How do I convert J to kcal?

Use the formula shown above or enter a value to see J converted to kcal instantly.

What is the formula for J to kcal?

The converter calculates kcal by applying the category-specific conversion factor for Energy.

When should I use J vs kcal?

J and kcal are both part of the Energy category; pick the unit that matches your measurement context (e.g., scale, region, or industry standard).

Energy Conversion Guide

Convert J to kcal

Use the live converter below to translate between Joule (J) and Kilocalorie (food) (kcal). Scroll further for quick examples, formula tips, and related units.

Formula insight: Most unit conversions use a simple multiplication or division by a conversion factor. The calculator shows the exact formula used.

Convert

J → kcal

Joule

Kilocalorie (food)

0.0002

kcal

Rounded result (4 decimals max)

Formula

1 J = 0.0002 kcal

Conversion sourcesTap or click to view references

The International System of Units (SI) — NIST Special Publication 330
National Institute of Standards and Technology (NIST). The SI Brochure (SP 330) is the definitive English edition of the BIPM SI tables. NIST’s edition lists the official constants and conversion factors tying inch-pound units to SI, which SwapUnits applies for length, mass, temperature, pressure, volume, and related conversions. See /standards/nist-si-tenfold for the complete decimal multiple/submultiple table. View source · View SI table

Results update as you type. Swap the direction to convert back from kcal to J.

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J to kcal quick table

Multiply any row by the same factor to scale results. Use the converter above to enter exact values with your own units.

Joule (J)	Kilocalorie (food) (kcal)
0.25 J	0.0001 kcal
0.5 J	0.0001 kcal
1 J	0.0002 kcal
2 J	0.0005 kcal
5 J	0.0012 kcal
10 J	0.0024 kcal
25 J	0.006 kcal
100 J	0.0239 kcal

kcal back to J

Keep the reciprocal handy when double-checking calculations or undoing a conversion.

Kilocalorie (food) (kcal)	Joule (J)
0.25 kcal	1,046 J
0.5 kcal	2,092 J
1 kcal	4,184 J
2 kcal	8,368 J
5 kcal	20,920 J
10 kcal	41,840 J
25 kcal	104,600 J
100 kcal	418,400 J

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