How to calculate BMR calculator?

BMR estimates the calories your body needs at rest to maintain vital functions using the Mifflin-St Jeor equation.

Mifflin-St Jeor formula: BMR (men) = 10 × weight_kg + 6.25 × height_cm − 5 × age + 5; BMR (women) = 10 × weight_kg + 6.25 × height_cm − 5 × age − 161

Using the BMR calculator calculator: an example

Example using realistic input values to compute an estimated BMR.

Step-by-step calculation:

1. Example inputs: age 35 years, weight 68 kg, height 165 cm, sex: Female.
2. Apply the women’s formula: 10×68 + 6.25×165 − 5×35 − 161.
3. Calculate intermediate values: 680 + 1031.25 − 175 − 161 = 1375.25 → round ≈ 1375 Calories/day.
4. Interpretation: this is an estimate for resting energy needs; adjust for activity to get total daily requirements.

Frequently Asked Questions

What does BMR represent?

BMR is the number of calories your body requires at rest to support essential functions such as breathing, circulation and cellular maintenance.

Should I use BMR or TDEE?

BMR is a baseline. To estimate total daily energy expenditure (TDEE), multiply BMR by an activity factor that reflects your typical daily activity level.

How accurate are these formulas?

Formulas provide an estimate and can vary by individual. Use measurements and track weight or performance to refine calorie targets over time.