About DIY Calculators
Free calculators for DIY, building and garden jobs, and for converting measurements, showing every step of the sum.
Who we are
DIY Calculators is published by Youell Systems Ltd and edited by Max Youell. It went live on 14 November 2026. It is part of the same family as Energy Calculators and Work Calculators.
We build calculators that answer one question each, properly. Conversions use the units' legal definitions, building regulation figures come from GOV.UK, and everything else is worked out from the sizes you give. Every result has a "Show the workings" button so you can check the sum yourself.
What we are not
We are not builders, surveyors, architects or building control. Our calculators give information, not advice, and they work from what you enter. For structural work, or anything that needs building regulations approval, speak to your building control body or a qualified professional. We do not sell your details and there is nothing to sign up to.
Get in touch
Email max@youellsystems.co.uk. Tell us if you spot a mistake: we fix errors as soon as we can and list them on how we work.
Company details
Youell Systems Ltd is registered in England and Wales, company number 17464004.
Registered office: 18 Albert Road, Clayton West, Huddersfield HD8 9NL.