Health calculators
Estimate BMI, daily calories, macros, protein needs or how many weeks pregnant you are. Each page names the equation it uses, like Mifflin-St Jeor for BMR, and links to the health body behind the ranges.
These are estimates for adults, not a diagnosis. Talk to a doctor or dietitian before a big change to diet or training.
HealthBMI CalculatorCalculate adult BMI, category, height-specific weight boundaries, BMI Prime, ponderal index, and optional waist-to-height context.HealthTDEE CalculatorModel adult total daily energy expenditure from Mifflin-St Jeor resting energy and a visible activity-multiplier scenario.HealthBMR CalculatorEstimate adult resting energy with Mifflin-St Jeor, compare revised Harris-Benedict, and audit every formula component.HealthCalorie Deficit CalculatorCompare an entered maintenance estimate with planned intake, a daily energy gap, or a static weekly-change shorthand without presenting the arithmetic as a weight forecast.HealthIdeal Weight CalculatorCompare four historical adult ideal-body-weight formulas with an exact BMI screening interval and a BMI-linked Peterson estimate, without presenting any result as a personal target.HealthSleep CalculatorPlan time in bed from a wake time or bedtime, or audit an overnight window with age-based duration context and an optional 80-100 minute cycle model.HealthPregnancy CalculatorEstimate due date, gestational age, trimester, term dates, and pregnancy milestones from LMP, a known due date, conception, ultrasound dating, or IVF transfer.HealthMacro CalculatorBuild an adult macro planning scenario from estimated or custom calories, then compare protein, carbohydrate, fat, fiber, and per-meal values.HealthProtein CalculatorCompare adult protein reference ranges from body weight, then review daily grams, an even meal split, calorie contribution, and current-intake context.