---
title: "Paint Calculator: How Much Paint Do I Need?"
method: POST
path: "/api/v1/tools/paint-calculator"
tags: ["home"]
---

# Paint Calculator: How Much Paint Do I Need?

`POST /api/v1/tools/paint-calculator`

## Request

- Base URL: `https://calcfleet.com`
- URL: `https://calcfleet.com/api/v1/tools/paint-calculator`
- Auth: none declared

Calculate exactly how much paint you need for any room. Enter room dimensions, number of coats, doors, windows, and paint coverage to get total liters and cans.

## Request body

- object
  - `roomLengthM` number, required
  - `roomWidthM` number, required
  - `wallHeightM` number, required
  - `coats` integer, required
  - `doors` integer, required
  - `windows` integer, required
  - `coveragePerLiterM2` number, required
  - `includeCeiling` boolean, required

## Response `200`

Successful calculation result.

- object
  - `result` object, required: Structured calculation output (fields vary per calculator).

## Other responses

- `400`: Invalid input — the issues array contains Zod validation errors.
- `403`: Forbidden — an Authorization: Bearer cf_… key was supplied but is invalid.
- `404`: Unknown tool slug.

---

[API](https://skmtc.dev/calcfleet/apis/calcfleet-financial-calculators-api.md) · [All operations](https://skmtc.dev/calcfleet/apis/calcfleet-financial-calculators-api/llms.txt) · [OpenAPI document](https://skmtc.dev/calcfleet/apis/calcfleet-financial-calculators-api/revisions/cd9abd595bbe?raw)