Did you mean to convert |
calorie [15 °C] calorie [I.T.] calorie [nutritional] calorie [thermochemical] |
to |
attojoule |

How many calorie in 1 attojoule?
The answer is 2.3890295761862E-19.

We assume you are converting between **calorie [15 °C]** and **attojoule**.

You can view more details on each measurement unit:

calorie or
attojoule

The SI derived unit for **energy** is the joule.

1 joule is equal to 0.23890295761862 calorie, or 1.0E+18 attojoule.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between calories and attojoules.

Type in your own numbers in the form to convert the units!

1 calorie to attojoule = 4.1858E+18 attojoule

2 calorie to attojoule = 8.3716E+18 attojoule

3 calorie to attojoule = 1.25574E+19 attojoule

4 calorie to attojoule = 1.67432E+19 attojoule

5 calorie to attojoule = 2.0929E+19 attojoule

6 calorie to attojoule = 2.51148E+19 attojoule

7 calorie to attojoule = 2.93006E+19 attojoule

8 calorie to attojoule = 3.34864E+19 attojoule

9 calorie to attojoule = 3.76722E+19 attojoule

10 calorie to attojoule = 4.1858E+19 attojoule

You can do the reverse unit conversion from attojoule to calorie, or enter any two units below:

calorie to kilocalorie

calorie to decijoule

calorie to nanojoule

calorie to gigajoule

calorie to gram calorie

calorie to Q unit

calorie to pferdestärkenstunde

calorie to ton

calorie to thermie

calorie to Btu

15 °C calorie: the amount of energy required to warm 1 g of air-free water from 14.5 °C to 15.5 °C at a constant pressure of 101.325 kPa (1 atm). Experimental values of this calorie ranged from 4.1852 J to 4.1858 J. The CIPM in 1950 published a mean experimental value of 4.1855 J, noting an uncertainty of 0.0005 J.

The SI prefix "atto" represents a factor of
10^{-18}, or in exponential notation, 1E-18.

So 1 attojoule = 10^{-18} joules.

The definition of a joule is as follows:

The joule (symbol J, also called newton meter, watt second, or coulomb volt) is the SI unit of energy and work. The unit is pronounced to rhyme with "tool", and is named in honor of the physicist James Prescott Joule (1818-1889).

**ConvertUnits.com** provides an online
conversion calculator for all types of measurement units.
You can find metric conversion tables for SI units, as well
as English units, currency, and other data. Type in unit
symbols, abbreviations, or full names for units of length,
area, mass, pressure, and other types. Examples include mm,
inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm,
metres squared, grams, moles, feet per second, and many more!