{"uid":"cap_sKCTFavUZRUQfS-OuDapd","slug":"harris-benedict-1919-basal-energy-expenditure-calculator-2682ae02","name":"Harris–Benedict 1919 Basal Energy Expenditure Calculator","description":"Harris–Benedict 1919 basal energy expenditure (kcal/day) from height, weight, age, and sex. Deterministic published formula with citation; not a nutrition prescription.","url":"https://api.magentlab.com/api/calc/bee_harris_benedict","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","HEAD","DELETE"],"type":"string"},"headers":{"type":"object","additionalProperties":{"type":"string"}},"queryParams":{"type":"object","required":["age","sex"],"properties":{"age":{"type":"integer","description":"Age in years (18-120)."},"sex":{"enum":["female","male"],"type":"string","description":"Sex used by Harris–Benedict 1919 (separate male and female equations)."},"height_cm":{"type":"number","description":"Height in centimeters. Provide height_cm or height_in."},"height_in":{"type":"number","description":"Height in inches. Converted as cm = in * 2.54."},"weight_kg":{"type":"number","description":"Weight in kilograms. Provide weight_kg or weight_lb."},"weight_lb":{"type":"number","description":"Weight in pounds. Converted as kg = lb * 0.45359237."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"path":"/api/calc/bee_harris_benedict","count":2,"items":[{"sex":"male","units":"kcal/day","formula":"harris_benedict_1919","citation":{"id":"harris-benedict-1919","doi":null,"title":"A Biometric Study of Basal Metabolism in Man","source":"Carnegie Institution of Washington Publication No. 279; 1919","authors":"Harris JA, Benedict FG"},"age_years":25,"height_cm":175,"weight_kg":70,"disclaimer":"Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.","bee_kcal_day":1735.8,"formula_expression":"BEE_kcal_day = 66.4730 + 13.7516*kg + 5.0033*cm - 6.7550*age (male); BEE_kcal_day = 655.0955 + 9.5634*kg + 1.8496*cm - 4.6756*age (female)"},{"sex":"male","units":"kcal/day","formula":"harris_benedict_1919","citation":{"id":"harris-benedict-1919","doi":null,"title":"A Biometric Study of Basal Metabolism in Man","source":"Carnegie Institution of Washington Publication No. 279; 1919","authors":"Harris JA, Benedict FG"},"age_years":25,"height_cm":175,"weight_kg":70,"disclaimer":"Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.","bee_kcal_day":1735.8,"formula_expression":"BEE_kcal_day = 66.4730 + 13.7516*kg + 5.0033*cm - 6.7550*age (male); BEE_kcal_day = 655.0955 + 9.5634*kg + 1.8496*cm - 4.6756*age (female)"}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_JjpYZMbR2lIMyBeREPGRd","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates basal energy expenditure (kcal/day) using the original Harris–Benedict 1919 formula from height, weight, age, and sex","exampleAgentPrompt":"What's the Harris–Benedict 1919 basal energy expenditure for a 35-year-old male who is 178 cm tall and weighs 82 kg?","exampleUseCases":[{"title":"Clinical nutrition baseline for a patient","prompt":"Calculate the Harris–Benedict basal energy expenditure for a 52-year-old female patient who is 5 feet 4 inches tall and weighs 145 pounds — I need the kcal/day figure for her nutrition chart."},{"title":"Pre-diet caloric baseline for a fitness app","prompt":"What's the resting calorie burn using the Harris–Benedict 1919 formula for a 28-year-old male, 183 cm, 90 kg? I need the BEE before applying an activity multiplier."},{"title":"Prior authorization metabolic documentation","prompt":"Compute the Harris–Benedict 1919 basal energy expenditure for a 61-year-old female who is 160 cm tall and weighs 95 kg — I need the kcal/day value with the published formula citation for the prior-auth paperwork."}],"resultDescription":"Returns the basal energy expenditure in kcal/day computed from the Harris–Benedict 1919 sex-specific equations, along with a citation to the original publication. The result is deterministic and reproducible given the same inputs.","failureModes":["Missing required parameters (age or sex) returns a 400-level error","Age outside the 18–120 range may be rejected or produce out-of-scope results","Neither height_cm/height_in nor weight_kg/weight_lb provided causes calculation failure","Invalid sex enum value (not 'male' or 'female') returns an error","Payment failure via x402 protocol returns 402 Payment Required"],"whenToPreferThis":"Choose this endpoint when you need a deterministic, citeable Harris–Benedict 1919 BEE value — particularly for clinical documentation, prior-authorization workflows, or any context requiring a published-formula reference. Prefer it over modern revised equations (e.g. Mifflin-St Jeor) when the 1919 original formula is specifically required. It accepts both metric and imperial unit inputs, making it convenient without manual conversion.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T01:15:00.148Z","isFirstParty":false}