---
title: "Percent Error Calculator"
method: GET
path: "/api/calc/percent-error-calculator"
tags: ["Math"]
---

# Percent Error Calculator

`GET /api/calc/percent-error-calculator`

## Request

- Base URL: `https://calcbright.com`
- URL: `https://calcbright.com/api/calc/percent-error-calculator`
- Auth: none declared

Measured 9.6 when the accepted value is 9.81? That is a 2.14% error. Get percent, absolute, relative and signed error for lab reports and experiments.

## Query parameters

- `measured` number: Experimental (measured) value
- `actual` number: Theoretical (true) value

## Response `200`

Calculation result

- CalcOutput
  - `ok` boolean
  - `tool` string
  - `name` string
  - `url` string: Open this link to see the full calculation
  - `inputs` object
  - `summary` string: Plain-text answer
  - `details` string
  - `result` object
  - `errors` object

## Other responses

- `400`: Invalid input (see errors)

---

[API](https://skmtc.dev/calcbright/apis/calcbright-calculator-api.md) · [All operations](https://skmtc.dev/calcbright/apis/calcbright-calculator-api/llms.txt) · [OpenAPI document](https://skmtc.dev/calcbright/apis/calcbright-calculator-api/revisions/f58229e56e58?raw)