Carpet Calculator – Roll Widths & Seams

A reliable carpet takeoff follows one rule: measure twice, order once. The calculator converts your room dimensions and roll width into dependable quantities using Roll Length = Room Length + 10 cm; Seams = Width ÷ Roll Width (rounded up), then adds the waste margin that experienced builders apply by default. Example: A 5 × 4.5 m room from 3.66 m roll: two 5.1 m cuts = 10.2 m of carpet with one seam at 0.84 m off the wall. Field tip: Run the pile direction the same way on every cut or seams glow under light. The result is broken down into purchasable units - bags, sheets, rolls or truck loads - so you can order the nearest whole unit without overbuying, and every figure traces back to the formula shown above.

1. 1

   Take dimensions

   Note the room dimensions and roll width for the area you are covering or filling.

2. 2

   Run the calculation

   The calculator applies Roll Length = Room Length + 10 cm; Seams = Width ÷ Roll Width (rounded up) the moment you type.

3. 3

   Check the breakdown

   Compare base quantity and waste-adjusted totals side by side.

4. 4

   Plan the purchase

   Use the final figure to price and schedule the delivery.

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• Forgetting underlayment

• Small remaining boxes left