Health & Fitness

BMR Calculator

Full calculator

Health & Fitness

BMR Calculator

Body basics first

Instant metabolism answer1,743 kcal/day2,091 kcal/day with 1.2 activity factor.

2,091Maintenance estimateMifflinFormula1.2Activity factor1568-1917Estimate band

Mifflin-St Jeor formula: 10 x kg + 6.25 x cm - 5 x age + 5. This is health education arithmetic, not medical advice.

Mifflin-St JeorMetric inputsNot a prescription

Age (years)Weight (kg)Height (cm)

Activity context

Keep BMR separate from maintenance calories. Activity multipliers are context only and can be wrong for illness, pregnancy, eating-disorder risk, adolescents, elite athletes, or clinical nutrition.

Live result1,743 kcal/day2,091 kcal/day with 1.2 activity factor.

Formula used

Mifflin-St Jeor BMR = 10 × weight kg + 6.25 × height cm − 5 × age years + S, where S is +5 for the male equation and −161 for the female equation. The interface also offers a revised Harris-Benedict comparison.

This is the method behind the answer, so the result can be checked rather than simply trusted.

Live math canvas

Your numbers, formula and explanation together

BMR Calculator: 1,743 kcal/day. Mifflin-St Jeor: 10×80 + 6.25×178 - 5×35 + 5. Resting estimate only.

Formula applied

The exact method behind this answer

CalculationTime keeps the method visible so the number can be checked instead of blindly trusted.

Mifflin-St Jeor BMR = 10 × weight kg + 6.25 × height cm − 5 × age years + S, where S is +5 for the male equation and −161 for the female equation. The interface also offers a revised Harris-Benedict comparison.

Apply the formulaMifflin-St Jeor BMR = 10 × weight kg + 6.25 × height cm − 5 × age years + S, where S is +5 for the male equation and −161 for the female equation. The interface also offers a revised Harris-Benedict comparison.1,743 kcal/dayMifflin-St Jeor: 10×80 + 6.25×178 - 5×35 + 5. Resting estimate only.

Your live breakdown

Current inputs in the calculation

These values come from the controls above and update when the calculator changes.

Sex for equation: Male equation
Age: 35 years
Weight: 80 kg
Height: 178 cm

Resulting answer

1,743 kcal/day

Mifflin-St Jeor: 10×80 + 6.25×178 - 5×35 + 5. Resting estimate only.

Answer: 1,743 kcal/day
Live support: Mifflin-St Jeor: 10×80 + 6.25×178 - 5×35 + 5. Resting estimate only.

Assumptions used

What this answer assumes

The visible assumptions define the boundary of this calculation.

BMR is an estimate of resting energy use, not total daily expenditure.
Activity multipliers are rough context, not clinical prescription.
Population equations can be less accurate for unusual body composition, pregnancy, illness, adolescents, elite athletes or clinical conditions.

Master’s Tip

How to use the result well

Master’s Tip: BMR is the floor estimate. Multiply by activity to estimate total daily energy expenditure.

Printable record

What belongs in the saved calculation

Save the inputs, result, formula, assumptions, page URL and date together so the calculation can be reviewed later.

Sex for equation: Male equation
Age: 35 years
Weight: 80 kg
Height: 178 cm

Visual grid

This number is one point on a larger pattern

BMR is not just a final answer. It is a step on a line: before and after, input and output, assumption and result.

Micro-timehours, minutes, shiftsHuman scaledays, weeks, projectsMacro-timemonths, years, calendars

InputFormulaResult

1,743 kcal/day

CalculationTime keeps the path visible: the input, the method and the final number belong together.

1,743 kcal/dayMifflin-St Jeor: 10×80 + 6.25×178 - 5×35 + 5. Resting estimate only.

Inputs

Sex for equation: Male equation
Age: 35 years
Weight: 80 kg
Height: 178 cm

Method

An 80 kg, 178 cm, 35-year-old using the male equation gives 10×80 + 6.25×178 − 5×35 + 5 = 1,742.5 kcal/day.

Assumptions

BMR is an estimate of resting energy use, not total daily expenditure.
Activity multipliers are rough context, not clinical prescription.
Population equations can be less accurate for unusual body composition, pregnancy, illness, adolescents, elite athletes or clinical conditions.

Notes

Use this space on the printed report for client, supplier, classroom, job-location, measurement, quote or approval notes.