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Useful numbers start with clear assumptions.

Every calculator should tell you what it estimates, how it works and where the model stops.

One model is not every person.

StrideCalc provides educational estimates for adults. Our tools apply published equations or transparent arithmetic to the inputs you choose. They do not measure your metabolism, diagnose a condition or determine a suitable diet or exercise plan.

A numerical result can be calculated correctly and still differ from your individual physiology. We show useful display precision without claiming that the last digit is accurate.

What each tool uses

Units, rounding and validation

Calculations use kilograms, centimeters, kilometers and minutes internally. Exact conversions are 1 lb = 0.45359237 kg, 1 inch = 2.54 cm and 1 mile = 1.609344 km. Switching units converts the displayed inputs; it does not treat the same number as a different unit.

Calories are generally shown as whole numbers; composition estimates use one decimal place. Components can differ from a displayed total by one calorie because they are rounded separately. Unit-switch inputs retain four to six decimal places to reduce conversion drift.

Our input bounds are software guardrails, not research-validated ranges for every individual. We reject empty, non-finite, out-of-range or impossible combinations. Treadmill walking is limited to 3–6 km/h and 0–15% incline; continuous walking estimates are limited to eight hours. A number inside these bounds is not a guarantee of individual accuracy.

Resting energy and activity multipliers

Movement tools use a conventional 1 MET resting allowance, equivalent here to 3.5 mL/kg/min oxygen use. Total energy includes this allowance; active energy removes it. The conversion assumes 5 kcal per liter of oxygen.

The daily-energy tool estimates resting expenditure with Mifflin–St Jeor. The activity multipliers are separate heuristics. They are not measured exercise expenditures and should not be presented as coefficients from the original resting-energy paper.

Sources you can inspect

Editorial standards

Our guides explain how to use the tools and interpret their assumptions. Numerical examples are computed with the stated model. StrideCalc editorial is a publishing name, not a medical qualification. This initial library has not undergone independent medical review, and we do not present it as clinician-approved.

Each tool and guide identifies its method and sources. We avoid universal calorie-per-step promises, body-fat health labels, weight-loss deadlines and fabricated precision. The historical Navy method is not presented as a current military eligibility assessment.

When a different assessment is needed

These tools are not designed for children, pregnancy, breastfeeding or medical nutrition planning. Body-composition estimates are not a substitute for an appropriate individual assessment. Discuss clinical questions with a qualified professional who can account for your circumstances.

Methods and source links last checked September 14, 2026.