Especially in colder months, a lot of homeowners want to know how to convert therms to MMBTU. This has to do with the use of natural gas for space and water heating (gas furnaces, water heaters). We will show you how to easily convert therms to MMBTU. To make things even easier, you will also get Therms To MMBTU Calculator (just insert therms, get MMBTU) and a chart where we have converted 0.1 to 1,000 therms into MMBTU.
The conversion will become immediately apparent if we just look at these two units:
- Therm is a unit for heat content (usually for natural gas). 1 Therms is equal to 100,000 BTU. As we know, BTU or British Thermal unit is the amount of energy we need to heat 1 pound of water by 1 degree Fahrenheit. You will find therms on your gas bill, denoting the amount of used natural gas.
- MMBTU stands for Metric Million British Thermal Unit. It is also a unit for heat content. 1 MMBTU is equal to 1,000,000 BTU (million BTU).

As we can see, if 1 therm = 100,000 BTU and 1 MMBTU = 1,000,000 BTU, we can easily write this relationship in an equation like this:
MMBTU = Therms / 10
This just means that 1 MMBTU is equal to 10 therms (1 MMBTU = 10 therms). Quite easy conversion, right?
Quick Example: How many MMBTU is 100 therms? Let’s use the equation to convert this:
MMBTU (100 Therms) = 100 Therms / 10 = 10 MMBTU
100 therms is equal to 10 MMBTU. This conversion is very simple. Here is the Therms To MMBTU Calculator that makes this conversion automatically. Further on, we have also converted 0.1 therms to 1000 therms into MMBTU and gathered the results in a chart you can consult:
Therms To MMBTU Calculator
Alright, let’s figure out how many MMBTU is 32 therms. Just slide the slider to ’32’ and you get the result: 32 therms is equal to 3.2 MMBTU.
Here is the full conversion chart:
Therms To MMBTU Chart
Therms: | MMBTU |
0.1 Therms | 0.01 MMBTU |
0.5 Therms | 0.05 MMBTU |
1 Therm | 0.10 MMBTU |
2 Therms | 0.20 MMBTU |
3 Therms | 0.30 MMBTU |
4 Therms | 0.40 MMBTU |
5 Therms | 0.50 MMBTU |
6 Therms | 0.60 MMBTU |
7 Therms | 0.70 MMBTU |
8 Therms | 0.80 MMBTU |
9 Therms | 0.90 MMBTU |
10 Therms | 1.00 MMBTU |
20 Therms | 2.00 MMBTU |
30 Therms | 3.00 MMBTU |
40 Therms | 4.00 MMBTU |
50 Therms | 5.00 MMBTU |
60 Therms | 6.00 MMBTU |
70 Therms | 7.00 MMBTU |
80 Therms | 8.00 MMBTU |
90 Therms | 9.00 MMBTU |
100 Therms | 10 MMBTU |
150 Therms | 15 MMBTU |
200 Therms | 20 MMBTU |
250 Therms | 25 MMBTU |
300 Therms | 30 MMBTU |
400 Therms | 40 MMBTU |
500 Therms | 50 MMBTU |
1000 Therms | 100 MMBTU |
As you can see, MMBTU is a 10-times bigger unit for natural gas heat content than a therm.
Example: How many MMBTU is 70 therms? You can easily consult this chart to get the result: 70 therms is equal to 7 MMBTU.
With the formula, calculator, and this chart, you will be able to (quite easily) convert therms to MMBTU. If you encounter any problems, you can use the comments below, give us some numbers, and we will help you out.