Fitted Carpet Calculator

Work out how much fitted carpet you need based on your room area and standard roll widths — no guesswork, no waste.

How to Use This Calculator

Choose your unit — Square Meters or Square Feet.
Enter your room's length and width in that unit.
Select your carpet roll width — most carpets come in 3.66m, 4m, or 5m rolls, or enter a custom width.
Set a waste allowance to account for pattern matching, seams, and offcuts (15% is a safe default for most rooms).
Read your results instantly — total room area, carpet length needed, and total carpet area including waste.

Room Length (m)

Room Width (m)

Custom Roll Width (m)

Updates instantly as you adjust settings.

Total Room Area

20.0 m²

≈ 215.3 ft²

Area Needed (with waste)

23.0 m²

Carpet Length Needed

5.8 linear m

at 4 m roll width

Total in Square Yards

27.5 yd²

💡 For rooms wider than your carpet roll, extra seaming may be needed — a flooring installer can confirm exact seam placement.

Use your calculated measurements when ordering fitted carpet. Save or share your results below.