Free Tools
Free tools for the trade
Free calculators for the trade — no signup, no email, no catch. They run entirely in your browser, and nothing you type is saved or sent anywhere.
Each one is a genuine slice of the arithmetic inside GDL’s products — the same rules, the same rounding the paid tools use.
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Stud wall calculator
How many lengths of timber to buy for a stud wall — studs, noggings and plates, packed against your own stock length, with the wall area alongside.
Open the calculator → From MarkMetric -
Roof calculator
Correct a plan footprint to the true sloped area from the pitch, then count slate, battens and felt against your own coverage figures.
Open the calculator → From MarkMetric
Each tool does one thing well — one wall, one roof, one calculation. They don’t measure your drawing or price your job; that’s what GDL’s products are for, taking the whole take-off off the PDF and out to a priced bill.