🏠
Carpet Calculator
Estimate carpet square footage, square yards, and total material cost including padding
🏠
Carpet Calculator
How to Calculate Carpet for a Room
Carpet is measured and sold in square yards, although most homeowners think in square feet. Measure your room dimensions carefully, add a 10% waste factor for seams and cuts, and convert to square yards by dividing by 9. For L-shaped rooms, break the space into two rectangles and sum the areas before adding waste.
Carpet Area Formulas
Area (sq ft) = Length × Width
Area with Waste = Area × 1.10 (10% waste)
Square Yards = Area with Waste ÷ 9
Total Cost = (Carpet $/sq ft + Padding $/sq ft) × Area with Waste
Area (sq ft) = Length × Width
Area with Waste = Area × 1.10 (10% waste)
Square Yards = Area with Waste ÷ 9
Total Cost = (Carpet $/sq ft + Padding $/sq ft) × Area with Waste
Carpet Style Cost & Durability Guide
| Style | Cost/Sq Ft | Durability | Best For |
|---|---|---|---|
| Plush | $3–6 | Medium | Bedrooms, low traffic |
| Berber | $2–5 | High | Living rooms, stairs |
| Frieze / Twist | $4–8 | Very High | High-traffic areas |
| Commercial | $1–3 | Very High | Offices, basements |
Carpet Buying Tips
- Always buy from the same dye lot — color can vary slightly between lots
- Request carpet samples and view them in your room lighting before ordering
- For stairs, add 1 sq ft per step (measure tread + riser + 2" tuck) for a standard 36"-wide staircase
- Seams should be placed away from doorways and high-traffic pathways where they're more visible
- Nylon is the most durable fiber; polyester offers the best value; wool is premium and natural
? Frequently Asked Questions
How do I calculate how much carpet I need?
Measure your room length and width in feet and multiply them to get square footage. For L-shaped rooms, split into two rectangles and add the areas. Add 10% for waste from seams and pattern matching. Divide by 9 to convert to square yards, which is the traditional unit carpet is sold in.
Why do I need to add waste for carpet?
Carpet comes in 12-foot wide rolls. Rooms wider than 12 feet require seams, and the pieces must be cut to align patterns. Doorways and closets also create off-cuts. A 10% waste factor is the industry standard for rectangular rooms; add 15% for L-shaped or irregular rooms.
Do I need carpet padding?
Yes — carpet padding (also called underlayment) is highly recommended. It extends carpet life by 50% by absorbing foot-traffic compression, provides insulation, reduces sound transmission between floors, and makes the carpet feel softer. Standard padding is 7/16" thick at 6–8 lb density.
What is the difference between Plush and Berber carpet?
Plush carpet has cut, upright fibers that create a smooth, velvety surface. It shows footprints and vacuum marks. Berber carpet has looped fibers and a flecked, textured appearance. Berber is more durable, hides dirt better, and is popular in high-traffic areas. Frieze (twist) carpet has tightly twisted fibers and is very durable.
How much does carpet installation cost?
Material costs range from $1–8/sq ft depending on style and quality. Carpet padding adds $0.50–1.50/sq ft. Professional installation adds $1–3/sq ft for labor. Moving furniture and removing old carpet may add $0.50–1/sq ft. A typical 200 sq ft bedroom runs $500–$1,500 fully installed.
Related Calculators
💡 Pro Tips
Always add 10% extra to material estimates to account for waste, cuts, and mistakes.