THE TOOL DESK

Calculator directory

Choose a tool to see the estimate, formula and full context.

01BMI CalculatorEstimate an adult BMI range from height and weight.↗ 02BMR CalculatorEstimate resting energy needs with the Mifflin–St Jeor equation.↗ 03TDEE CalculatorEstimate total daily energy expenditure from BMR and activity.↗ 04Body Fat EstimatorUse circumference measurements to estimate a body-fat range.↗ 05Healthy Weight RangeConvert the adult BMI reference interval into a weight range.↗ 06Protein Intake EstimatorEstimate a broad daily protein range from weight and activity.↗ 07Daily Water EstimatorEstimate an adjustable daily total-water reference range.↗ 08Running Pace CalculatorConvert distance and elapsed time into average pace and speed.↗ 09Marathon Time PredictorEstimate a marathon finish-time range from a recent race.↗ 10Heart Rate Training ZonesEstimate five training zones from age and resting heart rate.↗ 11Sleep Cycle TimesPlan a bedtime or wake-time window using variable cycle lengths.↗ 12Pregnancy Due DateEstimate a due date and surrounding window from the last period.↗ 13Age CalculatorCalculate calendar age in years, months and days.↗