{"uid":"cap_tAQ0iXoZGIPsBHwEsMZKF","slug":"sindri-unit-converter-length-mass-volume-temperature-ecc3981e","name":"Sindri Unit Converter (Length, Mass, Volume, Temperature)","description":"Unit conversion for length, mass, volume, and temperature using exact conversion factors (temperature uses the correct affine formulas, not simple multiplication).","url":"https://x402.outpimp.com/unitConvert","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"to":{"type":"string","description":"Target unit."},"from":{"type":"string","description":"Source unit, e.g. \"m\", \"kg\", \"gal\", \"C\"."},"value":{"type":"number","description":"The numeric value to convert."},"category":{"enum":["length","mass","volume","temperature"],"type":"string","description":"Unit category."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_X3rPNKkWFYkCjwpZ5RhoG","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Converts numeric values between units of length, mass, volume, and temperature using exact conversion factors and correct affine formulas for temperature.","exampleAgentPrompt":"Convert 72 degrees Fahrenheit to Celsius — it's a temperature conversion.","exampleUseCases":[{"title":"Recipe unit conversion for cooking","prompt":"I need to convert 2.5 cups to milliliters for this recipe — it's a volume conversion."},{"title":"International shipping weight conversion","prompt":"Convert 15 pounds to kilograms for a mass conversion — I need it for a shipping label."},{"title":"Body temperature Celsius to Fahrenheit","prompt":"Convert 38.5 degrees Celsius to Fahrenheit — that's a temperature conversion so make sure you use the right formula, not just multiplication."}],"resultDescription":"Returns the converted numeric value in the target unit, computed using exact conversion factors. Temperature conversions use proper affine formulas (e.g., °C to °F = multiply by 9/5 then add 32) rather than simple multiplication.","failureModes":["Unsupported unit string returns an error indicating the unit is not recognized","Mismatched category and units (e.g., passing 'kg' as a length unit) returns a validation error","Missing required fields (value, from, to, category) return a 400-level error","Invalid category enum value returns a schema validation error"],"whenToPreferThis":"Choose this endpoint when you need accurate unit conversion for common physical quantities — especially temperature, where naive multiplication gives wrong results. Prefer it over generic calculators when you need exact conversion factors for length (meters/feet/miles/inches/cm), mass (kg/lb/g/oz), volume (liters/gallons/ml/cups/fl oz), or temperature (Celsius/Fahrenheit/Kelvin). It complements the sibling scientific unit converter (pressure, energy, molarity) on the same host.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:40:34.280Z","isFirstParty":false}