Calculators
Heat pump savings calculator
Compare a heat pump's running cost against your current heating and see the indicative annual difference — including the honest near-neutral result for gas homes.
Heat pump savings
Figures verified July 2026
Indicative annual difference
£—
Current heating now
£—
With a heat pump
£—
The honest picture on savings
Switching from oil, LPG or direct electric heating usually cuts running costs — sometimes substantially. Switching from mains gas is different: because gas is cheap per unit, a heat pump's running cost is often roughly level with it, occasionally a little more. We show that result honestly rather than inflating it. If you're on gas, the real reasons to switch are the £7,500 grant, comfort and much lower carbon. Read the full heat pump vs gas comparison.
Get a tailored estimate and a fixed quote
These tools give indicative figures. For your real numbers and the grant applied, use the full calculator or call us.