Free UK tools
Energy Saving Calculators
Free, no-signup tools that turn your electricity rate into real pound figures — so you can decide what's worth buying and what's worth switching off.
Standby Power Cost Calculator
Add up every always-on device in your home and see what the phantom load costs you per year in pounds, at your own electricity rate.
Smart Plug Breakeven Calculator
Is a smart plug worth buying for a given device? Enter its standby draw and the plug price to see exactly how many months until payback.
Smart Thermostat Savings Calculator
How much would a Nest, Hive or tado° really cut off your heating bill? Pick the changes you'd actually make and see the payback in years.
LED Bulb Savings Calculator
Count your halogens, CFLs and old incandescents and see what a full LED swap saves per year — and how many months until the bulbs pay for themselves.
Security Camera Storage Calculator
How many days of footage does a microSD card actually hold at 1080p, 2K or 4K — and is a cloud subscription worth the yearly cost?
Solar Panel Payback Estimator
Enter your real quote and electricity rate to see yearly savings, SEG export income and the honest payback period in years.