---
title: "Convert any number to scientific notation and engineering notation. Returns the coefficient, exponent, a formatted string with Unicode superscripts (e.g. '3.14 × 10²'), and engineering notation where the exponent is a multiple of 3. Useful for expressing very large or very small values compactly, common in physics, electronics (picofarads, gigahertz), and astronomy. Accepts output from sig_figs and log_calc for precision-aware formatting."
method: POST
path: "/api/scientific_notation"
tags: ["general"]
---

# Convert any number to scientific notation and engineering notation. Returns the coefficient, exponent, a formatted string with Unicode superscripts (e.g. '3.14 × 10²'), and engineering notation where the exponent is a multiple of 3. Useful for expressing very large or very small values compactly, common in physics, electronics (picofarads, gigahertz), and astronomy. Accepts output from sig_figs and log_calc for precision-aware formatting.

`POST /api/scientific_notation`

## Request

- Base URL: `https://calc.engineer`
- URL: `https://calc.engineer/api/scientific_notation`
- Auth: none declared

## Request body

- object
  - `value` number, required: The number to convert to scientific notation

## Response `200`

Computed result for scientific_notation

- object
  - `result` object, required
    - `coefficient` number, required: The coefficient (mantissa) between 1 and 10
    - `exponent` number, required: The power-of-10 exponent
    - `notation_string` string, required: Formatted scientific notation with Unicode superscripts (e.g. '3.14 × 10²')
    - `engineering_notation` string, required: Engineering notation with exponent divisible by 3
  - `tool` string, required
  - `version` string, required
  - `computed_at` string, date-time, required
  - `chain` object, required
    - `feeds` unknown[]
      - unknown
    - `accepts_from` unknown[]
      - unknown

## Other responses

- `400`: Validation error or invalid JSON
- `404`: Tool not found

---

[API](https://skmtc.dev/calc/apis/calc-engineer-api.md) · [All operations](https://skmtc.dev/calc/apis/calc-engineer-api/llms.txt) · [OpenAPI document](https://skmtc.dev/calc/apis/calc-engineer-api/revisions/8830480ec488?raw)