Carpet · 20×20 room
How much carpet do I need for a 20×20 room?
58 SY (517 SF)
A 20×20 room is 400 square feet. You need about 58 SY (517 SF) of carpet. That uses standard defaults (roll width 12 ft, waste 5%); adjust them below.
Full material list for a 20×20 room
- Carpet to order
- 58 SY (517 SF)
- Room area
- 400 SF (44.4 SY)
- Pad
- 45 SY
- Tack strip
- 80 LF
- Seams
- 1 seam
By roll width
| Roll width | Carpet to order |
|---|---|
| 12 ft roll | 58 SY (517 SF) |
| 15 ft roll | 72 SY (646 SF) |
Adjust for your room
Inputs
Estimated materials
- Carpet to order
- 58 SY (517 SF)
- Room area
- 400 SF (44.4 SY)
- Pad
- 45 SY
- Tack strip
- 80 LF
- Seams
- 1 seam
Carpet comes off a fixed-width roll, so you pay for the full roll width on every drop. Rooms wider than the roll need a seam. Doesn't account for pattern match or closets. Estimate — verify before ordering.
Frequently asked
- How many square feet is a 20×20 room?
- 20 ft × 20 ft = 400 square feet of floor area.
- How much carpet do I need for a 20×20 room?
- A 20×20 room is 400 square feet. You need about 58 SY (517 SF) of carpet.
- How do you calculate carpet for a room?
- Carpet is sold off 12 ft (sometimes 15 ft) rolls, so you buy roll width × length of each drop. Add a few inches of trim at each end and convert square feet to square yards by dividing by 9.
- Why do I need more carpet than my room's square footage?
- A room that isn't a multiple of the roll width leaves an offcut you still pay for. A 13 ft wide room needs two 12 ft drops or a 15 ft roll.
Other materials for a 20×20 room
Doing more than one room?
TrueTakeoff turns a whole estimate or plan set into a trade-organized material buyout — every room summed, every quantity traced. AI measures, professionals verify.