Unit definitions

Calorie (small calorie)

The small calorie is the thermal energy required to raise the temperature of one gram of water by one degree Celsius. It is equal to $4.184 \ \text{J}$.

British thermal unit

The British thermal unit (Btu) is the amount of thermal energy required to raise the temperature of one pound of water by one degree Fahrenheit.

How to convert Calorie (small calorie) to British thermal unit

$$\text{Energy}_{\text{Btu}} = \text{Energy}_{\text{cal}} \cdot 0.003965651242583360188046177468579986$$

Examples

Example 1

Convert $30.0\ \text{cal}$ to $\text{Btu}$.

$$\text{Energy}_{\text{Btu}} = 30.0 \cdot 0.003965651242583360188046177468579986$$

$$\text{Energy}_{\text{Btu}} = 0.11897$$

$$\therefore \ 30.0\ \text{cal} = 0.11897 \ \text{Btu}$$

Example 2

Convert $80.0\ \text{cal}$ to $\text{Btu}$.

$$\text{Energy}_{\text{Btu}} = 80.0 \cdot 0.003965651242583360188046177468579986$$

$$\text{Energy}_{\text{Btu}} = 0.317252$$

$$\therefore \ 80.0\ \text{cal} = 0.317252 \ \text{Btu}$$

Example 3

Convert $100.0\ \text{cal}$ to $\text{Btu}$.

$$\text{Energy}_{\text{Btu}} = 100.0 \cdot 0.003965651242583360188046177468579986$$

$$\text{Energy}_{\text{Btu}} = 0.396565$$

$$\therefore \ 100.0\ \text{cal} = 0.396565 \ \text{Btu}$$

Example 4

Convert $145.0\ \text{cal}$ to $\text{Btu}$.

$$\text{Energy}_{\text{Btu}} = 145.0 \cdot 0.003965651242583360188046177468579986$$

$$\text{Energy}_{\text{Btu}} = 0.575019$$

$$\therefore \ 145.0\ \text{cal} = 0.575019 \ \text{Btu}$$

Example 5

Convert $185.0\ \text{cal}$ to $\text{Btu}$.

$$\text{Energy}_{\text{Btu}} = 185.0 \cdot 0.003965651242583360188046177468579986$$

$$\text{Energy}_{\text{Btu}} = 0.733645$$

$$\therefore \ 185.0\ \text{cal} = 0.733645 \ \text{Btu}$$

Calorie (small calorie) to British thermal unit conversion table

Calorie (small calorie) to British thermal unit conversion table

Calorie (small calorie) [cal]	British thermal unit [Btu]
1	0.003966
2	0.007931
3	0.011897
4	0.015863
5	0.019828
6	0.023794
7	0.02776
8	0.031725
9	0.035691
10	0.039657

Convert Calorie (small calorie) to other Energy units

Convert Calorie (small calorie) to other Energy units

Calorie (small calorie) [cal]	Other unit
1	4.184 Joule [J]
1	0.004184 Kilojoule [kJ]
1	0.000999 Food calorie (large calorie) [kcal]
1	3.965651242583360188046177468579986E-8 Therm [thm]
1	26114476771036223099.87475 Electronvolt [eV]
1	26114476771036223.099875 Kilo-electronvolt [keV]
1	26114476771036.2231 Mega-electronvolt [MeV]
1	26114476771.036223 Giga-electronvolt [GeV]
1	26114476.771036 Tera-electronvolt [TeV]