{"success":true,"version":"v1","request":{"tool":"get_calculator_schema","calculator_id":"torque"},"result":{"entity_type":"calculator","id":"torque","calculator_id":"torque","canonical_url":"https://tttkmbb.com/conversion/torque","name":"Torque Converter","title":"Torque Converter – Newton-Metres, Pound-Feet, Pound-Inches, kgf·m and Ounce-Inches","category":"conversion","category_name":"Unit Conversion","tool_name":"convert_torque","featured_mcp_tool":false,"description":"Converts torque (moment of force) between N·m, kN·m, N·cm, mN·m, lbf·ft, lbf·in, kgf·m, kgf·cm and ozf·in using exact force and length definitions (1 lbf·ft = 1.3558179483 N·m).","use_when":"You need a wrench, bolt or engine torque in another unit, e.g. lb-ft to N·m, N·m to lb-in or kgf·m to N·m.","do_not_use_when":"You need energy in joules or foot-pounds of work (use energy; torque and energy share dimensions but are different quantities) or the force alone (use force).","inputs":[{"name":"value","label":"Value","type":"number","required":true,"description":"Amount to convert, expressed in from_unit.","example":100},{"name":"from_unit","label":"From unit","type":"enum","required":true,"values":[{"value":"Nm","label":"Newton metre (N·m)","aliases":["n·m","n-m","n m","n_m","newton metre","newton-metre","newtonmetre","newton·metre","newton_metre","newton meter","newton-meter","newtonmeter","newton·meter","newton_meter","newton metres","newton-metres","newtonmetres","newton·metres","newton_metres","newton meters","newton-meters","newtonmeters","newton·meters","newton_meters"]},{"value":"kNm","label":"Kilonewton metre (kN·m)","aliases":["kn·m","kn-m","kn m","kn_m","kilonewton metre","kilonewton-metre","kilonewtonmetre","kilonewton·metre","kilonewton_metre","kilonewton meter","kilonewton-meter","kilonewtonmeter","kilonewton·meter","kilonewton_meter","kilonewton metres","kilonewton-metres","kilonewtonmetres","kilonewton·metres","kilonewton_metres","kilonewton meters","kilonewton-meters","kilonewtonmeters","kilonewton·meters","kilonewton_meters"]},{"value":"Ncm","label":"Newton centimetre (N·cm)","aliases":["n·cm","n-cm","n cm","n_cm","newton centimetre","newton-centimetre","newtoncentimetre","newton·centimetre","newton_centimetre","newton centimeter","newton-centimeter","newtoncentimeter","newton·centimeter","newton_centimeter","newton centimetres","newton-centimetres","newtoncentimetres","newton·centimetres","newton_centimetres","newton centimeters","newton-centimeters","newtoncentimeters","newton·centimeters","newton_centimeters"]},{"value":"mNm","label":"Millinewton metre (mN·m)","aliases":["mn·m","mn-m","mn m","mn_m","millinewton metre","millinewton-metre","millinewtonmetre","millinewton·metre","millinewton_metre","millinewton meter","millinewton-meter","millinewtonmeter","millinewton·meter","millinewton_meter","millinewton metres","millinewton-metres","millinewtonmetres","millinewton·metres","millinewton_metres","millinewton meters","millinewton-meters","millinewtonmeters","millinewton·meters","millinewton_meters"]},{"value":"lbf_ft","label":"Pound-foot (lbf·ft)","aliases":["lbf-ft","lbf ft","lbfft","lbf·ft","pound-foot","pound foot","poundfoot","pound·foot","pound_foot","pound-feet","pound feet","poundfeet","pound·feet","pound_feet","foot-pound","foot pound","footpound","foot·pound","foot_pound","foot-pounds","foot pounds","footpounds","foot·pounds","foot_pounds","ft·lbf","ft-lbf","ft lbf","ftlbf","ft_lbf","lb-ft","lb ft","lbft","lb·ft","lb_ft","ft-lb","ft lb","ftlb","ft·lb","ft_lb"]},{"value":"lbf_in","label":"Pound-inch (lbf·in)","aliases":["lbf-in","lbf in","lbfin","lbf·in","pound-inch","pound inch","poundinch","pound·inch","pound_inch","pound-inches","pound inches","poundinches","pound·inches","pound_inches","inch-pound","inch pound","inchpound","inch·pound","inch_pound","inch-pounds","inch pounds","inchpounds","inch·pounds","inch_pounds","in·lbf","in-lbf","in lbf","inlbf","in_lbf","lb-in","lb in","lbin","lb·in","lb_in","in-lb","in lb","inlb","in·lb","in_lb"]},{"value":"kgf_m","label":"Kilogram-force metre (kgf·m)","aliases":["kgf-m","kgf m","kgfm","kgf·m","kilogram-force metre","kilogram-force-metre","kilogram force metre","kilogramforcemetre","kilogram·force·metre","kilogram_force_metre","kilogram-force meter","kilogram-force-meter","kilogram force meter","kilogramforcemeter","kilogram·force·meter","kilogram_force_meter","kgm"]},{"value":"kgf_cm","label":"Kilogram-force centimetre (kgf·cm)","aliases":["kgf-cm","kgf cm","kgfcm","kgf·cm","kilogram-force centimetre","kilogram-force-centimetre","kilogram force centimetre","kilogramforcecentimetre","kilogram·force·centimetre","kilogram_force_centimetre","kilogram-force centimeter","kilogram-force-centimeter","kilogram force centimeter","kilogramforcecentimeter","kilogram·force·centimeter","kilogram_force_centimeter","kgcm"]},{"value":"ozf_in","label":"Ounce-inch (ozf·in)","aliases":["ozf-in","ozf in","ozfin","ozf·in","ounce-inch","ounce inch","ounceinch","ounce·inch","ounce_inch","ounce-inches","ounce inches","ounceinches","ounce·inches","ounce_inches","inch-ounce","inch ounce","inchounce","inch·ounce","inch_ounce","in·ozf","in-ozf","in ozf","inozf","in_ozf","oz-in","oz in","ozin","oz·in","oz_in","in-oz","in oz","inoz","in·oz","in_oz"]}],"description":"Unit of the input value. Accepted symbols: Nm, kNm, Ncm, mNm, lbf_ft, lbf_in, kgf_m, kgf_cm, ozf_in; spelled-out names and common abbreviations are accepted too.","example":"lbf_ft"},{"name":"to_unit","label":"To unit","type":"enum","required":true,"values":[{"value":"Nm","label":"Newton metre (N·m)","aliases":["n·m","n-m","n m","n_m","newton metre","newton-metre","newtonmetre","newton·metre","newton_metre","newton meter","newton-meter","newtonmeter","newton·meter","newton_meter","newton metres","newton-metres","newtonmetres","newton·metres","newton_metres","newton meters","newton-meters","newtonmeters","newton·meters","newton_meters"]},{"value":"kNm","label":"Kilonewton metre (kN·m)","aliases":["kn·m","kn-m","kn m","kn_m","kilonewton metre","kilonewton-metre","kilonewtonmetre","kilonewton·metre","kilonewton_metre","kilonewton meter","kilonewton-meter","kilonewtonmeter","kilonewton·meter","kilonewton_meter","kilonewton metres","kilonewton-metres","kilonewtonmetres","kilonewton·metres","kilonewton_metres","kilonewton meters","kilonewton-meters","kilonewtonmeters","kilonewton·meters","kilonewton_meters"]},{"value":"Ncm","label":"Newton centimetre (N·cm)","aliases":["n·cm","n-cm","n cm","n_cm","newton centimetre","newton-centimetre","newtoncentimetre","newton·centimetre","newton_centimetre","newton centimeter","newton-centimeter","newtoncentimeter","newton·centimeter","newton_centimeter","newton centimetres","newton-centimetres","newtoncentimetres","newton·centimetres","newton_centimetres","newton centimeters","newton-centimeters","newtoncentimeters","newton·centimeters","newton_centimeters"]},{"value":"mNm","label":"Millinewton metre (mN·m)","aliases":["mn·m","mn-m","mn m","mn_m","millinewton metre","millinewton-metre","millinewtonmetre","millinewton·metre","millinewton_metre","millinewton meter","millinewton-meter","millinewtonmeter","millinewton·meter","millinewton_meter","millinewton metres","millinewton-metres","millinewtonmetres","millinewton·metres","millinewton_metres","millinewton meters","millinewton-meters","millinewtonmeters","millinewton·meters","millinewton_meters"]},{"value":"lbf_ft","label":"Pound-foot (lbf·ft)","aliases":["lbf-ft","lbf ft","lbfft","lbf·ft","pound-foot","pound foot","poundfoot","pound·foot","pound_foot","pound-feet","pound feet","poundfeet","pound·feet","pound_feet","foot-pound","foot pound","footpound","foot·pound","foot_pound","foot-pounds","foot pounds","footpounds","foot·pounds","foot_pounds","ft·lbf","ft-lbf","ft lbf","ftlbf","ft_lbf","lb-ft","lb ft","lbft","lb·ft","lb_ft","ft-lb","ft lb","ftlb","ft·lb","ft_lb"]},{"value":"lbf_in","label":"Pound-inch (lbf·in)","aliases":["lbf-in","lbf in","lbfin","lbf·in","pound-inch","pound inch","poundinch","pound·inch","pound_inch","pound-inches","pound inches","poundinches","pound·inches","pound_inches","inch-pound","inch pound","inchpound","inch·pound","inch_pound","inch-pounds","inch pounds","inchpounds","inch·pounds","inch_pounds","in·lbf","in-lbf","in lbf","inlbf","in_lbf","lb-in","lb in","lbin","lb·in","lb_in","in-lb","in lb","inlb","in·lb","in_lb"]},{"value":"kgf_m","label":"Kilogram-force metre (kgf·m)","aliases":["kgf-m","kgf m","kgfm","kgf·m","kilogram-force metre","kilogram-force-metre","kilogram force metre","kilogramforcemetre","kilogram·force·metre","kilogram_force_metre","kilogram-force meter","kilogram-force-meter","kilogram force meter","kilogramforcemeter","kilogram·force·meter","kilogram_force_meter","kgm"]},{"value":"kgf_cm","label":"Kilogram-force centimetre (kgf·cm)","aliases":["kgf-cm","kgf cm","kgfcm","kgf·cm","kilogram-force centimetre","kilogram-force-centimetre","kilogram force centimetre","kilogramforcecentimetre","kilogram·force·centimetre","kilogram_force_centimetre","kilogram-force centimeter","kilogram-force-centimeter","kilogram force centimeter","kilogramforcecentimeter","kilogram·force·centimeter","kilogram_force_centimeter","kgcm"]},{"value":"ozf_in","label":"Ounce-inch (ozf·in)","aliases":["ozf-in","ozf in","ozfin","ozf·in","ounce-inch","ounce inch","ounceinch","ounce·inch","ounce_inch","ounce-inches","ounce inches","ounceinches","ounce·inches","ounce_inches","inch-ounce","inch ounce","inchounce","inch·ounce","inch_ounce","in·ozf","in-ozf","in ozf","inozf","in_ozf","oz-in","oz in","ozin","oz·in","oz_in","in-oz","in oz","inoz","in·oz","in_oz"]}],"description":"Unit to convert into (same symbols as from_unit).","example":"Nm"}],"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 torque 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":[100]},"from_unit":{"description":"Unit of the input value. Accepted symbols: Nm, kNm, Ncm, mNm, lbf_ft, lbf_in, kgf_m, kgf_cm, ozf_in; spelled-out names and common abbreviations are accepted too.","type":"string","enum":["Nm","kNm","Ncm","mNm","lbf_ft","lbf_in","kgf_m","kgf_cm","ozf_in"],"examples":["lbf_ft"]},"to_unit":{"description":"Unit to convert into (same symbols as from_unit).","type":"string","enum":["Nm","kNm","Ncm","mNm","lbf_ft","lbf_in","kgf_m","kgf_cm","ozf_in"],"examples":["Nm"]}},"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 torque unit (6 significant figures), keyed by unit symbol.","type":"object"}}},"formula":"result = value × factor, factor = (1 from_unit in Nm) / (1 to_unit in Nm)","method":"Torque = force × lever arm, so the factors are products of the force factors (lbf, kgf, ozf) and length factors (ft, in, m, cm).","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":"100 lb-ft to newton-metres","inputs":{"value":100,"from_unit":"lbf_ft","to_unit":"Nm"},"expected":{"result":135.581795,"factor":1.3558179483,"formula":"1 lbf·ft = 1.355817948 N·m","conversion_table":{"kgf_m":13.8255,"lbf_in":1200}},"url":"https://tttkmbb.com/api/v1/calculate/torque?value=100&from_unit=lbf_ft&to_unit=Nm"},{"name":"250 N·m to lb-ft","inputs":{"value":250,"from_unit":"Nm","to_unit":"lbf_ft"},"expected":{"result":184.390861,"conversion_table":{"kgf_m":25.4929,"lbf_in":2212.69}},"url":"https://tttkmbb.com/api/v1/calculate/torque?value=250&from_unit=Nm&to_unit=lbf_ft"}],"faq":[{"q":"Is lb-ft the same as ft-lb?","a":"Both spellings denote the same torque unit (1 lbf·ft = 1.35582 N·m) and are accepted here. Foot-pound is also used for energy (ft·lbf in the energy converter); the numeric factor to joules is identical."},{"q":"How do I enter N·m?","a":"Use Nm (or N·m, N-m, newton metre); kgf·m is kgf_m and inch-pounds are lbf_in."}],"tags":["torque converter","lb-ft to nm","nm to lb-ft","in-lb to nm","kgf m","ounce inch"],"related":[{"calculator_id":"force","reason":"Force units behind each torque unit."},{"calculator_id":"energy","reason":"Same dimensions (N·m = J) but a different quantity."},{"calculator_id":"work-power","reason":"Work and power from force and motion."}],"links":{"html":"https://tttkmbb.com/conversion/torque","markdown":"https://tttkmbb.com/conversion/torque.md","json":"https://tttkmbb.com/conversion/torque.json","api":"https://tttkmbb.com/api/v1/calculate/torque","schema":"https://tttkmbb.com/api/v1/calculators/torque","openapi":"https://tttkmbb.com/openapi.json","mcp":"https://tttkmbb.com/mcp"},"version":"v1","updated_at":"2026-09-23"},"timestamp":"2026-09-23T23:23:04Z"}