{"success":true,"version":"v1","request":{"tool":"get_calculator_schema","calculator_id":"calories-burned"},"result":{"entity_type":"calculator","id":"calories-burned","calculator_id":"calories-burned","canonical_url":"https://tttkmbb.com/fitness/calories-burned","name":"Calories Burned Calculator","title":"Calories Burned Calculator – Energy Expenditure by Activity, Weight and Duration (MET values)","category":"fitness","category_name":"Sports & Fitness","tool_name":"estimate_calories_burned","featured_mcp_tool":false,"description":"Estimates the calories burned during an activity from body weight, duration and the activity's MET value from the 2011 Compendium of Physical Activities, using the ACSM metabolic equation kcal/min = MET × 3.5 × kg / 200.","use_when":"You need an estimate of energy expenditure for a workout, sport or chore of known duration for a person of known weight.","do_not_use_when":"You need total daily calorie needs (use tdee) or resting expenditure (use bmr); MET values are population averages and ignore fitness level, terrain and intensity within a category.","inputs":[{"name":"weight_kg","label":"Weight","type":"number","unit":"kg","required":true,"max":700,"exclusive_min":0,"description":"Body weight in kilograms.","example":70},{"name":"duration_minutes","label":"Duration","type":"number","unit":"min","required":true,"max":1440,"exclusive_min":0,"description":"Duration of the activity in minutes.","example":30},{"name":"activity","label":"Activity","type":"enum","required":true,"values":[{"value":"walking_3_5_mph","label":"Walking 3.5 mph / 5.6 km/h, brisk (MET 4.3)","aliases":["walking","walk","brisk walking"]},{"value":"running_6_mph","label":"Running 6 mph / 9.7 km/h, 10 min per mile (MET 9.8)","aliases":["running","run","jogging"]},{"value":"running_8_mph","label":"Running 8 mph / 12.9 km/h, 7.5 min per mile (MET 11.8)","aliases":["fast running"]},{"value":"cycling_moderate","label":"Cycling 10–12 mph / 16–19 km/h, moderate (MET 6.8)","aliases":["cycling","biking","bicycling"]},{"value":"swimming_laps_moderate","label":"Swimming laps, freestyle, moderate (MET 5.8)","aliases":["swimming","swim"]},{"value":"weight_training","label":"Weight training, multiple exercises (MET 3.5)","aliases":["weights","lifting","strength training","resistance training"]},{"value":"yoga","label":"Yoga, Hatha (MET 2.5)","aliases":[]},{"value":"hiking","label":"Hiking, cross-country (MET 6.0)","aliases":["hike"]},{"value":"jump_rope","label":"Jump rope, general (MET 11.0)","aliases":["skipping","jumping rope","rope skipping"]},{"value":"rowing_moderate","label":"Rowing machine, moderate (MET 7.0)","aliases":["rowing","erg"]},{"value":"elliptical","label":"Elliptical trainer, moderate (MET 5.0)","aliases":["cross trainer"]},{"value":"basketball","label":"Basketball, general (MET 6.5)","aliases":[]},{"value":"soccer","label":"Soccer, casual (MET 7.0)","aliases":["football"]},{"value":"tennis","label":"Tennis, general (MET 7.3)","aliases":[]},{"value":"dancing","label":"Dancing, general / low-impact aerobic (MET 5.0)","aliases":["dance"]},{"value":"housework","label":"Housework, cleaning, general (MET 3.3)","aliases":["cleaning","chores"]}],"description":"Activity and intensity; each maps to a MET value from the 2011 Compendium of Physical Activities.","example":"running_6_mph"}],"outputs":[{"name":"calories_kcal","label":"Calories burned","type":"number","unit":"kcal","decimals":0,"description":"Gross energy expenditure for the session (includes resting metabolism during that time)."},{"name":"kcal_per_minute","label":"Burn rate","type":"number","unit":"kcal/min","decimals":2,"description":"Energy expenditure per minute."},{"name":"kcal_per_hour","label":"Burn rate per hour","type":"number","unit":"kcal/h","decimals":0,"description":"Energy expenditure per hour of the activity."},{"name":"met","label":"MET value","type":"number","unit":"MET","decimals":1,"description":"Metabolic equivalent of the activity (1 MET = 3.5 ml O2/kg/min, resting)."},{"name":"activity_label","label":"Activity","type":"string","decimals":4,"description":"Activity description used, with its MET value."}],"input_schema":{"type":"object","properties":{"weight_kg":{"description":"Body weight in kilograms. Unit: kg.","type":"number","maximum":700,"exclusiveMinimum":0,"examples":[70],"x-unit":"kg"},"duration_minutes":{"description":"Duration of the activity in minutes. Unit: min.","type":"number","maximum":1440,"exclusiveMinimum":0,"examples":[30],"x-unit":"min"},"activity":{"description":"Activity and intensity; each maps to a MET value from the 2011 Compendium of Physical Activities.","type":"string","enum":["walking_3_5_mph","running_6_mph","running_8_mph","cycling_moderate","swimming_laps_moderate","weight_training","yoga","hiking","jump_rope","rowing_moderate","elliptical","basketball","soccer","tennis","dancing","housework"],"examples":["running_6_mph"]}},"additionalProperties":false,"required":["weight_kg","duration_minutes","activity"]},"output_schema":{"type":"object","properties":{"calories_kcal":{"description":"Gross energy expenditure for the session (includes resting metabolism during that time). Unit: kcal.","type":"number","x-unit":"kcal"},"kcal_per_minute":{"description":"Energy expenditure per minute. Unit: kcal/min.","type":"number","x-unit":"kcal/min"},"kcal_per_hour":{"description":"Energy expenditure per hour of the activity. Unit: kcal/h.","type":"number","x-unit":"kcal/h"},"met":{"description":"Metabolic equivalent of the activity (1 MET = 3.5 ml O2/kg/min, resting). Unit: MET.","type":"number","x-unit":"MET"},"activity_label":{"description":"Activity description used, with its MET value.","type":"string"}}},"formula":"kcal_per_minute = MET × 3.5 × weight_kg / 200; calories_kcal = kcal_per_minute × duration_minutes","method":"3.5 ml O2/kg/min is the resting oxygen uptake of 1 MET and 1 litre of O2 corresponds to about 5 kcal, giving kcal/min = MET × 3.5 × kg / 200. Net calories above rest are roughly (MET − 1) / MET of the gross value.","sources":[{"name":"Ainsworth BE et al. (2011) 2011 Compendium of Physical Activities: a second update of codes and MET values, Med Sci Sports Exerc 43:1575-1581","url":"https://pubmed.ncbi.nlm.nih.gov/21681120/","type":"peer_reviewed","retrieved_at":"2026-09-23"},{"name":"Compendium of Physical Activities – online MET tables (2011 and 2024 editions)","url":"https://pacompendium.com/","type":"reference","retrieved_at":"2026-09-23"}],"freshness":{"type":"static","max_age_seconds":null,"note":"Deterministic formula with fixed constants; results never go stale. Inputs supplied by the caller determine the output."},"examples":[{"name":"70 kg, running 6 mph, 30 min","inputs":{"weight_kg":70,"duration_minutes":30,"activity":"running_6_mph"},"expected":{"calories_kcal":360,"kcal_per_minute":12.01,"kcal_per_hour":720,"met":9.8},"url":"https://tttkmbb.com/api/v1/calculate/calories-burned?weight_kg=70&duration_minutes=30&activity=running_6_mph"},{"name":"65 kg, walking 3.5 mph, 60 min","inputs":{"weight_kg":65,"duration_minutes":60,"activity":"walking_3_5_mph"},"expected":{"calories_kcal":293,"kcal_per_minute":4.89,"met":4.3},"url":"https://tttkmbb.com/api/v1/calculate/calories-burned?weight_kg=65&duration_minutes=60&activity=walking_3_5_mph"}],"faq":[{"q":"Are these gross or net calories?","a":"Gross: they include the calories you would have burned resting during the same time (about 1 MET). Subtract weight_kg × duration_minutes / 60 for the net exercise cost."},{"q":"Why does the same run burn a different number on my watch?","a":"Devices add heart rate, speed and personal data; MET tables are averages for a standard 70 kg adult, so ±20 % differences are normal."}],"tags":["calories burned","met values","energy expenditure","exercise calories","running calories","walking calories"],"related":[{"calculator_id":"tdee","reason":"Daily calorie needs including all activity."},{"calculator_id":"bmr","reason":"Resting energy expenditure that the gross figure includes."},{"calculator_id":"steps-to-distance","reason":"Turn a step count into a walking distance first."}],"links":{"html":"https://tttkmbb.com/fitness/calories-burned","markdown":"https://tttkmbb.com/fitness/calories-burned.md","json":"https://tttkmbb.com/fitness/calories-burned.json","api":"https://tttkmbb.com/api/v1/calculate/calories-burned","schema":"https://tttkmbb.com/api/v1/calculators/calories-burned","openapi":"https://tttkmbb.com/openapi.json","mcp":"https://tttkmbb.com/mcp"},"version":"v1","updated_at":"2026-09-23"},"timestamp":"2026-09-23T23:32:33Z"}