Health & Fitness Toolkit

Calculate your BMI with this free online BMI calculator in kg/cm or lb/ft-in. See your WHO or Asian BMI category and the healthy weight range for your height.

Calculate your body fat percentage online free with the U.S. Navy tape method in cm or inches. Free online body fat calculator with lean mass and ACE chart.

Calculate your ideal body weight with this free online ideal weight calculator using the Robinson, Miller, Devine and Hamwi formulas plus the healthy BMI range.

Calculate how many calories you need per day to maintain, lose or gain weight. Free online calorie and TDEE calculator with BMR and macro breakdown.

Calculate how much protein you need per day with this free online protein calculator — by weight, goal and activity, with per-meal grams and food examples.

Calculate how much water to drink a day with this free online water intake calculator, based on weight, exercise and climate, plus a daily glass tracker.

Calculate your running pace, finish time or distance online free in km or miles. Free online pace calculator with 5K to marathon predictions and splits.

Calculate calories burned walking, running, cycling, swimming and 30+ activities by weight and time with this free online calories burned calculator.

Calculate your target heart rate and 5 training zones by age with this free online target heart rate calculator — max HR, Karvonen method and fat-burning zone.

Calculate your one rep max (1RM) from any set with this free online one rep max calculator — 7 formulas averaged, plus a 50–100% training weight table.

Set an online countdown timer with alarm or use the stopwatch with laps. Free online timer — 1, 5, 10, 25 minute presets, works in any browser, no app needed.

Calculate the best time to go to bed or wake up online free using 90-minute sleep cycles. Free online sleep calculator and bedtime planner for all ages.

Follow a free online guided breathing exercise: box breathing, 4-7-8 or coherent breathing with an animated circle and sound cues to calm anxiety and sleep.

Play white noise, brown noise, pink noise, rain, ocean and fan sounds free online. Mix sounds for sleep, babies and focus with a fade-out sleep timer.