btu to therms | Exact Decimal + Formula
1 BTU = 0.00001 Therm
One therm equals about 100 thousand btu (exactly 99994.70619 BTU). Real-world use: HVAC heating and cooling ratings, gas appliances, and barbecue grills. This page expresses those values in therms, which is used for natural-gas billing in the US and UK, and large-scale heating calculations. Use the calculator above, then check the reference table for common values from 0.001 to 1000.
About BTU and Therm
BTU (BTU)
A British thermal unit (BTU) is the heat needed to raise one pound of water by one degree Fahrenheit, about 1,055 joules.
Where it's used: HVAC heating and cooling ratings, gas appliances, and barbecue grills.
Therm (therm)
A therm is 100,000 BTUs.
Where it's used: Natural-gas billing in the US and UK, and large-scale heating calculations.
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Formula
therm = BTU × 0.000010001
To convert BTU to Therm, use the formula displayed above.
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BTU to Therm: Quick Reference Table
| BTU | Therm (Decimal) | Fraction |
|---|---|---|
| 0.001 BTU | 1.0001e-8 therm | - |
| 0.01 BTU | 1.0001e-7 therm | - |
| 0.1 BTU | 0.000001 therm | - |
| 0.5 BTU | 0.000005 therm | - |
| 1 BTU | 0.00001 therm | - |
| 2 BTU | 0.00002 therm | - |
| 5 BTU | 0.00005 therm | - |
| 10 BTU | 0.0001 therm | - |
| 25 BTU | 0.00025 therm | - |
| 50 BTU | 0.0005 therm | - |
| 100 BTU | 0.001 therm | - |
| 250 BTU | 0.0025 therm | - |
| 500 BTU | 0.005 therm | - |
| 1000 BTU | 0.010001 therm | - |
BTU to therm Formula and Examples
Direct Formula
therm = BTU × 0.000010001 Inverse Formula
BTU = therm × 99994.706193 Mental Math Shortcut
Divide the value by roughly 99994.7 to quickly estimate the converted result.
Common BTU to Therm Calculations
- 5 BTU = 0.00005 therm
- 10 BTU = 0.0001 therm
- 50 BTU = 0.0005 therm
- 100 BTU = 0.001 therm
- 500 BTU = 0.005 therm
Precision & Practical Use
For example, 10 BTU = 0.0001 therm — roughly fractional unit measurement.
Utility bills and appliance ratings are given in whole kWh or BTU. Round converted figures to match the source document you're comparing against.
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How to Convert BTU to Therm
How many therms are in one btu?
One BTU (BTU) equals 0.00001 Therm (therm). To convert btus to therms, multiply the btu value by 0.00001.
How do I convert BTU to Therm?
Multiply your btu value by 0.00001 to get the result in Therm: therm = BTU × 0.00001. For example, 5 BTU = 0.00005 therm.
What is the formula for converting BTU to therm?
The conversion formula is therm = BTU × 0.00001. Use the calculator above for any value, and see the reference table below for common inputs from 0.001 to 1000.
Is there a quick mental estimate for BTU to therm?
Divide the value by roughly 99994.7 to quickly estimate the converted result.
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