BMI, ideal weight and calories compared
Body mass index is a quick screening measure of where your weight sits relative to your height. The ideal weight calculator puts four classic formulas — Devine, Robinson, Miller and Hamwi — side by side with the healthy range based on BMI, so you see a target range rather than a single number. If you want to lose or gain weight, the calorie calculator estimates your daily energy expenditure and suggests intake targets, with an optional macronutrient breakdown.
Pregnancy weeks and due date
The pregnancy calculator estimates your due date from the first day of your last period or from the conception date, and shows how many weeks pregnant you are and which trimester you are in. It also lists the weeks when key scans and screening tests usually take place. A due date is only an estimate and relatively few babies arrive exactly on it, so the date your midwife or doctor gives after an early ultrasound should take priority.
How to read the results
These calculators use formulas developed for the general adult population and are not a medical diagnosis. BMI can be misleading for muscular athletes, older adults, children and pregnant women. Treat the results as a starting point and talk to a healthcare professional if something looks clearly off. The height, weight and dates you enter are processed only in your browser and are not stored anywhere, so you can repeat the calculations as often as you like.