downhill-assisted, heat-distorted, or very old results if you want the pace anchors to reflect what you can actually train from now.

If conditions were unusually hot, official VDOT guidance supports adjusting pace expectations rather than pretending the raw race time told the whole story.

Reviewed And Updated

Built to be transparent about method, reviewer, and where the triathlon context starts.

Reviewer

Triathlon Regimen Editorial Team

Research and product review focused on turning published endurance models into practical calculators for self-coached triathletes.

Last reviewed

March 22, 2026

Method scope

Fresh-run VDOT model plus separate heuristic triathlon run-planning layer.

Scientific References

Sources selected to support the actual claims on this page, not to decorate it.

Daniels J. Daniels' Running Formula. Human Kinetics. Canonical VDOT framework and pace philosophy.

Book record

VDOT O2 Support. Making VDOT training paces clear. Official explanation of pace plus rep-time display.

Official support

VDOT O2 News. Updated VDOT paces below 39 for greater accuracy. Useful evidence that pace tables need nuance rather than rigid generic percentages.

Official note

VDOT O2 News. Adjust your training paces for high temperatures. Official heat-adjustment guidance for real-world pacing.

Official heat guidance

Barnes KR, Kilding AE. Running economy: measurement, norms, and determining factors. Sports Medicine.

PubMed

Saunders PU, Pyne DB, Gore CJ. Endurance training at altitude. High Altitude Medicine & Biology.

PubMed

Trewin AJ, et al. Cycling impairs subsequent running performance in triathletes: systematic review and meta-analysis.

PubMed

Related Triathlon Tools

Critical Swim Speed Calculator Bike FTP Calculator Bike TSS Calculator Triathlon Race Time Calculator

Helpful Planning Notes

Heat and altitude

Hard race times from hot or high conditions often understate fitness. Use them cautiously or adjust pace expectations before copying the numbers straight into training.

Track use

Interval and repetition days are where split chips matter most. Use the 200m, 400m, and 800m splits above if GPS pace lags on the track.

Retest rhythm

Most self-coached athletes only need a new anchor every 4-6 weeks or after a clear fitness jump. More frequent testing usually adds noise, not clarity.

Informational tool. This calculator is for personal logging and awareness purposes only. VDOT estimates are derived from race results and are approximations, not clinical fitness assessments. Training paces are general guidelines, not individualized prescriptions. This tool is not a substitute for professional coaching or medical guidance.

Methodology

How this calculator works

Running VDOT and Pacing Methodology

VDOT is valuable because it turns recent race evidence into pace guidance. We use a Daniels-style equivalent-performance model for fresh running, then separate triathlon-specific run heuristics instead of hiding those assumptions.

Tie pace guidance to recent race evidence whenever possible.
Explain the difference between race prediction and training prescription.
Use conservative interpretation for multisport athletes carrying bike fatigue.

FAQ

Frequently asked questions

Should triathletes use VDOT exactly as runners do?

Use the fresh-run framework first, then layer bike fatigue, terrain, heat, and fueling on top before treating the result as a triathlon race target.

How recent should the race result be?

Recent enough to reflect current fitness and clean enough that conditions did not distort the effort too heavily.

Why does the calculator show track splits for interval and repetition paces?

Because runners usually execute faster work by split, not by GPS pace alone. Showing 200m, 400m, and 800m anchors makes the page useful on the track immediately.

Evidence

References

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