Energy & Metabolism

BEE Calculator

Calculate basal energy expenditure with the original Harris-Benedict formula, compare BEE vs BMR meaning.

BMR Calculator

Estimate basal metabolic rate with Mifflin-St Jeor, the Harris-Benedict equation, and optional Katch-McArdle, then compare maintenance-calorie starting points.

Calorie Calculator

Estimate daily calorie needs, maintenance calories, target intake, macro guidance, and per-meal checkpoints in one calorie calculator for weight loss.

Calorie Density Calculator

Use this calorie density calculator to turn calories and serving weight into kcal per gram, kcal per ounce, kcal per 100 g, realistic portion sizes.

EER Calculator

Use the EER calculator to estimate adult maintenance calories with current DRI estimated energy requirement equations, activity-row comparisons.

Harris Benedict Calculator

Use this Harris Benedict equation calculator to compare original Harris-Benedict, revised Harris-Benedict, and Mifflin-St Jeor BMR outputs.

Katch-McArdle Calculator

Estimate Katch-McArdle BMR from lean body mass or body weight plus body fat percentage, then compare TDEE, calorie-planning rows, goal-weight checkpoints.

Kilograms to Calories Converter

Estimate the calories needed to lose or gain a target number of kilograms, compare rough timelines at your chosen daily pace.

Mifflin-St Jeor Calculator

Calculate BMR with the Mifflin-St Jeor equation.

Pounds to Calories Converter

Convert a target weight change in pounds into an approximate calorie surplus or deficit, then compare rough timelines, weekly pace.

Quarantine Activity Calculator

Estimate restricted-activity calorie needs during quarantine, injury recovery, bed rest, or other low-movement periods.

RMR Calculator

Use this RMR calculator to estimate resting metabolic rate, compare Mifflin-St Jeor with Harris-Benedict, Katch-McArdle, and Cunningham.

Thermic Effect of Food Calculator

Estimate calories burned digesting a meal from protein, carbohydrate, and fat, then compare midpoint, range, preset meal scenarios.

Weekly Energy Balance Calculator

Log daily calorie intake and expenditure across up to 7 days to estimate net energy balance and projected weight change for the week.