Home / Categories / Health Tools
Health Tools
Estimate BMI, daily calories, energy expenditure and other general health figures. Each page names the formula it uses and the limits of the estimate.
1–14 of 14 tools
Browse categories →Most searched in Health Tools
BMI Calculator
Calculate body mass index from weight in kilograms or pounds and height in centimeters, inches or meters.
BMR Calculator
Estimate your basal metabolic rate, the calories your body burns at rest, using the Mifflin-St Jeor equation.
Body Fat Calculator
Estimate body fat percentage from neck, waist and hip measurements using the US Navy method.
Calorie Calculator
Find how many calories to eat each day to lose, maintain or gain weight.
Due Date Calculator
Find your estimated due date, trimester dates and key pregnancy milestones from your last period.
Heart Rate Calculator
Calculate your maximum heart rate and target heart rate zones for training.
Ideal Weight Calculator
Compare ideal body weight from the Devine, Robinson, Miller and Hamwi formulas with the healthy BMI range for your height.
Macro Calculator
Turn your daily calorie target into grams of protein, carbohydrate and fat.
Ovulation Calculator
Predict your likely ovulation day and fertile window from your last period and cycle length.
Pace Calculator
Calculate your running or walking pace per mile and per kilometre from distance and time, with predicted race times.
Pregnancy Calculator
Estimate your due date and how many weeks pregnant you are from the first day of your last period.
Running Pace Calculator
Enter a target pace and see your finish time for 5K, 10K, half marathon and marathon.
TDEE Calculator
Estimate total daily energy expenditure, the calories you burn in a day including activity.
Water Intake Calculator
Estimate how much water to drink each day based on body weight and exercise.
About Health Tools
This collection has 14 ready-to-use tools for health tools. Every tool runs in your browser, so the numbers you type are not sent to a server. Each page explains what to enter, shows the formula or method behind the result, and gives worked examples you can compare against your own figures.
Results are estimates for planning and comparison. Where rates, thresholds or rules change from year to year, the tool page states the tax year or assumptions it uses. Check them against an official source before you file, pay or sign anything.
Popular here: BMI Calculator, BMR Calculator, TDEE Calculator, Calorie Calculator, Macro Calculator, Body Fat Calculator, Ideal Weight Calculator, Water Intake Calculator.
Health Tools FAQ
Are these health calculators medical advice?
No. They give general screening estimates. Ask a qualified clinician about your own circumstances.
Which BMI formula is used?
BMI = weight in kilograms ÷ (height in metres)². It is a screening estimate and does not account for muscle mass, age or body shape.
Why do calorie calculators give different numbers?
The BMR calculator uses the Mifflin-St Jeor equation, and the TDEE and calorie calculators multiply BMR by an activity factor. Sites that use other equations or multipliers will give different results.