{"uid":"cap_oU-HiwuTVhQm3HdQcG6NX","slug":"paint-coverage-calculator-faa02950","name":"Paint Coverage Calculator","description":"Gallons of paint for a room from its size, doors, windows and coats; optional ceiling. Rounds up to the quart.","url":"https://construction-calc.x402tookit.com/paint-coverage?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":["lengthFt","widthFt","heightFt"],"properties":{"coats":{"type":"integer","description":"Coats, default 2"},"doors":{"type":"integer","description":"Doors to subtract, default 0"},"widthFt":{"type":"number","description":"Room width in feet"},"windows":{"type":"integer","description":"Windows to subtract, default 0"},"heightFt":{"type":"number","description":"Ceiling height in feet"},"lengthFt":{"type":"number","description":"Room length in feet"},"includeCeiling":{"type":"string","description":"yes to include the ceiling, default no"},"coverageSqFtPerGallon":{"type":"number","description":"Label coverage, default 350"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"coats":{"type":["null","number"]},"source":{"type":["null","string"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"buyGallons":{"type":["null","number"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"ceilingSqFt":{"type":["null","number"]},"extraQuarts":{"type":["null","number"]},"paintableM2":{"type":["null","number"]},"exactGallons":{"type":["null","number"]},"openingsSqFt":{"type":["null","number"]},"wallAreaSqFt":{"type":["null","number"]},"wholeGallons":{"type":["null","number"]},"paintableSqFt":{"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_qcrEVuYgogkjdAkNz3yb8","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":"Calculates gallons of paint needed for a room based on dimensions, doors, windows, number of coats, and optional ceiling, rounded up to the nearest quart.","exampleAgentPrompt":"How much paint do I need for a 14 by 12 foot bedroom with 9-foot ceilings, 2 doors and 2 windows, applying 2 coats — include the ceiling too and use standard 350 sq ft per gallon coverage?","exampleUseCases":[{"title":"Bedroom repaint estimate","prompt":"I'm repainting my 12x10 bedroom with 8-foot ceilings. There's 1 door and 1 window, I want 2 coats, and I don't need to paint the ceiling. How many gallons of paint should I buy?"},{"title":"Full room paint with ceiling","prompt":"Can you figure out how much paint I need for my living room — it's 18 feet long, 14 feet wide, 9-foot ceilings, 3 windows, 2 doors, 2 coats, and yes include the ceiling in the calculation?"},{"title":"Custom coverage label painting job","prompt":"I'm using a premium paint that covers 400 square feet per gallon. The room is 16 by 13 feet with 10-foot ceilings, 2 doors and 3 windows, 1 coat only. How many gallons do I need rounded up to the quart?"}],"resultDescription":"Returns a breakdown including total wall area in sq ft, ceiling area, openings area subtracted for doors/windows, paintable sq ft (and m²), exact gallons needed, whole gallons, extra quarts, the recommended buy quantity rounded up to the nearest quart, number of coats, and a plain-language summary.","failureModes":["Missing required query parameters (lengthFt, widthFt, heightFt) returns an error","Non-numeric values for dimension fields cause validation failure","Zero or negative dimensions produce nonsensical results","Very small rooms may round up significantly due to quart rounding logic","includeCeiling value other than 'yes' defaults to no ceiling"],"whenToPreferThis":"Use this endpoint when you need a quick, accurate paint quantity estimate for a rectangular interior room, especially when you want automatic deduction for doors and windows and rounding to purchasable quart increments. Ideal for home improvement planning agents, contractor quoting tools, or shopping list generators. Prefer this over manual calculation when coats and coverage-per-gallon customization matter.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T13:15:03.255Z","isFirstParty":false,"canonicalSlug":"paint-coverage-calculator-faa02950"}