Health Calculators

Race Time Calculator – 10K at 5 min/km Estimates 10K finish time at a 5 minute-per-kilometer pace. Enter the distance and pace. Educational estimate only. Open calculator → Race Time Calculator – 5K at 5 min/km Estimates 5K finish time at a 5 minute-per-kilometer pace. Enter the distance and pace. Educational estimate only. Open calculator → Race Time Calculator – Marathon at 5 min/km Estimates Marathon finish time at a 5 minute-per-kilometer pace. Enter the distance and pace. Educational estimate only. Open calculator → Sleep Debt Calculator – 5 Hours Sleep / 7 Hour Target Calculates weekly sleep debt when average sleep is 5 hours against a 7-hour target. Enter the average sleep and target sleep. Educational estimate only. Open calculator → Sleep Debt Calculator – Rest Day Calculate accumulated sleep debt from average sleep and days. This variant is framed for rest day use. Enter the average sleep and target sleep. Educational estimate only. Open calculator → Sleep Duration Calculator – 8 Hours from 23:00 Calculates an approximate wake time after 8 hours of sleep starting at 23:00. Enter the sleep duration and bedtime. Educational estimate only. Open calculator → TDEE Calculator for Swimmer Estimates daily energy expenditure for a swimmer using Mifflin-St Jeor BMR and a selectable activity level. Enter the sex and age. Educational estimate only. Open calculator → TDEE Calculator – Age 28 – Sedentary Estimates total daily energy expenditure at age 28 using Mifflin-St Jeor BMR and a sedentary activity factor. Enter the sex and age. Educational estimate only. Open calculator → TDEE Calculator – Age 38 – Very Active Estimates total daily energy expenditure at age 38 using Mifflin-St Jeor BMR and a very active activity factor. Enter the sex and age. Educational estimate only. Open calculator → TDEE Calculator – Age 50 – Moderately Active Estimates total daily energy expenditure at age 50 using Mifflin-St Jeor BMR and a moderately active activity factor. Enter the sex and age. Educational estimate only. Open calculator → Sleep Debt Calculator – Beginner Use the Sleep Debt Calculator – Beginner to understand the calculation, inputs, method, examples, and practical interpretation. Open calculator → 1RM Calculator – 1 Reps – Epley Calculate with the 1rm calculator – 1 reps – epley. See the formula, inputs, worked example, and practical guidance. Open calculator →