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Paint Coverage Calculator
x402
Paint Coverage Calculator is a paid API for AI agents from construction-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
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.
Price / call$0.02
Success—
StatusUnknown
How this service works
Gallons of paint for a room from its size, doors, windows and coats; optional ceiling. Rounds up to the quart.
Output
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.
Example use cases
Bedroom repaint estimate
“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?”
Full room paint with ceiling
“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?”
Custom coverage label painting job
“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?”
Technical details
Endpoint
GEThttps://construction-calc.x402tookit.com/paint-coverage?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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