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Six science-backed calculators covering everything you need to track your health — from body composition to weight loss timelines.
WHO & NIH standard ranges for adult health indicators
| Metric | Underweight | Normal | Overweight | Obese |
|---|---|---|---|---|
| BMI Range | < 18.5 | 18.5 – 24.9 | 25 – 29.9 | ≥ 30 |
| Body Fat (men) | < 8% | 8–19% | 20–24% | ≥ 25% |
| Body Fat (women) | < 20% | 20–29% | 30–34% | ≥ 35% |
| Daily Water | — | 2–2.5L | 2.5–3L | 3L+ |
Get a baseline of where you are today. It takes 30 seconds.
Your TDEE determines everything. Eat at a deficit to lose, surplus to gain.
The scale lies. Body fat % tells you if you are losing fat or muscle.
The Weight Loss Calculator shows a sustainable path. Aim for 0.5–1 lb/week.
Science-backed reading to go alongside your numbers