Appliances, HVAC & Energy Calculators

Free calculators for appliances, heating and energy, running costs, sizes and savings.

Repair or replace? A clear verdict from the costs.

Running cost of any appliance, per hour, month or year.

The right air-conditioner size for your room.

Panels, system size, cost and payback for 2026.

The tank size and first-hour rating your home needs.

What electric, heat pump and gas heating cost to run.

Savings from switching your bulbs to LED, with payback.

What your fridge costs per day, month and year.