{"success":true,"version":"v1","request":{"tool":"get_calculator_schema","calculator_id":"area"},"result":{"entity_type":"calculator","id":"area","calculator_id":"area","canonical_url":"https://tttkmbb.com/conversion/area","name":"Area Converter","title":"Area Converter – Square Metres, Square Feet, Acres, Hectares and Square Miles","category":"conversion","category_name":"Unit Conversion","tool_name":"convert_area","featured_mcp_tool":false,"description":"Converts areas between metric (mm² to km², hectare) and US/imperial units (in², ft², yd², acre, mi²) using exact factors (1 ft² = 0.09290304 m², 1 acre = 4046.8564224 m²).","use_when":"You need land, floor or surface area in another unit, e.g. square feet to square metres, acres to hectares or square miles to square kilometres.","do_not_use_when":"You need to compute an area from dimensions (use rectangle, circle or triangle-area) or material quantities for a floor (use flooring).","inputs":[{"name":"value","label":"Value","type":"number","required":true,"description":"Amount to convert, expressed in from_unit.","example":1},{"name":"from_unit","label":"From unit","type":"enum","required":true,"values":[{"value":"mm2","label":"Square millimetre (mm²)","aliases":["mm^2","mm²","square millimetre","square-millimetre","squaremillimetre","square·millimetre","square_millimetre","square millimeter","square-millimeter","squaremillimeter","square·millimeter","square_millimeter","square millimetres","square-millimetres","squaremillimetres","square·millimetres","square_millimetres","square millimeters","square-millimeters","squaremillimeters","square·millimeters","square_millimeters","sq mm","sq-mm","sqmm","sq·mm","sq_mm"]},{"value":"cm2","label":"Square centimetre (cm²)","aliases":["cm^2","cm²","square centimetre","square-centimetre","squarecentimetre","square·centimetre","square_centimetre","square centimeter","square-centimeter","squarecentimeter","square·centimeter","square_centimeter","square centimetres","square-centimetres","squarecentimetres","square·centimetres","square_centimetres","square centimeters","square-centimeters","squarecentimeters","square·centimeters","square_centimeters","sq cm","sq-cm","sqcm","sq·cm","sq_cm"]},{"value":"m2","label":"Square metre (m²)","aliases":["m^2","m²","square metre","square-metre","squaremetre","square·metre","square_metre","square meter","square-meter","squaremeter","square·meter","square_meter","square metres","square-metres","squaremetres","square·metres","square_metres","square meters","square-meters","squaremeters","square·meters","square_meters","metres squared","metres-squared","metressquared","metres·squared","metres_squared","meters squared","meters-squared","meterssquared","meters·squared","meters_squared","sq m","sq-m","sqm","sq·m","sq_m"]},{"value":"ha","label":"Hectare (ha)","aliases":["hectare","hectares"]},{"value":"km2","label":"Square kilometre (km²)","aliases":["km^2","km²","square kilometre","square-kilometre","squarekilometre","square·kilometre","square_kilometre","square kilometer","square-kilometer","squarekilometer","square·kilometer","square_kilometer","square kilometres","square-kilometres","squarekilometres","square·kilometres","square_kilometres","square kilometers","square-kilometers","squarekilometers","square·kilometers","square_kilometers","sq km","sq-km","sqkm","sq·km","sq_km"]},{"value":"in2","label":"Square inch (in²)","aliases":["in^2","in²","square inch","square-inch","squareinch","square·inch","square_inch","square inches","square-inches","squareinches","square·inches","square_inches","sq in","sq-in","sqin","sq·in","sq_in"]},{"value":"ft2","label":"Square foot (ft²)","aliases":["ft^2","ft²","square foot","square-foot","squarefoot","square·foot","square_foot","square feet","square-feet","squarefeet","square·feet","square_feet","sq ft","sq-ft","sqft","sq·ft","sq_ft"]},{"value":"yd2","label":"Square yard (yd²)","aliases":["yd^2","yd²","square yard","square-yard","squareyard","square·yard","square_yard","square yards","square-yards","squareyards","square·yards","square_yards","sq yd","sq-yd","sqyd","sq·yd","sq_yd"]},{"value":"acre","label":"Acre (acre)","aliases":["acres","ac"]},{"value":"mi2","label":"Square mile (mi²)","aliases":["mi^2","mi²","square mile","square-mile","squaremile","square·mile","square_mile","square miles","square-miles","squaremiles","square·miles","square_miles","sq mi","sq-mi","sqmi","sq·mi","sq_mi"]}],"description":"Unit of the input value. Accepted symbols: mm2, cm2, m2, ha, km2, in2, ft2, yd2, acre, mi2; spelled-out names and common abbreviations are accepted too.","example":"acre"},{"name":"to_unit","label":"To unit","type":"enum","required":true,"values":[{"value":"mm2","label":"Square millimetre (mm²)","aliases":["mm^2","mm²","square millimetre","square-millimetre","squaremillimetre","square·millimetre","square_millimetre","square millimeter","square-millimeter","squaremillimeter","square·millimeter","square_millimeter","square millimetres","square-millimetres","squaremillimetres","square·millimetres","square_millimetres","square millimeters","square-millimeters","squaremillimeters","square·millimeters","square_millimeters","sq mm","sq-mm","sqmm","sq·mm","sq_mm"]},{"value":"cm2","label":"Square centimetre (cm²)","aliases":["cm^2","cm²","square centimetre","square-centimetre","squarecentimetre","square·centimetre","square_centimetre","square centimeter","square-centimeter","squarecentimeter","square·centimeter","square_centimeter","square centimetres","square-centimetres","squarecentimetres","square·centimetres","square_centimetres","square centimeters","square-centimeters","squarecentimeters","square·centimeters","square_centimeters","sq cm","sq-cm","sqcm","sq·cm","sq_cm"]},{"value":"m2","label":"Square metre (m²)","aliases":["m^2","m²","square metre","square-metre","squaremetre","square·metre","square_metre","square meter","square-meter","squaremeter","square·meter","square_meter","square metres","square-metres","squaremetres","square·metres","square_metres","square meters","square-meters","squaremeters","square·meters","square_meters","metres squared","metres-squared","metressquared","metres·squared","metres_squared","meters squared","meters-squared","meterssquared","meters·squared","meters_squared","sq m","sq-m","sqm","sq·m","sq_m"]},{"value":"ha","label":"Hectare (ha)","aliases":["hectare","hectares"]},{"value":"km2","label":"Square kilometre (km²)","aliases":["km^2","km²","square kilometre","square-kilometre","squarekilometre","square·kilometre","square_kilometre","square kilometer","square-kilometer","squarekilometer","square·kilometer","square_kilometer","square kilometres","square-kilometres","squarekilometres","square·kilometres","square_kilometres","square kilometers","square-kilometers","squarekilometers","square·kilometers","square_kilometers","sq km","sq-km","sqkm","sq·km","sq_km"]},{"value":"in2","label":"Square inch (in²)","aliases":["in^2","in²","square inch","square-inch","squareinch","square·inch","square_inch","square inches","square-inches","squareinches","square·inches","square_inches","sq in","sq-in","sqin","sq·in","sq_in"]},{"value":"ft2","label":"Square foot (ft²)","aliases":["ft^2","ft²","square foot","square-foot","squarefoot","square·foot","square_foot","square feet","square-feet","squarefeet","square·feet","square_feet","sq ft","sq-ft","sqft","sq·ft","sq_ft"]},{"value":"yd2","label":"Square yard (yd²)","aliases":["yd^2","yd²","square yard","square-yard","squareyard","square·yard","square_yard","square yards","square-yards","squareyards","square·yards","square_yards","sq yd","sq-yd","sqyd","sq·yd","sq_yd"]},{"value":"acre","label":"Acre (acre)","aliases":["acres","ac"]},{"value":"mi2","label":"Square mile (mi²)","aliases":["mi^2","mi²","square mile","square-mile","squaremile","square·mile","square_mile","square miles","square-miles","squaremiles","square·miles","square_miles","sq mi","sq-mi","sqmi","sq·mi","sq_mi"]}],"description":"Unit to convert into (same symbols as from_unit).","example":"ft2"}],"outputs":[{"name":"result","label":"Result","type":"number","decimals":6,"description":"Converted value expressed in to_unit (rounded to 6 decimals; see result_text for very small or very large values)."},{"name":"result_text","label":"Conversion","type":"string","decimals":4,"description":"The conversion as text with 6 significant figures, e.g. \"5 mi = 8.04672 km\"."},{"name":"formula","label":"Unit relation","type":"string","decimals":4,"description":"Relation used, e.g. \"1 mi = 1.609344 km\"."},{"name":"factor","label":"Factor","type":"number","decimals":12,"description":"Multiplier from from_unit to to_unit (result = value × factor); absent for non-linear conversions."},{"name":"conversion_table","label":"Conversion table","type":"object","decimals":12,"description":"The input value expressed in every supported area unit (6 significant figures), keyed by unit symbol."}],"input_schema":{"type":"object","properties":{"value":{"description":"Amount to convert, expressed in from_unit.","type":"number","examples":[1]},"from_unit":{"description":"Unit of the input value. Accepted symbols: mm2, cm2, m2, ha, km2, in2, ft2, yd2, acre, mi2; spelled-out names and common abbreviations are accepted too.","type":"string","enum":["mm2","cm2","m2","ha","km2","in2","ft2","yd2","acre","mi2"],"examples":["acre"]},"to_unit":{"description":"Unit to convert into (same symbols as from_unit).","type":"string","enum":["mm2","cm2","m2","ha","km2","in2","ft2","yd2","acre","mi2"],"examples":["ft2"]}},"additionalProperties":false,"required":["value","from_unit","to_unit"]},"output_schema":{"type":"object","properties":{"result":{"description":"Converted value expressed in to_unit (rounded to 6 decimals; see result_text for very small or very large values).","type":"number"},"result_text":{"description":"The conversion as text with 6 significant figures, e.g. \"5 mi = 8.04672 km\".","type":"string"},"formula":{"description":"Relation used, e.g. \"1 mi = 1.609344 km\".","type":"string"},"factor":{"description":"Multiplier from from_unit to to_unit (result = value × factor); absent for non-linear conversions.","type":"number"},"conversion_table":{"description":"The input value expressed in every supported area unit (6 significant figures), keyed by unit symbol.","type":"object"}}},"formula":"result = value × factor, factor = (1 from_unit in m2) / (1 to_unit in m2)","sources":[{"name":"NIST Special Publication 811 – Guide for the Use of the International System of Units (SI), Appendix B conversion factors","url":"https://www.nist.gov/pml/special-publication-811","type":"standard","retrieved_at":"2026-09-23"},{"name":"BIPM – The International System of Units (SI Brochure, 9th edition)","url":"https://www.bipm.org/en/publications/si-brochure","type":"standard","retrieved_at":"2026-09-23"},{"name":"Wikipedia – Conversion of units","url":"https://en.wikipedia.org/wiki/Conversion_of_units","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":"1 acre to square feet","inputs":{"value":1,"from_unit":"acre","to_unit":"ft2"},"expected":{"result":43560,"factor":43560,"formula":"1 acre = 43560 ft²","conversion_table":{"m2":4046.86,"ha":0.404686}},"url":"https://tttkmbb.com/api/v1/calculate/area?value=1&from_unit=acre&to_unit=ft2"},{"name":"120 m² to square feet","inputs":{"value":120,"from_unit":"m2","to_unit":"ft2"},"expected":{"result":1291.66925,"conversion_table":{"yd2":143.519,"acre":0.0296526}},"url":"https://tttkmbb.com/api/v1/calculate/area?value=120&from_unit=m2&to_unit=ft2"}],"faq":[{"q":"How do I enter square units?","a":"Use m2, ft2, km2 (or m², sq ft, square feet, sqm and similar spellings); the enum values are the ASCII forms."},{"q":"Is the acre exact?","a":"Yes: the international acre is 4046.8564224 m² (66 × 660 international feet). The US survey acre differs by about 4 parts per million and is not used here."}],"tags":["area converter","square feet to square meters","acres to hectares","square miles to km2","land area"],"related":[{"calculator_id":"rectangle","reason":"Compute area from side lengths first."},{"calculator_id":"flooring","reason":"Estimate flooring from a floor area."},{"calculator_id":"length","reason":"Convert the underlying lengths."}],"links":{"html":"https://tttkmbb.com/conversion/area","markdown":"https://tttkmbb.com/conversion/area.md","json":"https://tttkmbb.com/conversion/area.json","api":"https://tttkmbb.com/api/v1/calculate/area","schema":"https://tttkmbb.com/api/v1/calculators/area","openapi":"https://tttkmbb.com/openapi.json","mcp":"https://tttkmbb.com/mcp"},"version":"v1","updated_at":"2026-09-23"},"timestamp":"2026-09-23T23:24:43Z","next_actions":[{"tool":"run_calculator","calculator_id":"area","reason":"Run Area Converter with the inputs above."}],"links":{"markdown":"https://tttkmbb.com/conversion/area.md"}}