Carpet Area Calculator
Instantly calculate the exact amount of carpet needed for your room. Free, accurate tool for square footage, square yards, and roll estimation with waste allowance.
Calculate Your Material Needs
Enter your room dimensions, preferred roll width, and waste allowance to get an instant, personalised evaluation of the carpet material required for your project.
Room Details
Enter your room measurements in feet (ft) to calculate area
Material Evaluation
Calculated area, square yards, and linear footage
Carpet Roll Standards
Common carpet roll dimensions and measurement tips to help you plan your flooring project accurately.
| Roll Specification | Width (Feet) | Width (Metres) | Best For |
|---|---|---|---|
| Standard Roll | 12 ft | ~3.66 m | Most residential bedrooms and living rooms |
| Intermediate Roll | 13 ft 6 in | ~4.11 m | Wider rooms, reducing the need for seams |
| Wide Roll | 15 ft | ~4.57 m | Large open-plan areas and commercial spaces |
Carpet Measurement FAQ
Everything you need to know about measuring rooms, calculating waste, and ordering carpet.
It is standard practice to add 10% to 15% extra material for waste. This accounts for cutting, seaming, pattern matching, and irregular room shapes. For simple rectangular rooms, 10% is usually sufficient. For complex layouts or patterned carpets, 15% to 20% is recommended.
In the UK and US, the most common standard carpet roll widths are 12 feet (approx. 3.66 metres) and 15 feet (approx. 4.57 metres). Some specialty carpets may come in 13’6″ widths. Always confirm the exact roll width with your supplier before finalising your order.
Since carpet is often priced and sold by the square yard, you can convert square feet to square yards by dividing the total square footage by 9. For example, a 180 sq ft room requires 20 square yards of carpet (before adding waste allowance).
Divide the L-shaped room into two separate rectangular sections. Measure the length and width of each rectangle individually, calculate the square footage for both, and then add them together. Finally, apply your waste percentage to the combined total.