About this site

Who runs it

I'm Akshay Thakur. I build and maintain every calculator on Roughly Built. There is no editorial team and no affiliate desk rewriting manufacturer numbers into a softer answer. If a constant is wrong, that is on me — and the contact page is how you reach me.

I am not selling bags of concrete or a subscription. The site exists so someone standing in a yard or a jobsite aisle can get a quantity, see the arithmetic, and check it against a published source instead of trusting a black-box total.

Why it exists

Most “how many bags / sheets / boards” tools online share the same habits: they hide the working, they never show where a coverage rate came from, and they treat a trade rule of thumb as if it were printed on a data sheet. When an estimate is short, you find out at the store — or worse, halfway through a pour.

I started Roughly Built to reverse that. Every tool on this domain is meant to be checkable: intermediate steps on the page, physical constants pulled from manufacturer sheets or codes where they exist, and an honest label when a number is only a convention. If a value cannot be defended, it does not get silently invented to fill a field.

How the numbers are checked

Coverage rates, bag yields, board widths, and similar constants live in a data layer with the source document, URL, and a verified-on date. Calculator pages render those sources in plain sight. The full hierarchy — what counts as a source, when we downgrade a figure to a labeled convention, and how corrections work — is on the methodology page.

Questions and corrections: akshaymarx08@gmail.com.