Health Calculators

Sleep Debt Calculator – 4 Hours Sleep / 6 Hour Target Calculates weekly sleep debt when average sleep is 4 hours against a 6-hour target. Enter the average sleep and target sleep. Educational estimate only. Open calculator → Sleep Debt Calculator – 7 Hours Sleep / 8 Hour Target Calculates weekly sleep debt when average sleep is 7 hours against a 8-hour target. Enter the average sleep and target sleep. Educational estimate only. Open calculator → Sleep Duration Calculator – 7 Hours from 22:00 Calculates an approximate wake time after 7 hours of sleep starting at 22:00. Enter the sleep duration and bedtime. Educational estimate only. Open calculator → TDEE Calculator for Recreational Athlete Estimates daily energy expenditure for a recreational athlete using Mifflin-St Jeor BMR and a selectable activity level. Enter the sex and age. Educational estimate only. Open calculator → TDEE Calculator – Age 24 – Sedentary Estimates total daily energy expenditure at age 24 using Mifflin-St Jeor BMR and a sedentary activity factor. Enter the sex and age. Educational estimate only. Open calculator → TDEE Calculator – Age 36 – Moderately Active Estimates total daily energy expenditure at age 36 using Mifflin-St Jeor BMR and a moderately active activity factor. Enter the sex and age. Educational estimate only. Open calculator → TDEE Calculator – Age 46 – Sedentary Estimates total daily energy expenditure at age 46 using Mifflin-St Jeor BMR and a sedentary activity factor. Enter the sex and age. Educational estimate only. Open calculator → TDEE Calculator – Age 56 – Very Active Estimates total daily energy expenditure at age 56 using Mifflin-St Jeor BMR and a very active activity factor. Enter the sex and age. Educational estimate only. Open calculator → Pregnancy Due Date Calculator – Last Menstrual Period Estimates a pregnancy due date from last menstrual period using standard calendar date arithmetic. Enter the conception date. Educational estimate only. Open calculator → 1RM Calculator – 13 Reps – Brzycki Estimates one-repetition maximum from a 13-rep lift using the Brzycki formula. Enter the lifted weight and repetitions. Educational estimate only. Open calculator → 1RM Calculator – 18 Reps – Epley Estimates one-repetition maximum from a 18-rep lift using the Epley formula. Enter the lifted weight and repetitions. Educational estimate only. Open calculator → 1RM Calculator – 27 Rep Estimate Estimates one-repetition maximum from a 27-rep lift using a standard 1RM estimation formula. Enter the lifted weight and repetitions. Educational estimate only. Open calculator →