Unit definitions

Food calorie (large calorie)

$10^{3}$ small calories is a food calorie. When we talk about calories in our food, we usually mean large calories.

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 Food calorie (large calorie) to British thermal unit

$$\text{Energy}_{\text{Btu}} = \text{Energy}_{\text{kcal}} \cdot 3.968305120087957083009497090212879$$

Examples

Example 1

Convert $35.0\ \text{kcal}$ to $\text{Btu}$.

$$\text{Energy}_{\text{Btu}} = 35.0 \cdot 3.968305120087957083009497090212879$$

$$\text{Energy}_{\text{Btu}} = 138.890679$$

$$\therefore \ 35.0\ \text{kcal} = 138.890679 \ \text{Btu}$$

Example 2

Convert $85.0\ \text{kcal}$ to $\text{Btu}$.

$$\text{Energy}_{\text{Btu}} = 85.0 \cdot 3.968305120087957083009497090212879$$

$$\text{Energy}_{\text{Btu}} = 337.305935$$

$$\therefore \ 85.0\ \text{kcal} = 337.305935 \ \text{Btu}$$

Example 3

Convert $115.0\ \text{kcal}$ to $\text{Btu}$.

$$\text{Energy}_{\text{Btu}} = 115.0 \cdot 3.968305120087957083009497090212879$$

$$\text{Energy}_{\text{Btu}} = 456.355089$$

$$\therefore \ 115.0\ \text{kcal} = 456.355089 \ \text{Btu}$$

Example 4

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

$$\text{Energy}_{\text{Btu}} = 145.0 \cdot 3.968305120087957083009497090212879$$

$$\text{Energy}_{\text{Btu}} = 575.404242$$

$$\therefore \ 145.0\ \text{kcal} = 575.404242 \ \text{Btu}$$

Example 5

Convert $180.0\ \text{kcal}$ to $\text{Btu}$.

$$\text{Energy}_{\text{Btu}} = 180.0 \cdot 3.968305120087957083009497090212879$$

$$\text{Energy}_{\text{Btu}} = 714.294922$$

$$\therefore \ 180.0\ \text{kcal} = 714.294922 \ \text{Btu}$$

Food calorie (large calorie) to British thermal unit conversion table

Food calorie (large calorie) to British thermal unit conversion table

Food calorie (large calorie) [kcal]	British thermal unit [Btu]
1	3.968305
2	7.93661
3	11.904915
4	15.87322
5	19.841526
6	23.809831
7	27.778136
8	31.746441
9	35.714746
10	39.683051

Convert Food calorie (large calorie) to other Energy units

Convert Food calorie (large calorie) to other Energy units

Food calorie (large calorie) [kcal]	Other unit
1	4186.8 Joule [J]
1	4.1868 Kilojoule [kJ]
1	1000.669216 Calorie (small calorie) [cal]
1	0.00004 Therm [thm]
1	26131952998320855371547.706585 Electronvolt [eV]
1	26131952998320855371.547707 Kilo-electronvolt [keV]
1	26131952998320855.371548 Mega-electronvolt [MeV]
1	26131952998320.855372 Giga-electronvolt [GeV]
1	26131952998.320855 Tera-electronvolt [TeV]