{"success":true,"version":"v1","request":{"tool":"get_calculator_schema","calculator_id":"pace-converter"},"result":{"entity_type":"calculator","id":"pace-converter","calculator_id":"pace-converter","canonical_url":"https://tttkmbb.com/fitness/pace-converter","name":"Pace Converter","title":"Pace Converter – min/km, min/mile, km/h and mph from Any One Value","category":"fitness","category_name":"Sports & Fitness","tool_name":"convert_running_pace","featured_mcp_tool":false,"description":"Converts a running pace or speed given in any one of min/km, min/mile, km/h or mph into all four units, plus seconds per km/mile and metres per second.","use_when":"You need to translate a treadmill speed into a pace, a min/mile pace into min/km, or any other pace/speed unit conversion.","do_not_use_when":"You have a distance and time rather than a pace (use running-pace) or a swim time (use swim-pace).","inputs":[{"name":"pace_min_per_km","label":"Pace per km","type":"string","required":false,"description":"Pace as mm:ss per kilometre (e.g. 5:00) or decimal minutes (5.5). Give exactly one of the four inputs; if several are given, this one takes precedence.","example":"5:00"},{"name":"pace_min_per_mile","label":"Pace per mile","type":"string","required":false,"description":"Pace as mm:ss per mile (e.g. 8:03) or decimal minutes.","example":"8:03"},{"name":"speed_kmh","label":"Speed","type":"number","unit":"km/h","required":false,"max":100,"exclusive_min":0,"description":"Speed in kilometres per hour (e.g. treadmill display).","example":12},{"name":"speed_mph","label":"Speed","type":"number","unit":"mph","required":false,"max":60,"exclusive_min":0,"description":"Speed in miles per hour.","example":7.46}],"outputs":[{"name":"pace_min_per_km","label":"Pace per km","type":"string","unit":"min:sec/km","decimals":4,"description":"Minutes and seconds per kilometre."},{"name":"pace_min_per_mile","label":"Pace per mile","type":"string","unit":"min:sec/mi","decimals":4,"description":"Minutes and seconds per mile."},{"name":"speed_kmh","label":"Speed","type":"number","unit":"km/h","decimals":2,"description":"Kilometres per hour."},{"name":"speed_mph","label":"Speed","type":"number","unit":"mph","decimals":2,"description":"Miles per hour."},{"name":"pace_seconds_per_km","label":"Seconds per km","type":"number","unit":"s/km","decimals":1,"description":"Pace as seconds per kilometre."},{"name":"pace_seconds_per_mile","label":"Seconds per mile","type":"number","unit":"s/mi","decimals":1,"description":"Pace as seconds per mile."},{"name":"speed_m_per_s","label":"Speed","type":"number","unit":"m/s","decimals":3,"description":"Metres per second."},{"name":"source_input","label":"Converted from","type":"string","decimals":4,"description":"Which input was used as the source value."}],"input_schema":{"type":"object","properties":{"pace_min_per_km":{"description":"Pace as mm:ss per kilometre (e.g. 5:00) or decimal minutes (5.5). Give exactly one of the four inputs; if several are given, this one takes precedence.","type":"string","examples":["5:00"]},"pace_min_per_mile":{"description":"Pace as mm:ss per mile (e.g. 8:03) or decimal minutes.","type":"string","examples":["8:03"]},"speed_kmh":{"description":"Speed in kilometres per hour (e.g. treadmill display). Unit: km/h.","type":"number","maximum":100,"exclusiveMinimum":0,"examples":[12],"x-unit":"km/h"},"speed_mph":{"description":"Speed in miles per hour. Unit: mph.","type":"number","maximum":60,"exclusiveMinimum":0,"examples":[7.46],"x-unit":"mph"}},"additionalProperties":false},"output_schema":{"type":"object","properties":{"pace_min_per_km":{"description":"Minutes and seconds per kilometre. Unit: min:sec/km.","type":"string","x-unit":"min:sec/km"},"pace_min_per_mile":{"description":"Minutes and seconds per mile. Unit: min:sec/mi.","type":"string","x-unit":"min:sec/mi"},"speed_kmh":{"description":"Kilometres per hour. Unit: km/h.","type":"number","x-unit":"km/h"},"speed_mph":{"description":"Miles per hour. Unit: mph.","type":"number","x-unit":"mph"},"pace_seconds_per_km":{"description":"Pace as seconds per kilometre. Unit: s/km.","type":"number","x-unit":"s/km"},"pace_seconds_per_mile":{"description":"Pace as seconds per mile. Unit: s/mi.","type":"number","x-unit":"s/mi"},"speed_m_per_s":{"description":"Metres per second. Unit: m/s.","type":"number","x-unit":"m/s"},"source_input":{"description":"Which input was used as the source value.","type":"string"}}},"formula":"pace_s_per_km = 3600 / speed_kmh; pace_s_per_mile = pace_s_per_km × 1.609344; speed_mph = speed_kmh / 1.609344; speed_m_per_s = speed_kmh / 3.6 (1 mile = 1609.344 m)","sources":[{"name":"NIST Special Publication 811 – Guide for the Use of the SI (Appendix B: 1 mile = 1609.344 m, 1 yard = 0.9144 m)","url":"https://www.nist.gov/pml/special-publication-811","type":"standard","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":"5:00 min/km","inputs":{"pace_min_per_km":"5:00"},"expected":{"pace_min_per_mile":"8:03","speed_kmh":12,"speed_mph":7.46,"pace_seconds_per_km":300,"pace_seconds_per_mile":482.8,"speed_m_per_s":3.333,"source_input":"pace_min_per_km"},"url":"https://tttkmbb.com/api/v1/calculate/pace-converter?pace_min_per_km=5%3A00"},{"name":"6 mph treadmill","inputs":{"speed_mph":6},"expected":{"speed_kmh":9.66,"pace_min_per_mile":"10:00","pace_min_per_km":"6:13","pace_seconds_per_km":372.8},"url":"https://tttkmbb.com/api/v1/calculate/pace-converter?speed_mph=6"}],"faq":[{"q":"What if I give more than one input?","a":"The first available in the order pace_min_per_km, pace_min_per_mile, speed_kmh, speed_mph is used and the rest are ignored; a note says which one."},{"q":"How do I enter a pace like 7 minutes 30 seconds?","a":"As 7:30 or as decimal minutes 7.5; both give the same result."}],"tags":["pace converter","min per km to min per mile","km/h to pace","treadmill speed to pace","mph to min per mile"],"related":[{"calculator_id":"running-pace","reason":"Pace from a distance and time, with race splits."},{"calculator_id":"swim-pace","reason":"Pace per 100 m for swimming."},{"calculator_id":"speed","reason":"General speed unit conversions."}],"links":{"html":"https://tttkmbb.com/fitness/pace-converter","markdown":"https://tttkmbb.com/fitness/pace-converter.md","json":"https://tttkmbb.com/fitness/pace-converter.json","api":"https://tttkmbb.com/api/v1/calculate/pace-converter","schema":"https://tttkmbb.com/api/v1/calculators/pace-converter","openapi":"https://tttkmbb.com/openapi.json","mcp":"https://tttkmbb.com/mcp"},"version":"v1","updated_at":"2026-09-23"},"timestamp":"2026-09-23T23:31:37Z"}