{"uid":"cap_HbdVs9uwVzJtw1NIIQ0km","slug":"aviation-calculators-fuel-time-distance-e6b-50a0339e","name":"Aviation Calculators – Fuel, Time & Distance (E6B)","description":"E6B arithmetic: give any two of distance, groundspeed and time for the third, plus fuel burn, reserve and range.","url":"https://aviation-calc.x402tookit.com/fuel-time-distance?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":[],"properties":{"timeMin":{"type":"number","description":"Time in minutes"},"distanceNm":{"type":"number","description":"Distance in nautical miles"},"reserveMin":{"type":"number","description":"Reserve in minutes, 0 to 240 (default 45; US VFR rules are 30 minutes day, 45 night, and IFR needs 45 beyond the alternate)"},"fuelOnBoard":{"type":"number","description":"Usable fuel on board in the same unit, to check the reserve and range"},"groundspeedKt":{"type":"number","description":"Groundspeed in knots"},"fuelFlowPerHour":{"type":"number","description":"Fuel burn per hour in your unit (gallons, litres, pounds)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"source":{"type":["null","string"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"timeMin":{"type":["null","number"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"timeHhMm":{"type":["null","string"]},"tripFuel":{"type":["null","number"]},"disclaimer":{"type":["null","string"]},"distanceNm":{"type":["null","number"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"reserveMin":{"type":["null","number"]},"fuelOnBoard":{"type":["null","number"]},"reserveFuel":{"type":["null","number"]},"enduranceHhMm":{"type":["null","string"]},"groundspeedKt":{"type":["null","number"]},"enduranceHours":{"type":["null","number"]},"fuelFlowPerHour":{"type":["null","number"]},"rangeNmToReserve":{"type":["null","number"]},"maxRangeNmNoReserve":{"type":["null","number"]},"enduranceToReserveHhMm":{"type":["null","string"]},"fuelRemainingAtLanding":{"type":["null","number"]},"remainingMinutesAtLanding":{"type":["null","number"]}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_GLA-fXZDPiVWZaFIDpcJM","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Solves E6B flight computer arithmetic for any two of distance, groundspeed, and time, plus fuel burn, reserve fuel, and range calculations.","exampleAgentPrompt":"I'm planning a 185 nm leg at 125 knots groundspeed with a fuel flow of 8.5 gallons per hour and 40 gallons usable on board — can you work out my flight time, trip fuel, reserve fuel (use a 45-minute reserve), and how much range I have to reserve?","exampleUseCases":[{"title":"Pre-flight fuel check for VFR night flight","prompt":"I'm flying 220 nm tonight at 118 knots groundspeed, burning 9 gallons per hour, and I have 38 gallons usable. Apply a 45-minute night VFR reserve and tell me my trip fuel, reserve fuel, endurance, and whether I have enough to make it safely."},{"title":"Back-solve groundspeed from ATC time and distance","prompt":"ATC just told me I covered 95 nm in 52 minutes — can you calculate my groundspeed from that?"},{"title":"IFR range planning with 45-minute alternate reserve","prompt":"I need to know my range to reserve and max range with no reserve: I'm burning 11.2 gallons per hour at 140 knots, I have 60 gallons usable, and I need a 45-minute IFR reserve."}],"resultDescription":"Returns a JSON object with the computed unknowns filled in (timeMin, timeHhMm, distanceNm, groundspeedKt), plus tripFuel, reserveFuel, enduranceHours, enduranceHhMm, enduranceToReserveHhMm, rangeNmToReserve, maxRangeNmNoReserve, a human-readable summary, a verdict (e.g. pass/fail on fuel check), a list of reasons, and a disclaimer. Fields not computable from the inputs provided are returned as null.","failureModes":["Missing required combination of inputs — at least two of distance, groundspeed, or time must be provided for the triangle solve","Out-of-range reserveMin value (must be 0–240 minutes)","Negative or zero values for speed, distance, or fuel causing nonsensical results","Insufficient inputs to compute fuel outputs if fuelFlowPerHour or fuelOnBoard are omitted","HTTP 402 if the x402 payment header is missing or the USDC balance is insufficient"],"whenToPreferThis":"Use this endpoint when you need quick E6B-style arithmetic for a single flight leg — especially when checking fuel reserves, computing flight time, or back-solving groundspeed. It is purpose-built for aviation calculations with correct unit handling (knots, nautical miles, minutes) and built-in VFR/IFR reserve logic, making it preferable to a generic calculator for any pilot-facing agent or flight-planning workflow.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T13:12:41.047Z","isFirstParty":false,"canonicalSlug":"aviation-calculators-fuel-time-distance-e6b-50a0339e"}