MeasureCalc

Convert Joule (J) to Calorie (cal)

Category: Energy

0.239006 cal

1 j = 0.239006 cal

High-precision rounding: 6 decimals

How to convert joule (j) to calorie (cal)

Energy is the capacity to do work. Joules form the SI base; Wh/kWh align with metering and batteries; calories and BTU survive in nutrition and HVAC. Conversions bridge mechanical, thermal, and electrical perspectives.

This converter calculates Joule (J) to Calorie (cal) values by using the correct conversion rule for the Energy category. For linear units, standardized factors are used. For temperature, the calculator applies the proper formula with offsets.

Share this conversion: /convert/joule-to-calorie

Quick conversion table

Handy values for Joule (J) to Calorie (cal). Click a value to open that exact result.

Joule (J) Calorie (cal)
1 0.239006
0.5 0.119503
2.5 0.597514
10 2.390057

Conversion formula

Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).

Common mistakes

  • Confusing calorie (cal) with kilocalorie (kcal) on nutrition labels.
  • Treating BTU definitions interchangeably without noting standard (IT vs other).

Unit facts

  • Joule (J): Joule (J) is the SI unit of energy: 1 J = 1 N·m = 1 kg·m²/s².
  • Calorie (cal): A small calorie (cal) heats 1 g of water by 1 °C; nutrition ‘Calorie’ means kilocalorie (kcal).

About Joule (J)

Joule (J)

SI energy unit equal to N·m. Fundamental in physics, electronics (J = W·s), and thermodynamics.

History: Named after James P. Joule. Became universal with SI coherence across mechanical and electrical domains.

About Calorie (cal)

Calorie (cal)

Energy to raise 1 g of water by 1 °C; several legacy variants exist. In nutrition, ‘calorie’ often means kilocalorie.

History: Thermochemistry used multiple definitions; modern practice relates calories to joules (1 cal ≈ 4.184 J).

Frequently asked questions

How many Calorie (cal) are in one Joule (J)?
1 Joule (J) equals 0.239006 Calorie (cal).
Is Joule (J) to Calorie (cal) conversion exact?
Many unit conversions are exact by definition, while others use standardized conversion constants.
What is the fastest way to convert Joule (J) to Calorie (cal)?
Enter a value in Joule (J), choose Calorie (cal) as the target unit, and the calculator will instantly return the result.

Convert Joule (J) to other units

Convert other units to Calorie (cal)