Health

Activity Calories Calculator

Calculate energy burned during exercise or daily steps using standard MET values, your weight, and duration — or convert…

BMI Calculator

Enter your weight and height to see your BMI, category, and a healthy weight range for your height.…

Body Fat Calculator

Estimate body-fat percentage from neck, waist (and hip) circumferences using the US Navy method — a tape-measure alterna…

Calorie Calculator

Estimate daily calorie needs from age, sex, height, weight, and activity using the Mifflin–St Jeor equation, then use th…

Calorie Deficit Calculator

Find the daily deficit you need to reach a goal by a target date, or see how long it takes at a deficit you choose.…

Heart Rate Zones Calculator

Pick a max-HR formula, enter your age (and optional resting or check heart rate), and see five standard training zones —…

Ideal Weight Calculator

Enter your height to see the weight range that matches a healthy adult BMI (18.5–24.9). Add your current weight to see w…

Macro Calculator

Get daily protein, carb and fat targets in grams, based on your body, activity, goal and a macro split you can adjust.…

Noise Exposure Calculator

Enter a sound level in A-weighted decibels (dBA) and how long you’re exposed. See your maximum safe time and daily noise…

Ovulation Calculator

Estimate your ovulation day and fertile window from the first day of your last period and your average cycle length.…

Running Pace Calculator

Work out your pace, finish time or distance. Get your speed, split times and predicted times for other race distances.…

Period Calculator

Enter the first day of your last period and your usual cycle length. We’ll show your next three periods, ovulation and f…

Pregnancy Due Date Calculator

Estimate your due date from last period, conception, IVF transfer or ultrasound dating. See how far along you are, trime…

Pregnancy Test Calculator

Estimate when a home urine pregnancy test is most likely to work from your last period start and average cycle length. T…

Protein Intake Calculator

Get a daily protein range in grams based on your weight, goal and training level, whether you want to maintain, lose fat…

Sleep Calculator

Plan your bedtime or wake-up time around 90-minute sleep cycles, so you're more likely to wake up between cycles instead…

Waist Ratio Calculator

Screen for excess belly fat with your waist-to-height ratio or waist-to-hip ratio, with clear risk bands and a waist tar…

Water Intake Calculator

Estimate your daily drinking-water target from body weight and extra activity, then track your glasses through the day.…