Skip to content
RK Calculator
Menu

Megacalories to British Thermal Units Converter

Convert megacalories (Mcal) to British thermal units (IT) (Btu), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter an amount of energy, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
3,965.66683139 Btu
joules (watt-seconds)
4,184,000 J
kilojoules
4,184 kJ
megajoules
4.184 MJ
gigajoules
0.004184 GJ
calories (thermochemical)
1,000,000 cal
kilocalories (food Calories)
1,000 kcal
watt-hours
1,162.22222222 Wh
kilowatt-hours
1.16222222222 kWh
megawatt-hours
0.00116222222222 MWh
million Btu
0.00396566683139 MMBtu
therms (100,000 Btu)
0.0396566683139 thm
quads (10¹⁵ Btu)
3.96566683139 × 10⁻¹² quad
electronvolts
2.61144739675 × 10²⁵ eV
kiloelectronvolts
2.61144739675 × 10²² keV
megaelectronvolts
2.61144739675 × 10¹⁹ MeV

1 Mcal = 3,965.66683139 Btu

Show the working
  1. 1 Mcal = 3965.66683139 Btu
  2. 1 × 3965.66683139 = 3965.66683139 Btu

How to convert megacalories to british thermal units

1 Mcal = 3,965.66683139 Btu, so multiply by 3,965.66683139 to go from megacalories to British thermal units (IT). Going the other way, 1 Btu = 0.000252164400722 Mcal.

Btu = Mcal × 3,965.66683139
Mcal = Btu × 0.000252164400722

Worked example:

1 Mcal = 3965.66683139 Btu
5 × 3965.66683139 = 19828.334157 Btu

Megacalories to british thermal units table

MegacaloriesBritish Thermal Units
1 Mcal3,965.66683139 Btu
2 Mcal7,931.33366278 Btu
3 Mcal11,897.0004942 Btu
4 Mcal15,862.6673256 Btu
5 Mcal19,828.334157 Btu
6 Mcal23,794.0009883 Btu
7 Mcal27,759.6678197 Btu
8 Mcal31,725.3346511 Btu
9 Mcal35,691.0014825 Btu
10 Mcal39,656.6683139 Btu
15 Mcal59,485.0024709 Btu
20 Mcal79,313.3366278 Btu
25 Mcal99,141.6707848 Btu
30 Mcal118,970.004942 Btu
40 Mcal158,626.673256 Btu
50 Mcal198,283.34157 Btu
75 Mcal297,425.012354 Btu
100 Mcal396,566.683139 Btu
250 Mcal991,416.707848 Btu
500 Mcal1,982,833.4157 Btu
1000 Mcal3,965,666.83139 Btu

About the units

Megacalories (Mcal)
Megacalories, a specialised unit. Definition: NIST SP 811 Appendix B.8, factors for units listed alphabetically.
British Thermal Units (Btu)
British thermal units (IT), a US customary unit. Definition: NIST SP 811 Appendix B.8, factors for units listed alphabetically.

Formula version 0.1.0Reviewed