Health Calculators
Free health calculators: check your BMI and ideal weight, work out daily calories and BMR, estimate body fat and find your pregnancy due date.
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All Health Calculators
Health Calculators Explained
Health calculators turn a few simple measurements into numbers that are easier to understand. The BMI Calculator shows your body mass index and the weight range that counts as healthy for your height. The Calorie Calculator works out your BMR and the calories you need each day to keep, lose or gain weight, and the Ideal Weight Calculator compares four well-known formulas. The Body Fat Calculator estimates your body fat from tape measurements, and the Due Date Calculator gives an estimated due date and the dates of each trimester. All of them work in metric or imperial units where it matters.
These tools are a starting point, not a diagnosis. BMI does not measure body fat or muscle, and it can be misleading for athletes, older adults, children and pregnant women. Calorie needs, ideal weights and due dates are all estimates. If you have a question about your health, your weight or your pregnancy, talk to a doctor, midwife or another qualified health professional.
Popular health calculators include BMI Calculator, Calorie Calculator, Ideal Weight Calculator and Due Date Calculator.
Frequently Asked Questions
Are the health calculators free to use?
Yes. Every health calculator on CalculatorEver is free, with no signup. The calculation happens in your browser, and your height, weight, dates and other details are not stored or sent to a server.
Which health calculator should I use?
Use the BMI Calculator to see whether your weight is in the healthy range for your height. Use the Calorie Calculator to find how many calories you need a day, and the Ideal Weight Calculator for ideal weight by formula. The Body Fat Calculator estimates how much of your weight is fat, and the Due Date Calculator is for pregnancy.
What is a healthy BMI?
For adults, the World Health Organization treats a BMI from 18.5 to 24.9 as the normal weight range. Below 18.5 is underweight, 25 to 29.9 is overweight and 30 or more is obese. These are general guides and do not suit everyone.
Can these calculators replace medical advice?
No. They give general information only and cannot diagnose or treat anything. For advice about your own health or pregnancy, speak to a doctor, midwife or another qualified health professional.
