DIY Home Calculators is a small independent site that publishes calculators and plain-language guides on household energy costs in Europe. It covers heat pumps and gas boilers, electric cars, solar panels, appliances and the bills that tie them together.
Who runs the site
DIY Home Calculators is published by Mudassar Hussnain, a software developer based in Lahore, Pakistan. I am not an energy engineer, an electrician or a financial adviser, and the site does not pretend otherwise. I build the calculators and write the guides, and I show every formula so that you can check the work instead of trusting me.
You can write to me at mudassar@hevizonetech.com. Corrections are welcome, and I log them on the editorial policy page.
Why the site exists
Most online energy calculators ask for your email, push a product or hide their assumptions. Many are written for one country and quietly use prices that do not match yours. I wanted calculators that work with any currency, that let you change every price, and that explain what they are doing.
Prices and grants change faster than a website can follow, so none of them are fixed. You enter your own numbers, and the pages explain where to find them on your bills.
What you will find here
- Eight calculators for heat pumps, EV charging, EV running costs, solar payback, appliance costs, gas conversion, LED lighting and electricity bills.
- Guides with worked examples that you can reproduce, since the figures come from the same code that runs the calculators.
- A method page that lists the formulas and assumptions behind every tool.
How the site is funded
The site shows advertising from Google AdSense. Ads do not affect the results of any calculator, and no manufacturer, installer or supplier pays for a place in a comparison. Where a page links to a source, the link is there because it supports a statement, not because of a commercial arrangement.
Your privacy
The calculators run in your browser. The numbers you type are not sent to a server and are not stored. The privacy policy explains what is collected by the site and its advertising partner.
A note on accuracy
Every result is an estimate for planning. Real bills depend on tariffs, weather, installation quality and your habits. Read the disclaimer before making a large purchase, and ask a qualified installer or adviser for a quote that fits your home.