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 Calculate with the pregnancy due date calculator – last menstrual period. See the formula, inputs, worked example, and practical guidance. Open calculator → 1RM Calculator – 13 Reps – Brzycki Calculate with the 1rm calculator – 13 reps – brzycki. See the formula, inputs, worked example, and practical guidance. Open calculator → 1RM Calculator – 18 Reps – Epley Calculate with the 1rm calculator – 18 reps – epley. See the formula, inputs, worked example, and practical guidance. Open calculator → 1RM Calculator – 27 Rep Estimate Use the 1RM Calculator – 27 Rep Estimate to calculate the requested value with the exact inputs and formula shown. Educational reference only. Open calculator →