What widths does carpet come in?

12 ft is standard in the US; some styles in 13.2 or 15 ft.

Do I need carpet pad?

Yes — it adds comfort, life and sound insulation.

Glue-down or stretched-in carpet?

Glue-down for commercial traffic; stretched-in over pad at home.

How do I clean carpet?

Vacuum often and hot-water extract once or twice a year.

Best carpet for a bedroom?

Cut pile or loop with a quality pad.

Carpet calculator

Room length and width and roll width: you get strips, linear length of roll, area to pay for, pad and perimeter tack strip.

Purchase quantity

219.584 ft²

Net measurement: 215.278 ft²

Linear metres of roll16.732 ft
Carpet to buy219.584 ft²
Carpet pad226.042 ft²
Tack strip or tape (perimeter)59.055 ft

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Calculate labour, margin & GST

How it's calculated (visible formula)

strips = ceil(width ÷ roll width); roll length = strips × (length + 4 in); area = roll length × roll width

Net geometric measurement, no waste.
Adjustable waste % for cuts and breakage.
Purchase rounded up to sellable units (boxes, bags, buckets, boards).

See methodology and formula versions

How to calculate it, step by step

Measure room length and width (to the middle of the doorway).
Choose the available roll width.
Work out strips and their length with 4 in extra.
Get linear feet and square yards to buy.
Add pad and tack strip.

Worked example: 16 × 13 ft room with 13 ft (4 m) roll

1 strip of 16.7 ft
16.7 × 13.1 ≈ 220 sq ft (24.4 yd²)

→ About 24.4 yd² of carpet and 25 yd² of pad.

Common mistakes

Estimating from floor area without roll width.
Seams in traffic paths or facing the window.
Not matching pile direction between strips.

Pro tips

Run the pile in the same direction on every strip.
Keep seams out of traffic paths.
Let carpet relax a few hours before cutting.
Power-stretch stretched-in carpet to avoid ripples.

From calculation to quote

Add labour, overhead and your margin, and generate the professional PDF.

Create quote Calculate margin & GST

FAQs

What widths does carpet come in?: 12 ft is standard in the US; some styles in 13.2 or 15 ft.
How many square feet in a square yard?: 9.
Do I need carpet pad?: Yes — it adds comfort, life and sound insulation.
Glue-down or stretched-in carpet?: Glue-down for commercial traffic; stretched-in over pad at home.
How do I clean carpet?: Vacuum often and hot-water extract once or twice a year.
Best carpet for a bedroom?: Cut pile or loop with a quality pad.

Sources and standards

Maintained by Srikanta M · Formula v1.0.0 · Verified 2026-09-10 · Updated 2026-09-10 · Limits: quantity estimation, not structural design or site supervision.