Calculators to help you lose weight
47 tools matched to this goal.
BMI Calculator
Body mass index from height and weight, with your healthy weight range.
Body Fat Calculator (US Navy)
Estimate body fat percentage from tape measurements.
Ideal Weight Calculator
Compare ideal weight from four classic formulas.
Lean Body Mass Calculator
Split your weight into lean mass and fat mass.
Waist-to-Hip Ratio Calculator
Check where your body stores fat and the related health risk.
Waist-to-Height Ratio Calculator
A simple rule: keep your waist under half your height.
Body Roundness Index Calculator
A shape-based index of visceral fat from waist and height.
BMI Prime & Ponderal Index
How far your BMI sits from the upper healthy limit of 25.
Body Frame Size Calculator
Small, medium or large frame from height and wrist size.
Weight Change Percentage Calculator
Measure how much your weight has changed, in kg and as a percentage.
Healthy Weight Range Calculator
The weight range that gives a BMI of 18.5 to 24.9 for your height.
Adjusted Body Weight Calculator
A dosing and nutrition weight for people who are well above ideal weight.
Body Fat from BMI Calculator
Estimate body fat percentage from BMI, age and sex (Deurenberg).
Relative Fat Mass Calculator
A body fat estimate using only height and waist.
A Body Shape Index (ABSI) Calculator
Waist risk adjusted for height and weight.
Waist Circumference Risk Calculator
Check waist size against sex-specific risk thresholds.
Body Adiposity Index Calculator
Estimate body fat percentage from hip circumference and height.
BMR Calculator
Calories your body burns at complete rest.
TDEE & Daily Calorie Calculator
Total daily energy expenditure at each activity level.
Weight Loss Timeline Calculator
How long to reach a goal weight at your calorie intake.
Macro Calculator
Protein, carb and fat grams for your calorie target.
Protein Intake Calculator
Daily protein range for your weight and goal.
Added Sugar Limit Calculator
Compare your sugar intake with WHO and AHA limits.
Meal Calorie Planner
Divide daily calories across your meals and snacks.
Calorie Deficit for Weight Goal Calculator
Daily calorie deficit needed to reach a target weight by a chosen date.
Recipe Calories per Serving Calculator
Divide a recipe’s total calories by its number of servings.
Food Calories by Weight Calculator
Calories in a portion from calories per 100 g and the grams you eat.
Hand Portion Size Estimator
Estimate daily portions of protein, carbs, vegetables and fats using your hand.
Target Heart Rate Calculator
Heart rate training zones using the Karvonen method.
Calories Burned Running Calculator
Calories burned for a run of any distance.
Steps to Calories Calculator
Convert your daily steps to distance and calories.
Cycling Calories Calculator
Calories burned cycling by speed and time.
Calories Burned by Activity
Compare calories burned across ten activities.
Walking Time for Distance Calculator
How long a walk takes at your speed.
Steps for Distance Calculator
Estimate how many steps a distance takes from your height.
Interval Training Time Calculator
Total time for work and rest intervals.
Pool Laps Calculator
Number of lengths needed to swim a set distance.
HOMA-IR Calculator
Insulin resistance estimated from fasting glucose and insulin.
Last Meal Before Bed Timing Calculator
Check the gap between your last meal and bedtime.
Alcohol Units & Calories Calculator
Weekly alcohol units and calories from your drinks.
Daily Step Goal Planner
Build up your steps gradually toward a goal.
Alcohol-Free Savings Calculator
Money, calories and units avoided since you stopped.
Active Commute Minutes Calculator
Weekly minutes of walking or cycling to work or school.
Sunscreen Quantity Calculator
How much sunscreen to pack for a day outdoors.
Movement Break Planner
Plan how often to stand up during a day of sitting.
Cooking Oil Calories Calculator
Calories added to a dish by tablespoons of oil.
Sugary Drink Calories Calculator
Calories and body-fat equivalent from regular sugary drinks.
Other goals
- Lose weight
- Build muscle
- Eat better
- Get fitter
- Protect my heart
- Manage blood sugar
- Pregnancy & fertility
- Care for my child
- Sleep better
- Mental wellbeing
- Cut back on drink, smoke & caffeine
- Understand my lab results
Related guides
What Is BMI and What Does It Really Tell You?
BMI is a quick screening number. Here is what it measures, where it falls short and how to use it sensibly.
Weight & Body CompositionHow to Find a Healthy Weight Range for Your Height
There is no single perfect weight. Learn how clinicians use ranges and several formulas.
Weight & Body CompositionBody Fat Percentage Explained
What counts as lean, average or high body fat, and how to estimate yours at home.