Unit definitions

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.

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 $4.184 \ \text{J}$.

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

$$\text{Energy}_{\text{cal}} = \text{Energy}_{\text{Btu}} \cdot 252.1653919694072657743785850860421$$

Examples

Example 1

Convert $50.0\ \text{Btu}$ to $\text{cal}$.

$$\text{Energy}_{\text{cal}} = 50.0 \cdot 252.1653919694072657743785850860421$$

$$\text{Energy}_{\text{cal}} = 12608.269598$$

$$\therefore \ 50.0\ \text{Btu} = 12608.269598 \ \text{cal}$$

Example 2

Convert $65.0\ \text{Btu}$ to $\text{cal}$.

$$\text{Energy}_{\text{cal}} = 65.0 \cdot 252.1653919694072657743785850860421$$

$$\text{Energy}_{\text{cal}} = 16390.750478$$

$$\therefore \ 65.0\ \text{Btu} = 16390.750478 \ \text{cal}$$

Example 3

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

$$\text{Energy}_{\text{cal}} = 100.0 \cdot 252.1653919694072657743785850860421$$

$$\text{Energy}_{\text{cal}} = 25216.539197$$

$$\therefore \ 100.0\ \text{Btu} = 25216.539197 \ \text{cal}$$

Example 4

Convert $135.0\ \text{Btu}$ to $\text{cal}$.

$$\text{Energy}_{\text{cal}} = 135.0 \cdot 252.1653919694072657743785850860421$$

$$\text{Energy}_{\text{cal}} = 34042.327916$$

$$\therefore \ 135.0\ \text{Btu} = 34042.327916 \ \text{cal}$$

Example 5

Convert $190.0\ \text{Btu}$ to $\text{cal}$.

$$\text{Energy}_{\text{cal}} = 190.0 \cdot 252.1653919694072657743785850860421$$

$$\text{Energy}_{\text{cal}} = 47911.424474$$

$$\therefore \ 190.0\ \text{Btu} = 47911.424474 \ \text{cal}$$

British thermal unit to Calorie (small calorie) conversion table

British thermal unit to Calorie (small calorie) conversion table

British thermal unit [Btu]	Calorie (small calorie) [cal]
1	252.165392
2	504.330784
3	756.496176
4	1008.661568
5	1260.82696
6	1512.992352
7	1765.157744
8	2017.323136
9	2269.488528
10	2521.65392

Convert British thermal unit to other Energy units

Convert British thermal unit to other Energy units

British thermal unit [Btu]	Other unit
1	1055.06 Joule [J]
1	1.05506 Kilojoule [kJ]
1	0.251997 Food calorie (large calorie) [kcal]
1	0.00001 Therm [thm]
1	6585167271044330196881.896271 Electronvolt [eV]
1	6585167271044330196.881896 Kilo-electronvolt [keV]
1	6585167271044330.196882 Mega-electronvolt [MeV]
1	6585167271044.330197 Giga-electronvolt [GeV]
1	6585167271.04433 Tera-electronvolt [TeV]