Health calculators that
actually keep your data private
Free everyday health calculators: BMI, calorie needs (TDEE), body fat percentage, heart rate zones, daily water intake, sleep cycle, pregnancy due date and child vaccination schedule.
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Tools to help you understand, not diagnose
Every calculator in VitalCalc is built on well-known, widely used public-health formulas — from the World Health Organization's standard Body Mass Index formula to the Mifflin-St Jeor equation for daily calorie needs. These tools are designed to help you understand your numbers, not to diagnose or treat anything; always talk to a doctor about decisions affecting your personal health.
Every calculation runs entirely inside your browser — your height, weight, waist measurement or any other number you enter is never sent to a server. Use these tools as often as you like, with no sign-up and no cost.