{"ok":true,"result":{"slug":"body-fat-calculator","name":"Body Fat Calculator","summary":"Body fat percentage by the US Navy circumference method, with the ACE category and (given a weight) fat and lean mass.","description":"Estimate body fat percentage from height, neck, waist and hip measurements with the US Navy tape method, plus your ACE category, fat mass and lean mass.","method":"POST","endpoint":"/api/v1/tools/body-fat-calculator","plan":"free","mcpName":"body_fat_calculator","input":{"type":"object","additionalProperties":false,"properties":{"sex":{"type":"string","description":"male or female; the formula differs (women also need hip).","enum":["male","female"],"maxLength":200000},"units":{"type":"string","description":"metric: centimetres and kilograms. imperial: inches and pounds.","default":"metric","enum":["metric","imperial"],"maxLength":200000},"height":{"type":"number","description":"Height (100 to 250 cm, or 39 to 98 in).","minimum":0},"neck":{"type":"number","description":"Neck circumference, just below the larynx.","minimum":0},"waist":{"type":"number","description":"Waist circumference: at the navel for men, at the narrowest point for women.","minimum":0},"hip":{"type":"number","description":"Hip circumference at the widest point. Required for female, ignored for male.","minimum":0},"weight":{"type":"number","description":"Optional body weight (kg or lb) to also get fat mass and lean mass.","minimum":0}},"required":["sex","height","neck","waist"]},"example":{"sex":"male","units":"metric","height":180,"neck":38,"waist":85,"weight":80},"randomOutput":false,"network":false,"docs":"https://pithlab.com/developers/tools/body-fat-calculator","page":"https://pithlab.com/tools/body-fat-calculator"}}