Fitness
BMI Calculator
Use OmniCalc's BMI calculator to estimate body mass index from your height and weight and understand the result clearly.
Fitness
Use fitness calculators for BMI, calorie needs, TDEE, macros, body fat, healthy weight, and everyday body-composition planning without extra friction.
Featured calculators
These are the best starting points when you want a fast answer without digging through the full list first.
The fitness calculator hub helps people estimate BMI, calorie needs, TDEE, macro targets, body-fat-related metrics, healthy-weight ranges, and other practical body-composition numbers without unnecessary friction. These tools are built for planning and everyday use, so visitors can get a fast estimate, understand what it means, and move into the next nutrition or health decision with more confidence.
Fitness
Use OmniCalc's BMI calculator to estimate body mass index from your height and weight and understand the result clearly.
Fitness
Use OmniCalc's calorie calculator to estimate daily calorie needs for maintenance, weight loss, or weight gain goals.
Fitness
Use OmniCalc's TDEE calculator to estimate maintenance calories and practical cut or bulk targets from your size, age, and activity level.
Fitness
Use OmniCalc's macro calculator to split a calorie target into practical daily protein, carb, and fat numbers.
Fitness
Use OmniCalc's body fat calculator to estimate body fat percentage, fat mass, and lean mass from practical body measurements.
Fitness
Use OmniCalc's healthy weight calculator to estimate a BMI-based healthy weight range from your height.
Fitness
Use OmniCalc's ideal weight calculator to estimate a reference target based on height and sex, then compare it with a broader healthy weight range.
Fitness
Use OmniCalc's overweight calculator to estimate BMI, identify overweight-range status, and compare current weight with the standard threshold for height.
Fitness
Use OmniCalc's body type calculator to estimate ectomorph, mesomorph, or endomorph tendencies from basic body-composition measurements.
Fitness
Use OmniCalc's protein calculator to estimate daily protein intake for general health, muscle gain, fat loss, or endurance training.
Fitness
Use OmniCalc's fat intake calculator to convert your daily calorie goal and chosen fat percentage into grams you can actually plan around.
Fitness
Use OmniCalc's carbohydrate calculator to convert your daily calorie goal and chosen carbohydrate percentage into grams you can use for meal planning and fueling.
Fitness
Use OmniCalc's BMR calculator to estimate the calories your body needs at rest based on age, sex, height, and weight.
Fitness
Use OmniCalc's lean body mass calculator to estimate lean body mass, lean-mass percentage, and simple fat-mass context from your height and weight.
Fitness
Use OmniCalc's Army body fat calculator to estimate body fat from circumference measurements and compare your result with age-banded standards.
Fitness
Use OmniCalc's weight watcher points calculator to estimate total points and points per serving from calories, fat, fiber, and serving count.
Fitness
Use OmniCalc's anorexic BMI calculator to estimate BMI and compare current weight with underweight and severe-underweight BMI thresholds.
Full list
Use the full list below when you already know the kind of calculation you need to run.
Fitness
Use OmniCalc's weight watcher points calculator to estimate total points and points per serving from calories, fat, fiber, and serving count.
Fitness
Use OmniCalc's anorexic BMI calculator to estimate BMI and compare current weight with underweight and severe-underweight BMI thresholds.
Fitness
Use OmniCalc's overweight calculator to estimate BMI, identify overweight-range status, and compare current weight with the standard threshold for height.
Fitness
Use OmniCalc's body type calculator to estimate ectomorph, mesomorph, or endomorph tendencies from basic body-composition measurements.
Fitness
Use OmniCalc's BAC calculator to estimate blood alcohol concentration from drinks consumed, drink size, alcohol strength, body weight, and time elapsed.
Fitness
Use OmniCalc's body surface area calculator to estimate BSA from height and weight with several common formulas.
Fitness
Use OmniCalc's GFR calculator to estimate kidney filtration from serum creatinine, age, and sex.
Fitness
Use OmniCalc's Army body fat calculator to estimate body fat from circumference measurements and compare your result with age-banded standards.
Fitness
Use OmniCalc's carbohydrate calculator to convert your daily calorie goal and chosen carbohydrate percentage into grams you can use for meal planning and fueling.
Fitness
Use OmniCalc's fat intake calculator to convert your daily calorie goal and chosen fat percentage into grams you can actually plan around.
Fitness
Use OmniCalc's one rep max calculator to estimate your 1RM from a hard set and turn that estimate into training loads for strength programming.
Fitness
Use OmniCalc's target heart rate calculator to estimate cardio training zones from age and resting pulse so you can pace workouts more intentionally.
Fitness
Use OmniCalc's calories burned calculator to estimate how much energy a workout or activity session uses based on your body weight, chosen exercise, and total duration.
Fitness
Use OmniCalc's pace calculator to translate a workout or race time into pace per kilometer, pace per mile, and related training numbers.
Fitness
Use OmniCalc's period calculator to estimate when the next period may begin and where you are in the current cycle.
Fitness
Use OmniCalc's pregnancy weight gain calculator to compare current weight gain with guideline-based ranges for pregnancy planning.
Fitness
Use OmniCalc's pregnancy calculator to estimate how far along a pregnancy is and how much time remains until the due date.
Fitness
Use OmniCalc's ovulation calculator to estimate when ovulation may occur and when the fertile window is most likely to open and close.
Fitness
Use OmniCalc's due date calculator to estimate your due date and pregnancy timing milestones from a few common starting points.
Fitness
Use OmniCalc's BMI calculator to estimate body mass index from your height and weight and understand the result clearly.
Fitness
Use OmniCalc's calorie calculator to estimate daily calorie needs for maintenance, weight loss, or weight gain goals.
Fitness
Use OmniCalc's BMR calculator to estimate the calories your body needs at rest based on age, sex, height, and weight.
Fitness
Use OmniCalc's ideal weight calculator to estimate a reference target based on height and sex, then compare it with a broader healthy weight range.
Fitness
Use OmniCalc's sleep calculator to estimate bedtime options based on your target wake-up time and full sleep-cycle planning.
Fitness
Use OmniCalc's body fat calculator to estimate body fat percentage, fat mass, and lean mass from practical body measurements.
Fitness
Use OmniCalc's TDEE calculator to estimate maintenance calories and practical cut or bulk targets from your size, age, and activity level.
Fitness
Use OmniCalc's macro calculator to split a calorie target into practical daily protein, carb, and fat numbers.
Fitness
Use OmniCalc's protein calculator to estimate daily protein intake for general health, muscle gain, fat loss, or endurance training.
Fitness
Use OmniCalc's lean body mass calculator to estimate lean body mass, lean-mass percentage, and simple fat-mass context from your height and weight.
Fitness
Use OmniCalc's healthy weight calculator to estimate a BMI-based healthy weight range from your height.
FAQ
Short, plain-language answers that help explain what these calculators are for and how to use them well.
Question
A good fitness calculator should be easy to use, clear about what it measures, and practical enough to support a real decision. The result should be understandable without needing expert knowledge just to interpret it.
Question
No. OmniCalc fitness tools are informational calculators built for planning and estimation. They can help users understand common health metrics, but they are not a replacement for diagnosis, medical care, or professional advice.
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