Question 1

What is a therm?

Accepted Answer

100,000 BTU = 105.5 MJ. Used for natural gas billing in US and UK.

Question 2

How do you convert therms to megajoules?

Accepted Answer

Multiply therms by 105.5. Example: 10 therms = 1055 MJ.

Question 3

What's the difference between energy and power?

Accepted Answer

Energy (joules, kWh) is total work done. Power (watts) is energy per unit time. A 100W bulb for 10 hours = 1 kWh of energy.

Question 4

Why are there so many energy units?

Accepted Answer

Different fields developed their own: BTU for heating, calories for nutrition, joules for physics, kWh for electricity billing.

Therm to Mj Energy Converter - Free Online Tool

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