Guides and explanations
Know the numbers. Make your own call.
Plain-English guides showing the assumptions and calculations behind our tools.
FREE GUIDE
How to calculate the running cost of any electrical appliance
A plain-English guide to watts, kWh and why your real electricity rate matters.
FREE GUIDEHow to estimate the cost of standby electricity
Small continuous loads can add up over a whole year. Here's the arithmetic.
FREE GUIDEA simple way to plan an emergency fund
Choose a target you understand, and work out a realistic gap without relying on forecasts.
FREE GUIDEUK mpg explained: turning mileage into fuel cost
Why UK imperial gallons matter when estimating petrol or diesel use.
FREE GUIDEMake a 52-week savings challenge work for your budget
The classic £1-increase challenge can be adapted to make it less demanding.