SimpleBMI is a free BMI calculator that does more than show a number — it tells you your healthy weight range, how far you are from it, and what your score means. Plus body-fat, BMR/TDEE, ideal-weight, waist-to-height and a kids' BMI-for-age tool. No signup, mobile-first.
Hey PH 👋 I built SimpleBMI because every BMI tool just gives you a number and a label. This one explains it: your exact healthy weight range for your height, how far off you are, and the honest caveats (BMI can't tell muscle from fat). It's free, no signup, and there are extra tools for body fat, BMR/TDEE, ideal weight and kids' BMI. Would love your feedback on what else to add.
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Does the kids' BMI-for-age tool use CDC or WHO percentiles, and does it factor in growth stage or just raw age?
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Love that it skips the signup and goes straight to the numbers, especially handy for a quick check on the phone. The kids' BMI-for-age tool is a thoughtful addition most calculators skip.
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The fact that it actually tells you what your BMI number means instead of just leaving you to Google it is such a thoughtful touch. Love that there's no signup wall either.
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Does the kids' BMI-for-age tool use CDC or WHO percentiles, and does it factor in growth stage or just raw age?
Love that it skips the signup and goes straight to the numbers, especially handy for a quick check on the phone. The kids' BMI-for-age tool is a thoughtful addition most calculators skip.
The fact that it actually tells you what your BMI number means instead of just leaving you to Google it is such a thoughtful touch. Love that there's no signup wall either.