# Paint Coverage Calculator

> 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.

## Facts

- Endpoint: GET https://construction-calc.x402tookit.com/paint-coverage?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/paint-coverage-calculator-faa02950
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oU-HiwuTVhQm3HdQcG6NX

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability paint-coverage-calculator-faa02950
```

Example prompt: 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?

## When to prefer this

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.

## Known failure modes

- 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

## 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.

## Request schema (JSON Schema)

```json
{
 "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"
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/paint-coverage-calculator-faa02950/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from construction-calc.x402tookit.com](https://www.zero.xyz/host/construction-calc.x402tookit.com/llms.txt)