Home & Energy Calculators

Calculate the BTU requirement for heating a room and choose the right radiator size.

Estimate your monthly and annual energy costs based on your electricity and gas usage.

Calculate the running cost of any electrical appliance based on wattage and your electricity tariff.

Calculate potential savings from installing solar panels on your UK home.

Calculate potential savings from insulating your home including loft, cavity wall, and floor.

Calculate the right boiler size for your home based on radiators and bathrooms.

Calculate the BTU output needed for radiators in each room of your home.

Estimate your UK water bill. Compare metered and unmetered charges.

Estimate the cost of replacing windows and potential energy savings.

Estimate ROI, payback period, and savings from installing solar panels.

Estimate your annual gas bill based on usage and current tariffs.

Calculate the running cost of any electrical appliance.

Calculate the BTU rating needed to heat or cool a room effectively.

Calculate how much insulation you need and potential energy savings.

Calculate when your solar panels and battery storage will pay for themselves.