# Calorie to Joule

Convert calories to joules with selectable calorie standard and configurable precision

> Canonical page: https://elysiatools.com/en/tools/calorie-to-joule

- **Category:** Math & Numbers

- **Keywords:** energy conversion, cal, j, joule, calorie, kcal

## Overview

The Calorie to Joule converter allows you to instantly translate energy values from calories (cal) to joules (J). It supports both the Thermochemical and International Steam Table standards, with customizable decimal precision for accurate scientific, engineering, or nutritional calculations.

## Inputs

- **Value** (number): e.g. 100
- **Calorie Standard** (select)
- **Decimal Precision** (number)

## When to use

- When converting nutritional energy values from calories to joules for food labeling or dietary analysis.
- When performing thermodynamic calculations that require converting thermochemical calories to standard SI joules.
- When working with steam tables or legacy engineering data that utilize the International Steam Table calorie standard.

## How it works

- Enter the energy value in calories in the input field.
- Select the desired calorie standard: Thermochemical (1 cal = 4.184 J) or International Steam Table (1 cal = 4.1868 J).
- Set the preferred decimal precision for the output.
- Click convert to generate the equivalent energy value in joules.

## Use cases

- Converting dietary calorie values to joules for international food packaging compliance.
- Standardizing laboratory heat measurements from calories to SI joules for academic papers.
- Translating legacy engineering documents using steam table calories into modern joule-based specifications.

## Frequently asked questions

### What is the difference between the Thermochemical and International Steam Table standards?

The Thermochemical standard defines 1 calorie as exactly 4.184 joules, while the International Steam Table standard defines 1 calorie as exactly 4.1868 joules.

### Can I convert kilocalories (kcal) to kilojoules (kJ) using this tool?

Yes, because the ratio remains the same; simply input the kcal value to get the result in kJ.

### What is the default decimal precision?

The default precision is set to 4 decimal places, but you can adjust it from 0 up to 10.

### Is this tool suitable for scientific research?

Yes, it uses precise conversion factors (4.184 J or 4.1868 J) and allows high decimal precision suitable for scientific calculations.

### Does this tool require an internet connection to work?

No, the conversion is computed locally in your browser instantly.

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