Reference charts for the numbers people look up most: BMI bands, body-fat ranges, calorie needs, water intake and healthy weight by height. These are the reference side of the site — the full distribution, how to read it, and who each band describes badly. If you want your own number rather than the whole table, the calculators do that.
Charts or calculators?
They answer different questions, and each chart here has a sibling calculator.
A calculator takes your measurements and returns one personal figure. Use it when you want to know where you specifically sit.
A chart shows the whole distribution and explains how to interpret it. Use it when you want context — what the categories mean, where the thresholds came from, and how much confidence they deserve.
So the BMI chart pairs with the BMI calculator, the body fat chart with the body fat calculator, the calorie needs chart with the TDEE calculator, the water intake chart with the water intake calculator, and the healthy weight chart with the ideal weight calculator.
Reading any health chart sensibly
Two habits make reference charts considerably more useful.
Treat category boundaries as gradients, not walls. A BMI of 24.9 and one of 25.1 describe indistinguishable bodies, and the same applies to every threshold on this site. These cut-offs were chosen because population risk begins curving upward somewhere around there, not because anything changes at the decimal place.
Cut-offs also vary by population. Several bodies apply lower BMI thresholds for people of South Asian and Chinese ancestry, who tend to develop cardiometabolic risk at lower values, and waist-circumference thresholds differ similarly.
Check whether the chart describes you. Almost all of these are derived from healthy adults aged roughly 18 to 65. Children, adolescents, pregnant people, athletes, and older adults are frequently poorly described by them, and each page says so explicitly.
A number outside a healthy band is a prompt to look further, not a diagnosis. Your blood pressure, blood glucose, fitness, sleep and how you actually feel predict your health considerably better than any ratio on this page.