{"$schema":"https://toolsly.tools/schemas/tool-manifest-v1.json","generated":"2026-10-20T13:00:48.417Z","discovery":{"catalog":"https://toptool.io/free-tools/tools.json","llmsTxt":"https://toptool.io/free-tools/llms.txt","sitemap":"https://toptool.io/free-tools/sitemap.xml"},"relatedTools":[{"slug":"weight-converter","name":"Weight Converter","url":"https://toptool.io/free-tools/weight-converter"},{"slug":"percentage-calculator","name":"Percentage Calculator","url":"https://toptool.io/free-tools/percentage-calculator"},{"slug":"age-calculator","name":"Age Calculator","url":"https://toptool.io/free-tools/age-calculator"},{"slug":"length-converter","name":"Length Converter","url":"https://toptool.io/free-tools/length-converter"},{"slug":"date-difference","name":"Date Difference Calculator","url":"https://toptool.io/free-tools/date-difference"},{"slug":"aspect-ratio-calculator","name":"Aspect Ratio Calculator","url":"https://toptool.io/free-tools/aspect-ratio-calculator"},{"slug":"volume-converter","name":"Volume Converter","url":"https://toptool.io/free-tools/volume-converter"},{"slug":"discount-calculator","name":"Discount Calculator","url":"https://toptool.io/free-tools/discount-calculator"}],"kind":"utility","slug":"bmi-calculator","name":"BMI Calculator","description":"Compute Body Mass Index from height and weight in either metric or imperial units.","longDescription":"BMI is computed as weight (kg) ÷ height (m)². This tool accepts metric (cm + kg) or imperial (ft + in + lb) inputs and reports the WHO category (underweight, normal, overweight, obese class I/II/III). Runs locally in your browser — your data is never sent anywhere.","category":"calc","categoryName":"Calculators","keywords":["bmi calculator","body mass index calculator","bmi calculator online","bmi calculator free","calculate bmi","bmi formula","metric bmi calculator","imperial bmi calculator","weight calculator","health bmi","bmi check","online bmi"],"badge":"Calculator","runsOn":"client","url":"https://toptool.io/free-tools/bmi-calculator","inputs":[{"type":"select","key":"units","label":"Units","defaultValue":"metric","choices":[{"value":"metric","label":"Metric (cm, kg)"},{"value":"imperial","label":"Imperial (in, lb)"}]},{"type":"number","key":"height","label":"Height","defaultValue":175,"min":1,"step":0.1,"help":"Centimeters in metric mode, inches in imperial mode."},{"type":"number","key":"weight","label":"Weight","defaultValue":70,"min":1,"step":0.1,"help":"Kilograms in metric mode, pounds in imperial mode."}],"outputs":[{"key":"bmi","label":"BMI"},{"key":"category","label":"Category"},{"key":"heightMeters","label":"Height (m)"},{"key":"weightKg","label":"Weight (kg)"}],"invocation":{"webUi":"https://toptool.io/free-tools/bmi-calculator","api":null,"notes":"Use the web UI to enter inputs and view the result; there is no public execution API."}}