Free tool · BuildMeA Projects
Kitchen Worktop Calculator
Enter each worktop run in metres and this works out your total linear length, how many standard worktop lengths you need to buy, and roughly how much offcut you'll be left with. Rough out the order before you're stood in the merchant arguing about lengths.
With a 10% waste allowance that's 0 m of worktop to cut from, bought as 0 × 3 m lengths (0 m total). Joins planned: 1.
Who this is for
Anyone pricing up or ordering a kitchen worktop — fitters, kitchen installers, and DIYers replacing worktops themselves. It gives you a quick materials estimate: how many standard lengths to order and roughly how much waste to expect, before you get a formal cutting list from the supplier.
Why does it add a waste allowance?
Every cut, mitred joint and out-of-square wall eats length you can't get back. A 10% allowance is a sensible starting point for a straightforward kitchen, but tighten it up or loosen it depending on how many joins and corners you've got, and how confident you are in your measurements.
Should I measure twice before ordering?
Yes — always. Walls are rarely perfectly square, and worktops are expensive to get wrong. Take your own site measurements right before ordering rather than relying on kitchen plan drawings, and get a second measurement from someone else where you can.
Is this a fitting quote?
No. This is a materials estimate only — how much worktop to buy — not a price for supply, cutting or fitting. Get an actual quote from your worktop supplier or fitter once you've got your final cutting list.
What counts as a worktop run?
A run is one continuous straight section of worktop before it turns a corner or meets another run at a joint. An L-shaped kitchen is usually two runs; a U-shaped kitchen is usually three. Measure each one separately and enter it above.
Please note: this tool gives a guide or estimate only. It may not be 100% accurate and is not professional advice — always check the figures before you rely on them. Everything you type stays in your browser — nothing is uploaded, saved or sent anywhere.
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