Health & Fitness Calculators
10 free calculators — instant results, no sign-up
BMI Calculator
Body Mass Index from height and weight.
BMR Calculator
Basal Metabolic Rate calories per day.
Calorie Calculator
Daily calorie needs based on activity.
Ideal Weight Calculator
Ideal body weight range for your height.
Body Fat Calculator
Estimated body fat percentage.
Water Intake Calculator
Daily water intake recommendation.
Pregnancy Calculator
Pregnancy week and trimester tracker.
Due Date Calculator
Estimated delivery date from LMP.
Macro Calculator
Daily protein, carbs and fat targets.
BMI Prime Calculator
BMI prime ratio relative to upper normal.
About Health & Fitness Calculators
Our health & fitness calculators are free, accurate, and easy to use. Each tool uses standard industry formulas and updates results in real time as you adjust inputs. All calculations run entirely in your browser — no data is stored or shared. Whether you are planning a major financial decision or solving a quick everyday problem, our 10 health & fitness tools have you covered. Browse the full list above and click any calculator to get started instantly.