Energy Unit Converter

Energy Unit Converter is evaluated from Energy Value and From Unit. The calculation reports Joules, Kilowatt-Hours and BTU.

Results

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About the Energy Unit Converter

Energy Unit Converter is treated here as a quantitative relation between Energy Value and From Unit and Joules, Kilowatt-Hours, BTU and Kilocalories.

The calculator uses a multi formula configuration. Each reported value is read as a direct evaluation of the stored rules with the declared field formats and units.

Formula basis:
1 kWh = 3,600,000 J
1 BTU = 1,055.06 J
1 kcal = 4,184 J
1 MJ = 1,000,000 J
1 therm = 105,480,400 J

Interpret the outputs in the order shown by the result fields. Optional inputs affect only the outputs that depend on those variables.

Formula & How It Works

The calculation applies the following relations exactly as recorded in the metadata:

1 kWh = 3,600,000 J
1 BTU = 1,055.06 J
1 kcal = 4,184 J
1 MJ = 1,000,000 J
1 therm = 105,480,400 J

Each output field is produced by substituting the supplied inputs into the relevant relation and then applying the declared rounding or text format.

Worked Examples

Example 1: Monthly Electricity Bill: 877 kWh

Inputs

value: 877 from_unit: kilowatt-hours (kWh)
Joules: 3,157,200,000 J. Kilowatt-Hours: 877 kWh. BTU: 2,992,436.449 BTU. Kilocalories: 754,588.9101 kcal. Megajoules: 3,157.2 MJ

With Energy Value = 877 and From Unit = kilowatt-hours (kWh) as the stated inputs, the result is Joules = 3,157,200,000 J, Kilowatt-Hours = 877 kWh and BTU = 2,992,436.449 BTU. Each value corresponds to the declared output fields.

Example 2: Natural Gas: 1 Therm

Inputs

value: 1 from_unit: therms
Joules: 105,480,400 J. Kilowatt-Hours: 29.300111 kWh. BTU: 99,975.736 BTU. Kilocalories: 25,210.4207 kcal. Megajoules: 105.4804 MJ

With Energy Value = 1 and From Unit = therms as the stated inputs, the result is Joules = 105,480,400 J, Kilowatt-Hours = 29.300111 kWh and BTU = 99,975.736 BTU. Each value corresponds to the declared output fields.

Example 3: Snickers Bar: 250 kcal

Inputs

value: 250 from_unit: kilocalories (kcal)
Joules: 1,046,000 J. Kilowatt-Hours: 0.290556 kWh. BTU: 991.413 BTU. Kilocalories: 250 kcal. Megajoules: 1.046 MJ

With Energy Value = 250 and From Unit = kilocalories (kcal) as the stated inputs, the result is Joules = 1,046,000 J, Kilowatt-Hours = 0.290556 kWh and BTU = 991.413 BTU. Each value corresponds to the declared output fields.

Example 4: Home Air Conditioner: 12,000 BTU/hr (1 ton)

Inputs

value: 12000 from_unit: BTU
Joules: 12,660,720 J. Kilowatt-Hours: 3.516867 kWh. BTU: 12,000 BTU. Kilocalories: 3,025.9847 kcal. Megajoules: 12.66072 MJ

With Energy Value = 12,000 and From Unit = BTU as the stated inputs, the result is Joules = 12,660,720 J, Kilowatt-Hours = 3.516867 kWh and BTU = 12,000 BTU. Each value corresponds to the declared output fields.

Common Use Cases

  • Convert electricity consumption from kWh to BTU for HVAC sizing
  • Convert food calories to joules for science class
  • Convert natural gas BTU to kWh for energy comparison