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BTU to US therms Converter

1 BTU = 1.0002 × 10^−5 thm (BTU → US therm)

1 BTU = 1.0002 × 10^−5 thm

1 BTU equals 1.0002 × 10^−5 US therms. To convert BTU to US therms, multiply the BTU value by 1.0002 × 10^−5. For quick reference: 1 BTU = 1.0002 × 10^−5 thm, 5 BTU = 5.0012 × 10^−5 thm, 10 BTU = 0.000100024 thm, 100 BTU = 0.00100024 thm.

1.0002 × 10^−5
FormulaUS therms = BTU × 1.0002 × 10^−5
Quick

How to convert BTU to US therms

  1. Take your value

    Start with your value in BTU.

  2. Multiply by 1.0002 × 10^−5

    Multiply the BTU value by 1.0002 × 10^−5. This is the exact conversion factor from BTU to US therms.

  3. Read the result

    The product is your value in US therms. For example, 5 BTU × 1.0002 × 10^−5 = 5.0012 × 10^−5 thm.

Conversion formula

The exact factor from BTU to US therms is 1.0002 × 10^−5.

US therms = BTU × 1.0002 × 10^−5

BTU to US therms conversion table

Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.

Conversion table from BTU to US therms
BTU (BTU)US therms (thm)
0.001 BTU1.0002 × 10^−8 thm
0.01 BTU1.0002 × 10^−7 thm
0.1 BTU1.0002 × 10^−6 thm
0.5 BTU5.0012 × 10^−6 thm
1 BTU1.0002 × 10^−5 thm
1.5 BTU1.5004 × 10^−5 thm
2 BTU2.0005 × 10^−5 thm
5 BTU5.0012 × 10^−5 thm
10 BTU0.00010002 thm
20 BTU0.00020005 thm
50 BTU0.00050012 thm
100 BTU0.0010002 thm
200 BTU0.0020005 thm
250 BTU0.0025006 thm
500 BTU0.0050012 thm
1000 BTU0.010002 thm
2000 BTU0.020005 thm
2500 BTU0.025006 thm
3600 BTU0.036009 thm
5000 BTU0.050012 thm
7500 BTU0.075018 thm
10000 BTU0.10002 thm
25000 BTU0.25006 thm
50000 BTU0.50012 thm
100000 BTU1.0002 thm
250000 BTU2.5006 thm
500000 BTU5.0012 thm
1000000 BTU10.002 thm
2000000 BTU20.005 thm
3600000 BTU36.009 thm
5000000 BTU50.012 thm
10000000 BTU100.02 thm
25000000 BTU250.06 thm
50000000 BTU500.12 thm
100000000 BTU1000.2 thm
250000000 BTU2500.6 thm
500000000 BTU5001.2 thm
1000000000 BTU10002 thm
2000000000 BTU20005 thm
5000000000 BTU50012 thm
10000000000 BTU100024 thm
20000000000 BTU200048 thm
50000000000 BTU500119 thm
100000000000 BTU1000239 thm
1000000000000 BTU10002388 thm
10000000000000 BTU100023877 thm
100000000000000 BTU1000238767 thm
1000000000000000 BTU10002387672 thm
10000000000000000 BTU100023876722 thm
100000000000000000 BTU1000238767221 thm

Real-world reference

An average US home furnace is rated 50,000–100,000 BTU/h. A window AC unit is typically 5,000–12,000 BTU/h.

Frequently asked questions

How many US therms are in 1 BTU?
1 BTU equals 1.0002 × 10^−5 US therms.
How do I convert BTU to US therms?
Multiply the BTU value by 1.0002 × 10^−5. So x BTU × 1.0002 × 10^−5 = the equivalent in thm.
What is 5 BTU in US therms?
5 BTU equals 5.0012 × 10^−5 US therms.
What is 10 BTU in US therms?
10 BTU equals 0.000100024 US therms.
What is 100 BTU in US therms?
100 BTU equals 0.00100024 US therms.
How do I convert back from US therms to BTU?
Multiply the US therm value by 99976.1. For example, 1 thm = 99976.1 BTU.
Is the BTU bigger than the US therm?
No. 1 BTU is smaller than 1 US therm. It takes 99976.1 BTU to equal 1 US therm.
Are these conversion factors exact?
The underlying imperial/US unit definitions are exact; the displayed factor (1.0002 × 10^−5) is rounded for readability, and the browser computes using IEEE 754 double-precision arithmetic.

About the BTU and the US therm

The BTU

The International Table BTU (British thermal unit) equals exactly 1,055.05585262 joules — the energy needed to raise 1 pound of water by 1 °F. It is the dominant unit in US HVAC and natural-gas billing. There is also a thermochemical BTU that differs by about 0.06% — we use the more common IT definition.

The US therm

The US therm equals exactly 100,000 BTU (IT), or 105,480,400 joules. It is the standard billing unit for residential natural-gas consumption in the United States.

Related converters

US therms to BTU
thm → BTU
Kilojoules to Joules
kJ → J
Kilojoules to Calories
kJ → cal
Kilojoules to Kilocalories
kJ → kcal
Kilojoules to Watt-hours
kJ → Wh
Kilojoules to Kilowatt-hours
kJ → kWh

Sources