Health
Body measures with switchable WHO, Asian, and clinic cutoffs — BMI screening plus BMR/TDEE calorie estimates and educational IQ percentile tools.
- BMI calculatorWeight ÷ height² with WHO, Asian, or JASSO Japan cutoffs. The number stays the same; the category label follows the table you select.
- Ovulation calculatorEstimate your ovulation day and fertile window from the first day of your last period and average cycle length. Educational calendar estimate only — not a substitute for clinical advice.
- Calorie calculatorMifflin–St Jeor BMR from mass, height, age, and sex, then activity multipliers for a rough daily energy estimate.
- Pregnancy Due Date CalculatorFind your estimated due date from your last period, conception date or IVF transfer, and see how many weeks pregnant you are, your trimester and the key dates ahead.
- TDEE calculatorFind your total daily energy expenditure — the calories you burn in a day — from your BMR and activity level, then see targets to lose, maintain or gain weight.
- IQ percentile calculatorMap an IQ to a percentile and band on the SD 15 or SD 16 normal curve. Educational estimate — not a clinical Wechsler administration.
- IQ rarity calculatorTurn an IQ into “1 in N score this high or higher,” with percentile cross-check. Normal-curve illustration only.
- Blood alcohol (BAC) calculatorAdd what you drank and when. You get your estimated peak and current blood alcohol, plus how long until you are below your country's driving limit and back to 0.0 ‰ — at a typical and at a slow elimination rate.
- Body fat calculatorMeasure your neck and waist (and hips for women) with a tape measure. You get your body fat percentage by the U.S. Navy method, your fat and lean mass, a BMI-based cross-check and where you sit on the ACE chart.
- One rep max calculator (1RM)Enter a weight and how many clean reps you did. You get your estimated one rep max from Epley, Brzycki and Lombardi, and a percentage chart for planning sets — no risky max attempt needed.
- Sleep calculatorEnter the time you need to wake up and get bedtimes that let you finish full 90-minute sleep cycles, or enter your bedtime to see the best times to set your alarm.