Your result
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Enter your values, then click Calculate result.How this calculator helps
This VO₂ max calculator implements the original Rockport one-mile walk prediction using a completed test record. It does not ask you to start an exercise test, diagnose fitness or use a target heart rate. The equation connects body mass, age, a published sex coefficient, walk time and finish pulse to a predicted maximal oxygen uptake. Keep the method name visible because a running-test equation, laboratory measurement and wearable estimate are different methods with different assumptions.
How to use it
- 1
Locate a completed and appropriately assessed one-mile walk record.
- 2
Enter kilograms, age and the explicitly named coefficient used by the equation.
- 3
Convert the mile time to decimal minutes and enter the measured finish pulse in beats per minute.
- 4
Click Calculate result, then retain the method and measurement context with the prediction.
Formula and methodology
Predicted VO₂ max = 132.853 − 0.0769 × weight(lb) − 0.3877 × age + 6.315 × sex coefficient − 3.2649 × minutes − 0.1565 × finish heart rate; male coefficient 1, female 0.
The calculator applies the displayed arithmetic to the values entered on this device. It does not silently load a local tax rate, currency conversion or commercial assumption.
Worked calculation example
A recorded test for a 40-year-old adult using the male coefficient, mass 70 kg, completed mile time 15 minutes and finish heart rate 120 beats/minute gives approximately 43.9905 mL/kg/min. The equation uses about 154.3236 lb after converting mass. Multiplying the relative estimate by 70 kg and dividing by 1,000 gives about 3.0793 L/min. These are predictions from the record, not a direct oxygen-consumption measurement.
How to interpret your result
The headline is a predicted relative VO₂ max, not a clinical test result or a fitness grade. A faster walk or a lower finish pulse changes the equation prediction while other terms remain fixed, but that mathematical relationship should not be used to manipulate a recorded test. The absolute estimate is a mass conversion of the same prediction. Compare records only when protocol, measurements and method are consistent.
For different inputs or formulas, use Bpm Calculator; Running Pace Calculator; Resting Energy Calculator.
Related questions this calculator covers
- estimate vo2 max calculator
- vo2 max calculator
- rockport vo2 max calculator
- one mile walk vo2 calculator
Scenario comparison
| Scenario | What it shows |
|---|---|
| Recorded time | adding one minute reduces the prediction by 3.2649 mL/kg/min with other inputs fixed. |
| Recorded finish pulse | adding one beat per minute reduces the prediction by 0.1565. |
| Unit conversion | the relative estimate times kilograms divided by 1,000 gives litres per minute. |
Common mistakes to avoid
- Using a running or non-mile distance record.
- Typing minute:second notation as an ordinary decimal.
- Entering resting or age-predicted maximum heart rate instead of finish pulse.
Convert 70 kg to pounds, substitute every term of the published equation and compare with the worked example. Change only time by one minute to check the 3.2649 difference, then only pulse by one beat to check 0.1565. Review the completed-test protocol and original population limits before interpreting a prediction. A laboratory assessment is a different measurement method.
Authoritative reference. Method reference checked for this worksheet. The calculation and examples are independently implemented; read the specific scope and units above.What can affect the result?
Use an existing suitable test record
The calculation requires an already completed one-mile walk performed under an appropriate protocol. It does not provide exercise clearance or instructions to exert yourself. A person with symptoms, medical concerns or an uncertain testing context should discuss suitability with a qualified clinician rather than treating calculator availability as permission to perform a test. Do not substitute a run, a short walk or an arbitrary daily activity record.
Original adult population matters
The original Kline and colleagues study evaluated healthy adults aged 30 to 69. The interface restricts age to that range rather than extrapolating into children or older populations. A group-derived prediction does not establish individual accuracy. Health conditions, medications affecting pulse, altered walking mechanics and protocol differences can make the relationship inappropriate even when age is within the allowed interval.
Time is decimal minutes for one mile
Enter the time for the full measured mile, not minutes per kilometre or a split for another distance. Fifteen minutes and thirty seconds equals 15.5 decimal minutes; it is not 15.30. The interval accepted by the interface is 5 to 40 minutes as a data-entry guardrail, not a validated protocol range for every participant. Confirm the recorded distance and timing precision before calculating.
Finish heart rate is a measured input
Use the pulse associated with the test’s finish record, expressed in beats per minute. It is not resting heart rate, age-predicted maximum or a chosen training-zone value. Timing delays and measurement technique can affect the estimate. The interface accepts 40 to 220 as a broad record check, but an accepted number is not a finding that a pulse is safe or expected for the individual.
The equation uses pounds internally
The mass field is in kilograms and the calculation converts with exactly 0.45359237 kg per pound. Do not enter a pound value into that kilogram field. The published equation also uses a binary sex coefficient; the selector labels that model input explicitly and does not infer individual physiological suitability. A plausible numeric record can still be outside the model’s appropriate application.
Relative and absolute estimates
The main output is oxygen uptake per kilogram of body mass per minute. The secondary value multiplies by entered body mass to express predicted litres per minute. It is the same estimate in another form and is not an independent validation. The calculator rejects nonpositive predictions or predictions above 100 mL/kg/min as suspicious records for review. That guardrail is not a diagnosis or a substitute for laboratory assessment.
Privacy and browser processing
Values entered on this page are processed in the current browser session. SolvePilot does not require an account and does not receive the values entered into the calculator. Refreshing or closing the page clears the working values unless the browser itself restores a previous session. Avoid entering identifying or account information because the calculation needs summary values only.
Accuracy and verification
Accuracy depends first on input quality. Confirm definitions, scales, dates and source information before entering a value. Keep an independent record of any result used for planning because this page does not create an official statement or retain a calculation history.
Limits of this estimate
Use only the disclosed input domains and model. Using a running or non-mile distance record. Review the method-specific boundaries above and the linked source before interpreting a result. Calculations use browser floating-point arithmetic; displayed digits are not a measure of real-world certainty. Your entries stay on this device and are not submitted to a calculation server.
Sources and review information
Frequently asked questions
Is this a direct VO₂ max measurement?＋
No. It is a regression prediction from a completed walk record.
Can I use a running time?＋
No. The implemented method is the original one-mile walk equation.
Should I enter resting heart rate?＋
No. It requires the heart rate recorded at the test finish.
Why is age limited to 30–69?＋
That is the healthy adult age range reported in the original study.
Does the result assign a fitness grade?＋
No. No fitness classification, treatment or training recommendation is inferred.