Free heat pump running cost calculator with plain-English guides to efficiency, sizing and electricity tariffs. UK-focused, independent.https://heatpumpmath.co.uk/en-GBhttps://heatpumpmath.co.uk/https://heatpumpmath.co.uk/Free UK heat pump running cost calculator. Enter your home details to estimate annual electricity costs based on SCOP, tariff and consumption.Mon, 18 May 2026 00:00:00 GMThttps://heatpumpmath.co.uk/what-is-scop/https://heatpumpmath.co.uk/what-is-scop/SCOP (Seasonal Coefficient of Performance) measures how efficiently a heat pump converts electricity into heat across a full UK heating season.Tue, 12 May 2026 00:00:00 GMThttps://heatpumpmath.co.uk/heat-pump-electricity-tariffs/https://heatpumpmath.co.uk/heat-pump-electricity-tariffs/Comparison of UK electricity tariffs designed for heat pumps, including Octopus Cosy and Economy 7, with Jul 2026 Ofgem price cap rates.Tue, 12 May 2026 00:00:00 GMThttps://heatpumpmath.co.uk/heat-pump-vs-gas-boiler-cost/https://heatpumpmath.co.uk/heat-pump-vs-gas-boiler-cost/Direct comparison of annual running costs for air source heat pumps vs gas boilers in UK homes, based on the Jul 2026 Ofgem price cap.Tue, 12 May 2026 00:00:00 GMThttps://heatpumpmath.co.uk/heat-pump-sizing/https://heatpumpmath.co.uk/heat-pump-sizing/Guide to calculating the correct heat pump size (kW output) for UK homes. Oversizing wastes money and reduces efficiency.Tue, 12 May 2026 00:00:00 GMThttps://heatpumpmath.co.uk/factors-affecting-heat-pump-cost/https://heatpumpmath.co.uk/factors-affecting-heat-pump-cost/The biggest variables that determine how much you'll pay to run an air source heat pump in the UK, from flow temperature to thermostat habits.Tue, 12 May 2026 00:00:00 GMThttps://heatpumpmath.co.uk/guides/https://heatpumpmath.co.uk/guides/Plain-English guides to heat pump efficiency, tariffs, sizing, and running costs in the UK.Mon, 18 May 2026 00:00:00 GMT