Joules to Therms (J to thm) Converter

How to convert joules to therms

Formulathm = J × 9.48043428×10⁻⁹

Because one therm equals 105,480,400 joules, you can also divide: thm = J ÷ 105,480,400.

A joule is smaller than a therm: it takes 105,480,400 joules to make one therm.

Worked examples

1 joule1 J × 9.48043428×10⁻⁹ = 9.48043428×10⁻⁹ thm
5 joules5 J × 9.48043428×10⁻⁹ = 4.74021714×10⁻⁸ thm
10 joules10 J × 9.48043428×10⁻⁹ = 9.48043428×10⁻⁸ thm
20 joules20 J × 9.48043428×10⁻⁹ = 1.896086856×10⁻⁷ thm
100 joules100 J × 9.48043428×10⁻⁹ = 9.48043428×10⁻⁷ thm

Joules to therms conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Joules to therms: 0.1–10 J
Joules (J)	Therms (thm)
0.1 J	9.4804343×10⁻¹⁰ thm
0.25 J	2.3701086×10⁻⁹ thm
0.5 J	4.7402171×10⁻⁹ thm
1 J	9.4804343×10⁻⁹ thm
2 J	1.8960869×10⁻⁸ thm
3 J	2.8441303×10⁻⁸ thm
4 J	3.7921737×10⁻⁸ thm
5 J	4.7402171×10⁻⁸ thm
6 J	5.6882606×10⁻⁸ thm
7 J	6.636304×10⁻⁸ thm
8 J	7.5843474×10⁻⁸ thm
9 J	8.5323909×10⁻⁸ thm
10 J	9.4804343×10⁻⁸ thm

Joules to therms: 12–1,000 J
Joules (J)	Therms (thm)
12 J	1.1376521×10⁻⁷ thm
15 J	1.4220651×10⁻⁷ thm
20 J	1.8960869×10⁻⁷ thm
25 J	2.3701086×10⁻⁷ thm
30 J	2.8441303×10⁻⁷ thm
40 J	3.7921737×10⁻⁷ thm
50 J	4.7402171×10⁻⁷ thm
75 J	7.1103257×10⁻⁷ thm
100 J	9.4804343×10⁻⁷ thm
250 J	0.0000023701086 thm
500 J	0.0000047402171 thm
1,000 J	0.0000094804343 thm

About the units

Joule (J)

The SI unit of energy: the work done by a force of one newton over one metre, or one watt for one second. Lifting an apple by one metre takes about 1 J.

Therm (thm)

The US therm is 105,480,400 J, about 100,000 BTU. US gas utilities bill by the therm.

Frequently asked questions

How many therms are in one joule?

There are 9.48043428×10⁻⁹ therms in one joule, and this value is exact by definition.

How do I convert joules to therms?

Multiply the number of joules by 9.48043428×10⁻⁹. For example, 10 J × 9.48043428×10⁻⁹ = 9.48043428×10⁻⁸ thm.

How many joules are in one therm?

One therm equals 105,480,400 joules. That is the reverse factor, 1 ÷ 9.48043428×10⁻⁹.

What is 10 joules in therms?

10 J = 9.48043428×10⁻⁸ thm.

Is this J to thm converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.

Joules to Therms Converter