❤️Health & Fitness
BMI, calorie, TDEE, macro, and body composition calculators.
Browse health calculators built to help with everyday tracking and planning. This category covers body measurements, nutrition estimates, fitness-related tools, and other common health calculations users often need in one place.
What You'll Find Here
This category is for users who want quick health-related estimates, including tools for body composition, calorie planning, daily energy use, weight guidance, sleep timing, and fitness pacing.
All Health & Fitness Tools
BMI Calculator
Use this BMI calculator to check your body mass index based on height and weight. Supports metric and US units with instant results and BMI category.
Open toolRunning Pace Calculator
Calculate running pace and speed from distance and finish time.
Open toolSleep Calculator
Plan better sleep cycles by calculating ideal bedtimes from wake time or ideal wake times from bedtime.
Open toolTDEE Calculator
Estimate your TDEE and BMR using weight, height, age, sex, and activity level.
Open toolMacro Calculator
Calculate daily macro targets in grams from your calorie target and macro percentages.
Open toolBody Fat Calculator
Estimate body fat percentage from weight, height, age, and sex using a formula-based method.
Open toolIdeal Weight Calculator
Estimate ideal body weight using height and sex with the Devine formula. View a practical target range in kg or lb.
Open toolCalorie Calculator
Estimate daily calorie needs using age, sex, height, weight, activity level, and goal.
Open toolPregnancy Due Date Calculator
Estimate pregnancy due date from last menstrual period using the standard 280-day gestation method.
Open toolOvulation Calculator
Estimate ovulation date, fertile window, and next period date using last period date and cycle length.
Open toolBMR Calculator
Use this BMR calculator to estimate basal metabolic rate using the Mifflin-St Jeor method based on age, sex, height, and weight.
Open toolProtein Calculator
Use this protein calculator to estimate daily protein intake from body weight and fitness goal assumptions.
Open toolWater Intake Calculator
Use this water intake calculator to estimate daily hydration based on body weight, activity, and climate assumptions.
Open toolOne Rep Max Calculator
Use this one rep max calculator to estimate 1RM from lifted weight and reps using the Epley formula.
Open toolCalories Burned Calculator
Use this calories burned calculator to estimate calories burned from activity, body weight, duration, and MET assumptions.
Open toolHeart Rate Zone Calculator
Use this heart rate zone calculator to estimate training heart rate zones using age-based max heart rate and optional resting heart rate.
Open toolCalorie Deficit Calculator
Estimate calorie deficit targets from BMR and activity level. Includes assumptions, limitations, and health disclaimer.
Open toolFeatured Tools
Calorie Calculator
Estimate daily calorie needs using age, sex, height, weight, activity level, and goal.
FeaturedPregnancy Due Date Calculator
Estimate pregnancy due date from last menstrual period using the standard 280-day gestation method.
FeaturedOvulation Calculator
Estimate ovulation date, fertile window, and next period date using last period date and cycle length.
Grouped by Topic
Health calculators are best used as practical guidance tools, not final medical conclusions. They can help users estimate patterns, compare options, and understand common formulas. The strongest health pages explain what the calculator measures, what it does not measure, and when a user may need more context beyond the number shown.