Calculator collection
Health calculators
Choose a tool, enter your numbers and see both the result and the method behind it.
BMI Calculator
Calculate adult body mass index, weight category and the weight range associated with BMI 18.5–24.9.
01BMR Calculator
Estimate adult resting energy expenditure with the Mifflin–St Jeor equation.
02TDEE Calculator
Estimate total daily energy expenditure from resting energy and an explicit activity factor.
03Calorie Calculator
Estimate adult maintenance calories and transparent intake scenarios for gradual weight change.
04Body Fat Calculator
Estimate adult body fat percentage from BMI, age and sex using the published Deurenberg equation.
05Macro Calculator
Convert a calorie target and macronutrient percentages into grams of protein, carbohydrate and fat.
06Height Calculator
Convert adult height or estimate a child's adult height from parental heights with the mid-parental method.
07Pregnancy Calculator
Estimate a due date and gestational timeline from LMP, conception or an IVF transfer date.
08Ideal Weight Calculator
Compare four historical adult reference-weight equations with a BMI-based range for height.
09Calories Burned Calculator
Estimate activity energy expenditure from body weight, duration and a published MET value.
10Pace Calculator
Calculate running or walking pace, speed and projected finish times from distance and elapsed time.
11Protein Calculator
Calculate a transparent daily protein reference from body weight, life-stage factors or a custom grams-per-kilogram target.
12Bra Size Calculator
Estimate a starting bra size from underbust and full-bust measurements, with US, UK and EU displays.
13Pregnancy Conception Calculator
Estimate conception timing from a last menstrual period or due date using transparent obstetric dating assumptions.
14Ovulation Calculator
Estimate ovulation, the fertile interval and upcoming cycle dates from LMP and average cycle length.
15Body Type Calculator
Compare shoulder, bust, waist and hip proportions using a transparent apparel-shape heuristic.
16Period Calculator
Project upcoming period dates and cycle days from a recorded start date, average cycle and bleeding length.
17Sleep Calculator
Plan an evidence-based bedtime from wake time or calculate sleep duration after latency and awake time.
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