Health Calculators

Race Time Calculator – 10K at 9 min/km Estimates 10K finish time at a 9 minute-per-kilometer pace. Enter the distance and pace. Educational estimate only. Open calculator → Race Time Calculator – 5K at 9 min/km Estimates 5K finish time at a 9 minute-per-kilometer pace. Enter the distance and pace. Educational estimate only. Open calculator → Race Time Calculator – Marathon at 9 min/km Estimates Marathon finish time at a 9 minute-per-kilometer pace. Enter the distance and pace. Educational estimate only. Open calculator → Sleep Debt Calculator – 6 Hours Sleep / 6 Hour Target Calculates weekly sleep debt when average sleep is 6 hours against a 6-hour target. Enter the average sleep and target sleep. Educational estimate only. Open calculator → Sleep Duration Calculator – 6 Hours from 20:00 Calculates an approximate wake time after 6 hours of sleep starting at 20:00. Enter the sleep duration and bedtime. Educational estimate only. Open calculator → Sleep Duration Calculator – 9 Hours from 22:00 Calculates an approximate wake time after 9 hours of sleep starting at 22:00. Enter the sleep duration and bedtime. Educational estimate only. Open calculator → TDEE Calculator – Age 20 – Moderately Active Estimates total daily energy expenditure at age 20 using Mifflin-St Jeor BMR and a moderately active activity factor. Enter the sex and age. Educational estimate only. Open calculator → TDEE Calculator – Age 30 – Very Active Estimates total daily energy expenditure at age 30 using Mifflin-St Jeor BMR and a very active activity factor. Enter the sex and age. Educational estimate only. Open calculator → TDEE Calculator – Age 42 – Moderately Active Estimates total daily energy expenditure at age 42 using Mifflin-St Jeor BMR and a moderately active activity factor. Enter the sex and age. Educational estimate only. Open calculator → TDEE Calculator – Age 52 – Sedentary Estimates total daily energy expenditure at age 52 using Mifflin-St Jeor BMR and a sedentary activity factor. Enter the sex and age. Educational estimate only. Open calculator → TDEE Calculator – Age 28 – Moderately Active Use the TDEE Calculator – Age 28 – Moderately Active to understand the calculation, inputs, method, examples, and practical interpretation. Open calculator →