How the TDEE Calculator works.
RMR = 10W + 6.25H − 5A + s; TDEE = RMR × activity factorW is kg, H is cm, A is age, and s is +5 for the male coefficient set or −161 for the female coefficient set.
Equation, units, and population
RMR = 10W + 6.25H − 5A + s; TDEE = RMR × activity factor. W is kg, H is cm, A is age, and s is +5 for the male coefficient set or −161 for the female coefficient set. This page names the equation rather than presenting an unexplained score. Check that every value uses the displayed unit and that you belong to the population for which the method is described. The calculation retains full precision internally and rounds only the visible result. A reproducible estimate should let another reader use the same inputs and reach the same arithmetic answer, while still recognizing that mathematical reproducibility does not prove medical suitability.
Worked example
For a 30-year-old, 70 kg, 175 cm adult using the female coefficient set, RMR is about 1,483 kcal/day. With light activity factor 1.375, TDEE is about 2,039 kcal/day. Work through the example by writing the equation, substituting each labeled input, and preserving units at every step. The example demonstrates arithmetic only; it is not a recommended body measurement, intake, exercise level, laboratory value, or date. Replace every example input with the values from the situation being considered, and retain those inputs with any result you copy. Small differences can arise from rounding, equation versions, atomic-weight conventions, or date boundaries.
What the result means
The result is an estimated average maintenance-energy starting point, not a guaranteed intake. Body trends and professional guidance are more informative than day-to-day scale changes. Use the result only for the purpose named on this page and keep the equation, population, and measurement conditions consistent when comparing values over time. If it conflicts with symptoms, a laboratory report, a clinician’s instructions, or a validated measurement, use the appropriate professional evidence rather than this calculator.
Validation and edge cases
Age is restricted to 18–100, height 120–230 cm, weight 30–300 kg, and only published activity factors are accepted. Pregnancy or breastfeeding stops the generic estimate. Blank, malformed, nonfinite, and out-of-domain inputs fail explicitly without producing NaN or infinity. The bounds prevent obviously implausible values from being mistaken for meaningful answers, but passing a range check does not make an input medically correct. Recheck dates, decimal separators, unit conversions, coefficient choices, and whether a laboratory value uses the expected assay and unit. Contact a qualified professional when a result could affect treatment, medication, pregnancy care, nutrition therapy, or exercise safety.
Limitations and responsible use
Activity multipliers are rough categories and actual energy expenditure varies with body composition, occupation, training, illness, temperature, growth, recovery, and adaptive changes. TDEE is not a calorie prescription. Do not use it to support extreme restriction, rapid weight loss, an eating disorder, or nutrition decisions during pregnancy or breastfeeding. FigureNest processes these inputs locally in the browser and does not send them to a calculation service. The page does not create a medical record, assess symptoms, or know personal history. Avoid using estimates to shame a body, pursue unsafe restriction, delay care, determine legal fitness, or replace contraception. Authoritative source links are provided so readers can check the equation version and current guidance before making a consequential decision.
What this tool does not include.
Activity multipliers are rough categories and actual energy expenditure varies with body composition, occupation, training, illness, temperature, growth, recovery, and adaptive changes.
Reference guidance and methodology.
TDEE Calculator questions.
What does the TDEE Calculator estimate?
Estimate adult resting energy with Mifflin–St Jeor and multiply it by a clearly labeled activity factor.
Which equation and units does it use?
RMR = 10W + 6.25H − 5A + s; TDEE = RMR × activity factor. W is kg, H is cm, A is age, and s is +5 for the male coefficient set or −161 for the female coefficient set.
Is this medical advice or a diagnosis?
No. TDEE is not a calorie prescription. Do not use it to support extreme restriction, rapid weight loss, an eating disorder, or nutrition decisions during pregnancy or breastfeeding.
Which limitations matter most for the TDEE Calculator?
The limits follow from the scope of RMR = 10W + 6.25H − 5A + s; TDEE = RMR × activity factor; the limitations section explains the relevant population, measurements, and intended use.