---
title: "Recipe Scaler / Serving Size Calculator"
method: POST
path: "/api/v1/tools/recipe-scaler-calculator"
tags: ["cooking"]
---

# Recipe Scaler / Serving Size Calculator

`POST /api/v1/tools/recipe-scaler-calculator`

## Request

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

Scale any recipe up or down: enter the original and desired servings, and this tool multiplies every ingredient by the exact ratio so amounts stay balanced.

## Request body

- object
  - `originalServings` number, required
  - `desiredServings` number, required
  - `ingredients` object[], required
    - `name` string, required
    - `qty` number, required
    - `unit` string, 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)