UnitConvConvert
Energy

Convert therms to kilowatt-hours

1 thm=29.3071kWh

Use the converter below to change any therms value into kilowatt-hours instantly — with formula, conversion table, and real-world examples.

29.30711

Conversion formula

Forward
kilowatt-hours = therms × 29.3071
Reverse
therms = kilowatt-hours × 0.03412

Example: 10 thm × 29.3071 = 293.071 kWh.

About both units

From

Therm

thm

The therm equals 100,000 BTU or 105.5 megajoules. Used in US and UK natural-gas billing. A typical UK home uses 200–500 therms per year for heating.

Real-world: UK home heating: 200–500 therms/year. 1 therm = about $1.50 US (2024) or £1.00 UK.
Read full therm reference →
To

Kilowatt-Hour

kWh

The kilowatt-hour equals 3.6 megajoules — energy delivered by 1 kW for 1 hour. It is the standard unit on electricity bills worldwide. A UK home uses about 2900 kWh/year; an EV charge adds 10–80 kWh depending on battery.

Real-world: UK home: ~2900 kWh/year. Tesla Model 3 battery: 60–80 kWh. Typical EV efficiency: 15–20 kWh/100 km.
Read full kilowatt-hour reference →

Therm to Kilowatt-Hour conversion table

Common therms to kilowatt-hours values for quick reference.

Therm (thm)Kilowatt-Hour (kWh)
1 thm29.3071 kWh
10 thm293.071 kWh
100 thm2,930.71 kWh
500 thm14,653.55 kWh
1,000 thm29,307.11 kWh
5,000 thm146,535.54 kWh
10,000 thm293,071.07 kWh
50,000 thm1,465,355.35 kWh
100,000 thm2,930,710.7 kWh
500,000 thm14,653,553.51 kWh

Tips & common mistakes

Quick tips

  • 1 therm = 100,000 BTU = 105.5 MJ = 29.3 kWh.
  • UK bills often quote both therms and kWh.
  • In metric-dominant EU, gas is billed in kWh or m³.

Avoid these

  • Comparing therms and kWh without conversion on a mixed-unit bill.
  • Assuming therms are used globally — only US and UK.
  • Using BTU when bill shows therms — factor of 100,000.

Frequently asked questions

How many kilowatt-hours in a therm?
One therm equals 29.3071 kilowatt-hours.
How do I convert therms to kilowatt-hours?
Multiply the therm value by 29.3071 to get the equivalent in kilowatt-hours.
What is 100 therms in kilowatt-hours?
100 therms equals 2,930.71 kilowatt-hours.
Is a therm bigger than a kilowatt-hour?
Yes. 1 therm equals 29.3071 kilowatt-hours, so one therm is larger.
How to convert therms to kilowatt-hours without a calculator?
Multiply by 29.31 for a quick estimate; use a calculator for precise results.

Related energy conversions

📊 See full comparison matrix →

More from Therm

thm → J
1 = 105,505,585.3 J
thm → kJ
1 = 105,505.59 kJ
thm → MJ
1 = 105.506 MJ
thm → Wh
1 = 29,307.11 Wh
thm → cal
1 = 25,216,440.08 cal
thm → kcal
1 = 25,216.44 kcal
thm → BTU
1 = 100,000 BTU
thm → eV
1 = 6.5851e26 eV

More to Kilowatt-Hour

J → kWh
1 = 2.7778e-7 kWh
kJ → kWh
1 = 0.0002778 kWh
MJ → kWh
1 = 0.2778 kWh
Wh → kWh
1 = 0.001 kWh
cal → kWh
1 = 1.1622e-6 kWh
kcal → kWh
1 = 0.001162 kWh
BTU → kWh
1 = 0.0002931 kWh
eV → kWh
1 = 4.4505e-26 kWh

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