# Kcal to KJ

Convert kilocalories to kilojoules with configurable decimal precision

> Canonical page: https://elysiatools.com/en/tools/kcal-to-kj

- **Category:** Math & Numbers

- **Keywords:** kcal, kj, energy, nutrition, conversion

## Overview

Enter kilocalories and convert with the nutrition standard 1 kcal = 4.184 kJ.

## Inputs

- **Kilocalories** (number): e.g. 100
- **Decimal Precision** (number)

## When to use

- When translating food energy values from kilocalories to kilojoules for international nutrition labeling.
- When calculating dietary energy intake for scientific research or fitness tracking using metric units.
- When converting recipe energy metrics to comply with regional food packaging regulations.

## How it works

- Enter the energy value in kilocalories (kcal) into the input field.
- Set your preferred decimal precision between 0 and 10 decimal places.
- The tool multiplies the input by 4.184 and outputs the result in kilojoules (kJ) as a JSON object.

## Use cases

- Converting recipe calorie counts to kilojoules for European food packaging compliance.
- Standardizing energy metrics in fitness and diet tracking applications.
- Preparing nutritional data tables for academic research papers requiring SI units.

## Frequently asked questions

### What conversion factor is used?

The tool uses the standard nutrition conversion factor of 1 kcal = 4.184 kJ.

### Can I control the decimal precision of the output?

Yes, you can configure the decimal precision from 0 up to 10 decimal places.

### What is the default decimal precision?

The default precision is set to 4 decimal places.

### Does this tool support bulk file uploads?

No, this tool processes single numeric inputs directly.

### What format is the output returned in?

The output is returned as a JSON object containing the input kilocalories and the converted kilojoules.

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