Resting Metabolic Rate Women Calculator

Estimate resting energy use for an adult woman from weight, height and age using the Mifflin–St Jeor equation.

INPUT & RESULT

How the result changes

Weight (kg)Current: 75 → 1,532.8 kcal/day

Only weight changes; all other inputs stay at your current values. The line illustrates the formula across the shown range. This is not a forecast of real-world outcomes.

About this calculation

Estimate resting energy expenditure for an adult woman from weight, height, and age using the Mifflin–St Jeor equation. The result is a prediction in kilocalories per day at rest. It is not a direct measurement of metabolism or a daily calorie target.

Formula

Mifflin–St Jeor equation

Worked example

With Weight: 75 kg, Height: 175 cm, Age: 30 years, estimated rmr is 1,532.75 kcal/day.

The equation and its units

Estimated resting energy expenditure = 10 × weight (kg) + 6.25 × height (cm) − 5 × age (years) − 161. Use kilograms, centimeters, and full years as labeled; mixing pounds or meters into this equation produces a wrong answer.

For the default example of 75 kg, 175 cm, and age 30, the estimate for women is 1,532.75 kcal/day. This is energy used under resting conditions, not the amount burned through a whole day of movement and eating.

What the number does and does not represent

The Mifflin–St Jeor study compared a population prediction with measured resting expenditure in healthy adults. In the women’s equation, 161 is subtracted after the weight, height, and age terms. The difference from the men’s equation at identical inputs is a model coefficient, not a direct measurement of an individual woman’s metabolism. Body composition and health can change actual expenditure.

Resting needs versus total daily needs

A woman’s predicted resting expenditure is only one part of energy used across a day. Movement, daily routines, and other physiological factors add to it. A daily-expenditure estimate introduces an activity multiplier and therefore more uncertainty. Pregnancy, breastfeeding, illness, and other individual circumstances cannot be inferred from these three fields.

Read the example and units

The worked values on this page use weight 75 kg, height 175 cm, and age 30 years. With those exact entries, the calculator reports estimated rmr 1,532.75 kcal/day. This is predicted expenditure at rest. It does not add the energy used in work, travel, exercise, or other daily activities. The result uses the units and population assumptions stated on this page. A calculated screening value or estimated energy or heart-rate number is not a direct clinical measurement. Check the source measurement method and the scope of the formula before comparing it with a personal health record.

Compare one changed input

For a second scenario, change only weight 75 kg to weight 83 kg and leave the other example entries alone. The result for estimated rmr changes from 1,532.75 kcal/day to 1,612.75 kcal/day. Comparing one changed input at a time shows exactly which assumption drove the difference in this calculation. This is a sensitivity check on the equation, not a prediction of an individual response. Measurement error and variation between people can be larger than the numerical difference between two nearby scenarios.

How to interpret this kind of result

Resting energy expenditure is an equation-based prediction derived from weight, height, age, and the model category shown in the title. It describes estimated energy use under resting conditions. The equation does not use an activity factor, so its answer should not be read as total expenditure over an ordinary day of movement. For this resting metabolic rate women calculation, weight in kg, height in cm, and age in years determine estimated rmr; the displayed estimated rmr 1,532.75 kcal/day belongs to that exact combination rather than to a different rate, term, or measurement basis.

Scope and practical checks

A population equation can differ from a direct measurement for an individual. Body composition, medications, illness, and other personal factors are not included in the short set of inputs. Use the value to understand a modeled resting scenario, not as a personalized food prescription; the cited original study explains the equation’s basis. The women’s version of the Mifflin–St Jeor equation subtracts 161 after its weight, height, and age terms. Check the weight in kg, height in cm, and age in years entries against the quantities in your own situation before using estimated rmr; this page cannot infer a field or condition that you did not enter.

Common questions

Is this the same as a measured metabolic rate?

No. The women’s equation is a prediction from height, weight, and age. Direct resting-energy measurement requires appropriate testing rather than these inputs alone.

Why does the calculator ask for age?

The women’s published equation includes −5 times age in years before its −161 constant. Holding the other entries fixed, one more year changes the prediction by −5 kcal/day.

Should I eat exactly this many calories?

No. This is an estimate at rest, not a complete calorie recommendation for a woman with individual activity and health needs.

What does this resting metabolic rate women result include?

The estimated rmr comes from weight in kg, height in cm, and age in years using the displayed rule Mifflin–St Jeor equation. The equation selected on this page uses the published women’s constant of minus one hundred sixty-one. It does not automatically include a condition absent from the listed inputs. Treat the result as the formula’s estimate or screening measure, not an individual medical diagnosis or prescription.