# Joule to Calorie

Convert joules to calories with selectable calorie standard and configurable precision

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

- **Category:** Math & Numbers

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

## Overview

The Joule to Calorie converter allows you to quickly translate energy values from joules (J) to calories (cal) using either the Thermochemical or International Steam Table standards, with customizable decimal precision.

## Inputs

- **Value** (number): e.g. 418.4
- **Calorie Standard** (select)
- **Decimal Precision** (number)

## When to use

- When converting scientific energy measurements in joules to thermal or nutritional calories.
- When you need to choose between specific conversion standards like Thermochemical or International Steam Table.
- When formatting energy data for reports that require a specific number of decimal places.

## How it works

- Enter the energy value in joules (J) that you want to convert.
- Select your preferred calorie standard, choosing either Thermochemical (1 cal = 4.184 J) or International Steam Table (1 cal = 4.1868 J).
- Set the desired decimal precision for the output.
- Click calculate to instantly view the converted calorie value and summary.

## Use cases

- Converting thermodynamic experimental data from joules to thermochemical calories for research papers.
- Translating mechanical work values in joules into nutritional calories for fitness or dietary tracking.
- Standardizing engineering calculations that mix SI units (joules) and steam table units (calories).

## 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, whereas the International Steam Table standard defines 1 calorie as exactly 4.1868 joules.

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

Yes, you can convert to calories first, and then divide the result by 1,000 to get kilocalories (kcal).

### What is the default decimal precision of the converter?

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

### Is this tool suitable for physics and chemistry calculations?

Yes, it supports standard scientific conversion factors, making it suitable for physics, chemistry, and thermodynamics work.

### Does this tool support negative joule values?

Yes, you can input negative values to represent changes in energy or heat loss.

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