# Carpet Calculator

Calculate how much carpet you need for any room. Get square footage, square yards, rolls needed, and a cost estimate for your carpet installation project.

## What this calculates

Planning to carpet a room? Enter the room dimensions and carpet roll width to find out how much material you need. The calculator provides square footage, square yardage (how carpet is typically priced), and an estimated cost range.

## Inputs

- **Room Length** (ft) — min 1, max 200 — Length of the room in feet
- **Room Width** (ft) — min 1, max 200 — Width of the room in feet
- **Carpet Roll Width** (ft) — min 6, max 15 — Standard carpet roll width (most common is 12 ft, also available in 13.5 and 15 ft)

## Outputs

- **Area (sq ft)** — Total floor area in square feet
- **Area (sq yd)** — Total floor area in square yards (carpet is priced per sq yd)
- **Rolls Needed** — Number of carpet rolls required
- **Estimated Cost Range** — formatted as text — Rough cost estimate at $3-8 per sq ft installed

## Details

Carpet is typically sold by the square yard or square foot, cut from rolls that are 12 feet wide (some manufacturers offer 13.5 or 15 foot widths). The number of strips you need depends on your room width divided by the roll width, and each strip must span the full room length.

Always order 10% extra to account for waste from cutting, seam matching, and pattern alignment. For patterned carpet, you may need 15-20% extra. Seams should be placed in low-traffic areas and away from direct light when possible for the best appearance.

Installation costs vary widely by region and carpet quality. Budget carpet runs $3-4 per square foot installed, mid-range $4-6, and premium $6-8+. This includes the carpet pad, which is essential for comfort and carpet longevity.

## Frequently Asked Questions

**Q: Why is carpet measured in square yards?**

A: The carpet industry traditionally prices and sells by the square yard. To convert square feet to square yards, divide by 9. A 120 sq ft room is about 13.3 sq yd.

**Q: How much extra carpet should I order?**

A: Order at least 10% extra for a solid-color carpet. For patterned carpet that requires pattern matching at seams, order 15-20% extra. Keep leftover carpet for future repairs.

**Q: What is a carpet pad and do I need one?**

A: A carpet pad (cushion) goes between the subfloor and carpet. It provides comfort, insulation, and extends carpet life by absorbing impact. Nearly all carpet installations require a pad. Standard pad thickness is 7/16 inch for residential use.

**Q: Can I install carpet myself?**

A: DIY carpet installation is possible with the right tools (knee kicker, carpet stretcher, seam tape). However, professional installation is recommended for rooms with multiple seams, stairs, or irregular shapes to ensure a proper stretch and clean seams.

**Q: How do I handle an L-shaped or irregular room?**

A: Break the room into rectangles, calculate each section separately, and add them together. Each section may need its own carpet strips, so factor in extra waste for the additional seams.

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Source: https://vastcalc.com/calculators/construction/carpet
Category: Construction
Last updated: 2026-04-21