How many health & Fitness tools are there?

29: BMI Calculator, BMR Calculator, TDEE Calculator, Calorie Calculator, Body Fat Calculator, Army Body Fat Calculator, Lean Body Mass Calculator, Ideal Weight Calculator and more. Each one shows the formula or rule it uses, so you can check the answer rather than trusting it.

Which health & Fitness tool should I use first?

BMI Calculator is the most used on the shelf: body mass index with a healthy-range read-out. Every tool works the same way, with inputs at the top and the working underneath the answer.

Is it free, and is my data stored?

Free and private. The calculation runs in your browser, so figures never leave your device, there is no account, and no calculation is logged.

Mondo Knows Tools

Free Health & Fitness Calculators for BMI, Calories, Body Fat & More

Understand your body without the guesswork. These free calculators cover BMI, daily calories, body fat, macros, ideal weight, heart rate zones and more, each one explaining how the number is worked out so you know what it means.

29 free tools on this shelf, all running in your browser

Army Body Fat CalculatorUS Army standard tape method for body fat.Blood Alcohol CalculatorEstimated blood alcohol content (Widmark formula).BMI CalculatorBody mass index with a healthy-range read-out.BMR CalculatorBasal metabolic rate, the calories you burn at rest.Body Fat CalculatorBody fat percentage from simple tape measurements.Body Surface Area CalculatorBSA from the Du Bois and Mosteller formulas.Body Type CalculatorSomatotype read from your measurements.Bra Size CalculatorBand and cup size from two measurements.Calorie CalculatorDaily calories for losing, keeping or gaining weight.Calories Burned CalculatorEnergy burned in an activity, using MET values.Carbohydrate CalculatorHow many carbs fit your calories and goal.Conception CalculatorLikely conception window from your dates.Due Date CalculatorEstimated due date from your last period.Fat Intake CalculatorDaily fat grams from calories and share.GFR CalculatorEstimated kidney filtration rate (CKD-EPI 2021).Healthy Weight CalculatorThe weight range that keeps your BMI in the healthy band.Ideal Weight CalculatorTarget weight ranges from the common clinical formulas.Lean Body Mass CalculatorHow much of your weight is lean tissue.Macro CalculatorSplit your calories into protein, carbs and fat, then into meals.One Rep Max CalculatorEstimate your 1RM from a set you have already done.Ovulation CalculatorOvulation day and the fertile window.Pace CalculatorPace, speed and finish time for a run or ride.Period CalculatorYour next few period start dates.Pregnancy CalculatorHow far along you are and the milestones ahead.Pregnancy Weight Gain CalculatorThe recommended weight-gain range for your pregnancy.Protein CalculatorDaily protein target based on weight and training.Target Heart Rate CalculatorTraining zones from your age and resting pulse.TDEE CalculatorTotal daily energy expenditure from your activity level.VO2 Max EstimateEstimate your aerobic capacity from a test, your resting heart rate, or a brisk walk.

Questions people ask

How many health & Fitness tools are there?: 29: BMI Calculator, BMR Calculator, TDEE Calculator, Calorie Calculator, Body Fat Calculator, Army Body Fat Calculator, Lean Body Mass Calculator, Ideal Weight Calculator and more. Each one shows the formula or rule it uses, so you can check the answer rather than trusting it.
Which health & Fitness tool should I use first?: BMI Calculator is the most used on the shelf: body mass index with a healthy-range read-out. Every tool works the same way, with inputs at the top and the working underneath the answer.
Is it free, and is my data stored?: Free and private. The calculation runs in your browser, so figures never leave your device, there is no account, and no calculation is logged.