Heating

Thermostat Savings Calculator

Lowering your heating thermostat even slightly can noticeably cut your bill. This calculator estimates the yearly saving from a small setback.

Your details

$

The heating portion of your energy bills.

°
%

Rule of thumb: ~3% of heating cost per 1°C.

Results

Estimated yearly saving
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Saving over 10 years
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Last updated June 30, 2026. Results update automatically as you type.

How it works

Yearly saving = annual heating cost × (degrees lowered × saving per degree ÷ 100). The “saving per degree” rule of thumb is roughly 3% per 1°C (about 1% per 1°F over an 8-hour setback). Real savings depend on your home, climate and how long the lower temperature is held.

Frequently asked questions

How many degrees should I turn it down?

Even 1–2 degrees makes a noticeable difference. A programmable or smart thermostat that lowers the temperature while you sleep or are out captures most of the saving automatically.

Does turning heating off when out save money?

Generally yes. Letting a home cool while empty and reheating it uses less energy than holding a constant temperature, despite a common myth to the contrary.

Is the 3% rule exact?

No — it is a widely used approximation. Adjust the “saving per degree” field to be more or less conservative for your situation.

These calculators provide general estimates for educational purposes only and are not financial advice. Real-world results depend on factors not captured here. Verify figures independently before making any purchase or financial decision.

Recommended gear

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