Calorie (th) to Calorie (IT) Converter

Energy Converter

27 units available

Decimals:

From

To

0.999331

1 cal = 0.999331 cal (IT)

Formula:

cal (IT) = cal × 0.9993312315

With your value: 1 cal = 0.99933123 cal (IT)

How big is that?

Everyday references on a logarithmic scale, all expressed in calorie (th) so you can sanity-check the result.

Heartbeat (1/4.2 your value)0.239 cal

Your value1.00 cal

AA battery charge (2.4e+3× your value)2.39e+3 cal

Slice of bread (6.7e+4× your value)6.69e+4 cal

Daily food intake (2.0e+6× your value)2.01e+6 cal

Litre of petrol (8.2e+6× your value)8.17e+6 cal

Other Calorie (th) to Calorie (IT) conversions

2 cal to cal (IT)3 cal to cal (IT)4 cal to cal (IT)5 cal to cal (IT)6 cal to cal (IT)7 cal to cal (IT)8 cal to cal (IT)

Calorie (th) to Calorie (IT) Conversion Table

Calorie (th) (cal)	Calorie (IT) (cal (IT))
0.5	0.499666
1	0.999331
2	1.998662
5	4.996656
10	9.993312
15	14.989968
20	19.986625
25	24.983281
50	49.966562
100	99.933123
250	249.832808
500	499.665616
1000	999.331231

Calorie (IT) to Calorie (th) Conversion Table

Calorie (IT) (cal (IT))	Calorie (th) (cal)
0.5	0.500335
1	1.000669
2	2.001338
5	5.003346
10	10.006692
15	15.010038
20	20.013384
25	25.01673
50	50.033461
100	100.066922
250	250.167304
500	500.334608
1000	1,000.669216

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Calorie (th) (cal)

Energy

Exact conversion

The thermochemical calorie is exactly 4.184 J.

The International Table calorie (4.1868 J) and the 15 °C calorie differ slightly.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Calorie (IT) (cal (IT))

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Calorie (th) to Calorie (IT)

To convert from Calorie (th) (cal) to Calorie (IT) (cal (IT)), multiply the value by 0.9993312315.

Formula: cal (IT) = cal × 0.9993312315

Reverse: cal = cal (IT) × 1.0006692161

Step-by-Step Example

Start with your value in Calorie (th). For example: 5 cal
Multiply by the conversion factor: 5 x 0.9993312315
The result is: 4.996656 cal (IT)

About Calorie (th)

The thermochemical calorie equals 4.184 joules. Not to be confused with the food Calorie (kcal), which equals 1,000 calories.

Common uses: chemistry, nutrition, heating.

About Calorie (IT)

The calorie (it) (cal (IT)) is a unit of energy and work. One calorie (it) equals 4.1868 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: energy calculations, engineering and science, education.

Frequently Asked Questions

How many Calorie (IT) are in 1 Calorie (th)?

There are exactly 0.9993312315 Calorie (IT) in 1 Calorie (th). This means the conversion factor from Calorie (th) to Calorie (IT) is 0.9993312315.

What is the formula to convert Calorie (th) to Calorie (IT)?

The formula to convert Calorie (th) to Calorie (IT) is: cal (IT) = cal × 0.9993312315. For example, to convert 10 Calorie (th) to Calorie (IT), you would multiply 10 by 0.9993312315.

What is a Calorie (th)?