What you can do here
- Compare related tools without opening multiple tabs.
- Find quick answers for common questions in health calculators.
- Move between similar calculators and check examples when needed.
Category
Health Calculators
Explore 30 free tools in the health calculators section. Each page includes a working calculator, a short explanation, usage steps, and related tools you may also find helpful.
Category ad
Reserved ad space
BMI Calculator
Free BMI calculator using height and weight with US and metric-friendly inputs. Instantly estimate body mass index for general health screening.
BMR Calculator
Use this bmr calculator to get a fast estimate with inputs designed for US and global English-speaking users.
Body Fat Calculator
Use this body fat calculator to get a fast estimate with inputs designed for US and global English-speaking users.
Calorie Calculator
Free calorie calculator to estimate daily calorie needs based on age, sex, height, weight, and activity level. Useful for maintenance, fat loss, or weight gain planning.
Ideal Weight Calculator
Use this ideal weight calculator to get a fast estimate with inputs designed for US and global English-speaking users.
Water Intake Calculator
Use this water intake calculator to get a fast estimate with inputs designed for US and global English-speaking users.
TDEE Calculator
Use this tdee calculator to get a fast estimate with inputs designed for US and global English-speaking users.
Pregnancy Due Date Calculator
Free pregnancy due date calculator based on last menstrual period. Estimate expected due date and pregnancy timeline using a simple standard method.
Ovulation Calculator
Use this ovulation calculator to get a fast estimate with inputs designed for US and global English-speaking users.
Heart Rate Calculator
Use this heart rate calculator to get a fast estimate with inputs designed for US and global English-speaking users.
Pace Calculator
Use this pace calculator to get a fast estimate with inputs designed for US and global English-speaking users.
Protein Intake Calculator
Use this protein intake calculator to get a fast estimate with inputs designed for US and global English-speaking users.
Body Surface Area Calculator
Use this body surface area calculator to get a fast estimate with inputs designed for US and global English-speaking users.
Waist to Hip Ratio Calculator
Use this waist to hip ratio calculator to get a fast estimate with inputs designed for US and global English-speaking users.
Lean Body Mass Calculator
Use this lean body mass calculator to get a fast estimate with inputs designed for US and global English-speaking users.
Hydration Calculator
Estimate daily water intake using body weight and a hydration multiplier.
Daily Protein Calculator
Estimate daily protein intake using body weight and grams per pound.
DuBois Body Surface Area Calculator
Estimate body surface area using height and weight.
Calorie Deficit Calculator
Calculate a target calorie intake using maintenance calories and a chosen deficit.
Target Heart Rate Calculator
Estimate target heart rate using age, resting heart rate, and exercise intensity.
One Rep Max Calculator
Estimate your one-rep max using lifted weight and repetitions performed.
Pace Per Kilometer Calculator
Estimate running or walking pace per kilometer using time and distance.
Pace Per Mile Calculator
Estimate running or walking pace per mile using time and distance.
Walking Calories Calculator
Estimate calories burned while walking using minutes, body weight, and MET value.
Running Calories Calculator
Estimate calories burned while running using minutes, body weight, and MET value.
Target Body Fat Calculator
Estimate target body weight after cutting to a goal body fat percentage while maintaining lean mass.
BMI Prime Calculator
Calculate BMI Prime by dividing BMI by the healthy upper-range threshold of 25.
Waist to Height Ratio Calculator
Calculate waist-to-height ratio using waist and height in the same unit.
Lean Bulk Calorie Calculator
Estimate a lean bulk calorie target using maintenance calories and a surplus.
Protein Per Meal Calculator
Split a daily protein goal across a chosen number of meals.