Health Calculators

Sleep Cycle Calculator – Wake at 06:00 Calculates approximate sleep duration from a chosen number of sleep cycles; it is a timing estimate, not a medical sleep assessment. Enter the sleep cycles and wake time. Open calculator → Sleep Debt Calculator – 6 Hours Sleep / 9 Hour Target Calculates weekly sleep debt when average sleep is 6 hours against a 9-hour target. Enter the average sleep and target sleep. Educational estimate only. Open calculator → Sleep Duration Calculator – 6 Hours from 23:00 Calculates an approximate wake time after 6 hours of sleep starting at 23:00. Enter the sleep duration and bedtime. Educational estimate only. Open calculator → TDEE Calculator for Cyclist Estimates daily energy expenditure for a cyclist using Mifflin-St Jeor BMR and a selectable activity level. Enter the sex and age. Educational estimate only. Open calculator → TDEE Calculator – Age 22 – Moderately Active Estimates total daily energy expenditure at age 22 using Mifflin-St Jeor BMR and a moderately active activity factor. Enter the sex and age. Educational estimate only. Open calculator → TDEE Calculator – Age 32 – Very Active Estimates total daily energy expenditure at age 32 using Mifflin-St Jeor BMR and a very active activity factor. Enter the sex and age. Educational estimate only. Open calculator → TDEE Calculator – Age 44 – Moderately Active Estimates total daily energy expenditure at age 44 using Mifflin-St Jeor BMR and a moderately active activity factor. Enter the sex and age. Educational estimate only. Open calculator → TDEE Calculator – Age 54 – Sedentary Estimates total daily energy expenditure at age 54 using Mifflin-St Jeor BMR and a sedentary activity factor. Enter the sex and age. Educational estimate only. Open calculator → Calorie Calculator for Maintenance Estimates daily calorie needs for maintenance planning from Mifflin-St Jeor BMR and activity. Enter the sex and age. Educational estimate only. Open calculator → 1RM Calculator – 12 Rep Estimate Estimates one-repetition maximum from a 12-rep lift using a standard 1RM estimation formula. Enter the lifted weight and repetitions. Educational estimate only. Open calculator → 1RM Calculator – 17 Reps – Brzycki Estimates one-repetition maximum from a 17-rep lift using the Brzycki formula. Enter the lifted weight and repetitions. Educational estimate only. Open calculator → 1RM Calculator – 23 Rep Estimate Estimates one-repetition maximum from a 23-rep lift using a standard 1RM estimation formula. Enter the lifted weight and repetitions. Educational estimate only. Open calculator →