# Turn up the thermostat or use electric space heater?

With the Polar Vortex descending upon us this week, I thought I would go through a little calculation to see which option makes more sense (and costs less dollars).

### How to compare Natural Gas to Electricity

To be able to properly compare natural gas to electricity, we need to figure out how to compare their cost. Each of the two energy sources are delivered and measured using different units. Natural gas delivered and billed in therms, electricity in kilowatt-hours (kWh). Luckily, someone has already gone to the trouble to calculate how many kWh are in a therm — 29.3072 (source: Wikipedia).

Using this conversion factor, we can compare the relative costs of the two energy sources:

 Energy source unit cost (Dec-18) cost per kWh cost per therm natural gas \$0.554/therm \$0.019/kWh \$0.554/therm electricity \$0.121/kWh \$0.121/kWh \$3.543/therm

For the purpose of turning energy sources into heat, it doesn’t take a rocket scientist to figure out that natural gas is a much cheaper form of energy than electricity. Natural gas is 6.4x cheaper than electricity.