{"uid":"cap_NhTXQwGjs0VFlo1C0wwmP","slug":"saylor-innovations-bmr-body-metrics-calculator-8d3cdff6","name":"Saylor Innovations BMR & Body Metrics Calculator","description":"BMI, healthy weight range, BMR, daily calories (TDEE) by activity level, calories to lose or gain, body surface area and ideal weight","url":"https://saylorinnovations.com/api/health/bmr?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["sex","age","weight","height"],"properties":{"age":{"type":"string","description":"Age in years"},"sex":{"type":"string","description":"male or female"},"height":{"type":"string","description":"Height in cm (inches if units=imperial)"},"weight":{"type":"string","description":"Weight in kg (lb if units=imperial)"},"activity":{"type":"string","description":"optional sedentary (default), light, moderate, active, very_active"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string","const":"json"},"example":{"type":"object","required":["bmi","bmr_kcal_per_day","tdee_kcal_per_day"],"properties":{"age":{"type":"number","description":"Age in years"},"bmi":{"type":"number","description":"Body mass index"},"sex":{"type":"string","description":"Sex used in the equations"},"note":{"type":"string","description":"Caveat or context for reading the result"},"source":{"type":"string","description":"Data source the values come from"},"activity":{"type":["string","null"],"description":"Activity level used for TDEE"},"height_cm":{"type":["number","null"],"description":"Height in centimetres"},"weight_kg":{"type":["number","null"],"description":"Weight in kilograms"},"bmi_category":{"type":"string","description":"Bmi category"},"activity_factor":{"type":["number","null"],"description":"Activity factor"},"bmr_kcal_per_day":{"type":"number","description":"Bmr kcal per day"},"tdee_kcal_per_day":{"type":"number","description":"Tdee kcal per day"},"body_surface_area_m2":{"type":"number","description":"Body surface area, in square metres"},"ideal_weight_devine_kg":{"type":["number","null"],"description":"Ideal weight devine, in kilograms"},"healthy_weight_range_kg":{"type":"array","description":"Healthy weight range, in kilograms"},"calories_to_gain_0_5kg_per_week":{"type":["number","null"],"description":"Calories to gain 0 5kg per week"},"calories_to_lose_0_5kg_per_week":{"type":["number","null"],"description":"Calories to lose 0 5kg per week"}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ADQcM_zFku6fhAK9MnN91","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates BMI, BMR, TDEE by activity level, healthy weight range, calories to lose or gain, body surface area, and ideal weight from basic biometric inputs","exampleAgentPrompt":"What's my BMR and daily calorie needs? I'm a 32-year-old male, 180 cm tall, 85 kg, and I'd say I'm moderately active.","exampleUseCases":[{"title":"Daily calorie budget for weight loss","prompt":"I'm a 28-year-old woman, 165 cm, 72 kg, and I go to the gym 3 times a week — so moderate activity. Can you calculate my TDEE and tell me how many calories I should eat to lose weight?"},{"title":"BMI check during annual health review","prompt":"Can you calculate my BMI and tell me what category I fall into? I'm a 45-year-old male, 5 foot 10 inches tall and 190 pounds — use imperial units."},{"title":"Ideal weight and body surface area for medical planning","prompt":"I need my ideal weight and body surface area for a health assessment — I'm female, 38 years old, 160 cm tall and 64 kg, sedentary lifestyle."}],"resultDescription":"A JSON object containing BMI value and category, BMR in kcal/day, TDEE in kcal/day (adjusted for activity level), activity factor multiplier, body surface area in square metres, ideal weight via Devine formula, height in cm, weight in kg, sex, age, and a note with contextual caveats about the result.","failureModes":["Missing required query parameters (sex, age, weight, height) returns an error","Invalid or out-of-range values (e.g. negative age, zero weight) may produce nonsensical results","Unsupported activity level string falls back to sedentary default","Imperial unit values passed without units=imperial flag produce incorrect calculations"],"whenToPreferThis":"Choose this endpoint when you need a comprehensive body metrics calculation in a single call — covering BMI, BMR, TDEE, ideal weight, and body surface area together rather than calling separate health APIs. Ideal for fitness apps, health dashboards, nutrition planning agents, or any workflow where multiple biometric metrics are needed simultaneously from minimal inputs.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T12:56:37.532Z","isFirstParty":false,"canonicalSlug":"saylor-innovations-bmr-body-metrics-calculator-8d3cdff6"}