Are inputs saved?
Inputs are calculated in your browser and are not sent to a server. When you use sharing, the reproducible URL includes the current conditions.
Fitness
VO2max Estimator
Estimate VO2max from a run result and heart-rate inputs.
Updated: May 15, 2026
Input
Estimate VO2max from a run result and heart-rate inputs.
Estimate only, not a lab value. The run-based estimate assumes a near all-out effort. Grade, heat, fatigue, measurement error, conditions, and medication are excluded.
Result
46
VO2max estimate
43.5
Run-based
48.5
HR-based
12 km/h
Speed
Use this as a guide and adjust for your real conditions.
Share this tool
How to use
- Enter Distance, Time, Heart rate.
- Check the estimate in the result area.
- Share a reproducible URL if needed.
How to read the result
- Read VO2max estimate, Speed as quick decision-making estimates.
- Do not treat the result as a fixed answer; adjust assumptions to see the range when needed.
Useful tips
- Useful when you want to track rough fitness changes; adjust inputs to compare scenarios.
- Useful when you want to estimate from a recent run and heart rate; adjust inputs to compare scenarios.
- Use results as training guides and adjust for condition, heat, surface, and fatigue.
- If the result feels too demanding, reduce distance, intensity, or duration and recalculate.
Calculation
The tool calculates training estimates from distance, time, and heart-rate inputs.
Notes
- Adjust for your condition and environment.
- This is not medical or coaching advice.
- Stop exercising if you feel pain or discomfort.
Related tools
See more mini tools- Running Pace Calculator Fitness Calculate pace per kilometer from distance and time.
- Walking Time Calculator Fitness Estimate walking time from distance and walking speed.
- Heart Rate Zone Calculator Fitness Estimate training zones from maximum heart rate.
- Race Time Predictor Fitness Estimate race times for another distance from a recent result.
FAQ
Are results exact?
Use results as everyday estimates. For exact decisions, confirm with official or specialized sources.
TooToTools
Use more mini tools
Check quick kitchen, money, fitness, music, and time utilities in your browser.