Health & fitness

Body metrics, calories, sleep and training zones — by the formulas medicine actually cites.

• BMI Calculator09·01Body mass index on the WHO adult scale, metric or imperial, with the normal-range weight for your height and the scale's limits stated plainly.
• Calorie Calculator (BMR & TDEE)09·02Your basal metabolism by Mifflin–St Jeor and your daily calories by activity level, with honest ±500 kcal bands for losing or gaining.
• Ideal Weight Calculator09·03Ideal body weight by Devine, Robinson, Miller and Hamwi — the formulas medicine actually cites — plus the healthy-BMI weight band for your height.
• Running Pace Calculator09·04Pace, finish time or distance — enter any two and get the third, with splits for 5K, 10K, half and the exact 42.195 km marathon.
• Body Fat Calculator09·05Body-fat percentage by the US Navy tape-measure method, with fat and lean mass split out and the ACE category bands — no calipers, no scan, no upload.
• Due Date Calculator09·06Pregnancy due date by Naegele's rule from the last period or conception, with gestational age in weeks and days and the trimester map.
• Heart Rate Zone Calculator09·07Five training zones from your age — by Tanaka, not the fossil 220 formula — and by Karvonen when you know your resting heart rate.
• Sleep Calculator09·08When to go to bed for a given alarm — or when to wake for a given bedtime — on whole 90-minute sleep cycles, counting the minutes falling asleep takes.