You can’t cut what you can’t see. Start with the free data from your smart meter, then add detail only where it helps: a plug-in meter for one appliance, or a circuit-level monitor for heat pumps and EV chargers. We also cover time-of-use tariffs that reward shifting your usage.
Calculators for this topic
- Appliance Running Cost Calculator (Standby Included)Work out what any appliance costs to run per hour, day and year from its watts, hours of use and standby power, in your…Open calculator →
- Smart Thermostat Savings CalculatorEstimate what a smart thermostat could save on your heating and cooling bill and how quickly it pays back, using ENERGY STAR field data.Open calculator →
Every figure in these guides links to its source and shows when we last checked it. Read how we research, or tell us if something has changed.
