health calculators
Health calculators
Tools to track weight, calories, menstrual cycle, and pregnancy without needing an app. Enter your values and get instant results, with no sign-up required and no ads hiding your answer.
All tools
BMI Calculator
Find out your body mass index in seconds.
+Daily Calories (BMR)
Discover your estimated daily calorie expenditure.
+Recommended Daily Water Intake
How much water to drink per day based on weight and activity.
+Ideal Weight
4 anthropometric formulas, distinct from BMI.
+Body Fat Percentage
Calculate using a tape measure, no special equipment required.
+Pregnancy Calculator
Estimated due date and gestational weeks.
+Fertile Window & Menstrual Cycle
Ovulation, fertile window, and next period.
+Physical Activity Calorie Burn
Complements BMR: calories burned per exercise.
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Frequently Asked Questions
What is the difference between BMI and body fat percentage?
BMI relies solely on weight and height, so it cannot distinguish lean muscle mass from fat. Body fat percentage measures actual body composition, offering a more precise metric for athletes or individuals with significant muscle mass.
How is BMR (basal metabolic rate) calculated?
BMR estimates the number of calories your body burns at rest based on weight, height, age, and sex. We then apply a physical activity multiplier to determine your total daily energy expenditure.
Can the fertile window calculator be used as a contraceptive method?
No. It provides an estimate based on average menstrual cycle lengths and serves as a general reference, not as a birth control or family planning method. Please consult a healthcare professional for guidance.