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One-Mile Walk Test Calculator (1 mile = 1.6 km, Rockport)

Estimate your VO₂max and cardio-fitness rating from the Rockport one-mile walk test. Enter the distance in miles or kilometres (1 mile = 1.609344 km), your weight in kg or lb, the walk time and your ending heart rate, and read your speed in both mph and km/h.

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Am I Overweight? CalculatorFind out if you're overweight from your BMI, with your healthy weight range and kg to reach it.Am I Underweight? CalculatorFind out if you're underweight from your BMI, with your healthy weight range and kg to reach it.Biological Age CalculatorEstimate your biological age from lifestyle factors — fitness, diet, sleep, stress and more. Educational, not medical.Body Frame Size CalculatorSmall, medium or large frame from your height-to-wrist ratio, with a frame-adjusted weight range.Bra Size CalculatorBand and cup size (US, UK and EU) from your underbust and bust measurements.Child BMI Percentile CalculatorBMI-for-age percentile on the CDC reference, ages 2-20 — the percentile, not the BMI, is what counts for a child.Height Percentile CalculatorWhere your height sits against the US adult reference, with the z-score and standard-deviation band.Keto CalculatorCompute your keto macros (fat, protein, net carbs) from BMR/TDEE and your keto diet type.

Open One-Mile Walk Test Calculator (1 mile = 1.6 km, Rockport) and you get an answer straight away, with no account to create. It sits under Weight & body in our catalogue, alongside Am I Overweight? Calculator and Am I Underweight? Calculator.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What is One-Mile Walk Test Calculator (1 mile = 1.6 km, Rockport)?

Estimate your VO₂max and cardio-fitness rating from the Rockport one-mile walk test. Enter the distance in miles or kilometres (1 mile = 1.609344 km), your weight in kg or lb, the walk time and your ending heart rate, and read your speed in both mph and km/h.

When would I actually use this?

Getting a reference point before a check-up, setting a realistic target, and understanding why two people of the same weight can be in very different shape — and, the same act from the other side, putting a day's caffeine, salt, sugar or alcohol beside the ceiling a health body publishes for it.

What is the most common mistake?

Reading BMI as a measure of health. It cannot tell muscle from fat, which is why athletes routinely score as overweight and why it says little about an individual.

How is One-Mile Walk Test Calculator (1 mile = 1.6 km, Rockport) different from Am I Overweight? Calculator?

They sit next to each other but answer different questions: Am I Overweight? Calculator is the one to open when you need it to find out if you're overweight from your BMI, with your healthy weight range and kg to reach it. Pick whichever matches what you're starting from — both are free.

Is there a tool for the next step?

Am I Underweight? Calculator is the closest one after this: Find out if you're underweight from your BMI, with your healthy weight range and kg to reach it.

What else is worth having open alongside it?

Biological Age Calculator and Body Frame Size Calculator — they come up in the same task often enough to be worth a second tab.

Where do the figures come from?

The formulas are the published ones (Quetelet for BMI, Mifflin-St Jeor or Harris-Benedict for energy expenditure) and the tool names which it used. None of this is a diagnosis or a substitute for a clinician.

Further reading

All guides →
ExplainerThe One-Mile Walk Test, and What a VO2max Estimate AssumesThe Rockport test turns a brisk one-mile walk into a VO2max number using five inputs and one published regression. Here is the equation, one person worked through it, and the two assumptions — a stated standard error and a genuinely brisk pace — that decide whether the answer means anything.ComparisonBiological Age vs Chronological Age: What Each One Actually MeasuresChronological age is exact. Biological age is not one thing but three — epigenetic clocks, blood-marker scores and lifestyle quizzes — and only the first two have published validation. Here is how to tell which one you are looking at.GuideThe Cooper Test: Distance Standards by Age and What They MeanRun as far as you can in twelve minutes, then read the distance against your age and sex. The same number also converts straight into an estimated VO2 max — here is the table and the formula.ExplainerAm I Overweight? Why One Number Cannot SayBMI reads muscular bodies as heavy and cannot see where fat sits at all — which is exactly why the waist measures exist. Here are the published waist and waist-to-height thresholds, a worked case where BMI and waist give opposite answers, an honest account of the contested mortality curves, and the 2025 shift toward defining obesity by adiposity and organ function rather than by a ratio.ExplainerAm I Underweight? What the Question Is Really AskingThe 18.5 cut-off is a population screening line, not a diagnosis. Here is where it comes from, what the mortality data below it actually show, and the three things it cannot see: body composition, recent change — which is far more informative than the level — and the fact that the same line does not fit every age or every population.ExplainerHow Tall Will a Child Be? The Arithmetic Is Easy; the Error Bar Is the StoryAverage the parents' heights, shift by a sex constant, and you have a target height. The honest part is what comes next: the published prediction interval is about ±4 inches, wide enough to cover most of the adult population. Here is the formula, the interval, why bone age does better, and why children keep out-growing the target.