A 16 ft by 13 ft bedroom needs 52 square yards of carpet roll: 46.0 sq yd from the cut schedule plus a 12% planning allowance, rounded up to a whole order. This page works the full example line by line, then runs three independent checks on the result.
What does the example room need?
The room is a rectangular bedroom. The 16 ft side runs in the carpet direction. The seller stocks a 12 ft roll. The carpet has an 18 in pattern repeat, and every cut keeps the same pile direction, which the measuring guide records from the CRI installation standard.
| Fact | Value |
|---|---|
| Room length (carpet direction) | 16 ft |
| Room width (across the roll) | 13 ft |
| Roll width | 12 ft |
| Trimming allowance per cut | 6 in (0.5 ft) |
| Pattern repeat | 18 in (1.5 ft) |
| Planning allowance | 12% (patterned, small repeat) |
How do you build the cut schedule?
The room is 1 ft wider than the roll, so it needs 2 cuts. Each matching cut after the first shifts up to one full pattern repeat so the pattern aligns at the seam.
cuts = ceil(room width / roll width) = ceil(13 / 12) = 2
cut length = room length + trim (+ one repeat on matching cuts)
Cut 1: 16 + 0.5 = 16.5 ft. The first cut needs no repeat shift.
Cut 2: 16 + 0.5 + 1.5 = 18.0 ft. The matching cut gets up to one full 18 in repeat so the pattern meets at the seam.
Add the cuts: 16.5 + 18.0 = 34.5 linear ft. Convert to the seller's unit.
square yards = linear ft x roll width / 9 = 34.5 x 12 / 9 = 46.0 sq yd
The net room area is 16 x 13 / 9 = 23.11 sq yd. Without the pattern the schedule would be 2 x 16.5 x 12 / 9 = 44.0 sq yd, so the repeat adds exactly 2.0 sq yd. An area-only order would be about 23 sq yd short before any allowance.
How does the cut schedule become an order?
Apply the planning allowance to the cut-schedule quantity, not to the net area. A 12% allowance fits the 10 to 15% range the ordering guide gives for patterned carpet with a small repeat.
order = 46.0 x 1.12 = 51.52 sq yd
Round the reported total only: order 52 sq yd. Rounding the lines first would hide square yards from the order.
How do you verify the order?
Three independent checks confirm the total. Run at least one before ordering.
Check 1: cross-check the net area with the calculator
Run the room through the Flooring Calculator: 16 x 13 = 208 sq ft, and 208 / 9 = 23.11 sq yd. The net line matches, and any order at or below 23.11 sq yd cannot cover this room.
Check 2: isolate the pattern-repeat cost
Subtract the no-pattern schedule from the patterned schedule: 46.0 - 44.0 = 2.0 sq yd. The repeat shift is one cut times the repeat: 1.5 x 12 / 9 = 18 / 9 = 2.0 sq yd. The two figures agree. A mismatch means the repeat landed on the wrong cut.
Check 3: confirm the width coverage
Two cuts give 2 x 12 = 24 ft of roll width over a 13 ft room. The second cut covers only 1 ft of the room and leaves an 11 ft offcut. That offcut is why the cut-schedule quantity (46 sq yd) is about double the net area (23.11 sq yd). An area-only order of 23.11 sq yd is 208 sq ft, or 17.33 linear ft of a 12 ft roll: shorter than even one full 18.0 ft cut. The room cannot be covered from net area alone.
Sources and scope
- Carpet and Rug Institute, Carpet Installation Standard 2011, section 6.5 (accessed 2026-10-21): requires the same pile direction on adjacent pieces of the same broadloom carpet; section 6.6 sends pattern matching to the manufacturer.
- Commercial Flooring Estimating LLC, "Carpet Roll Width & Seam Planning: 12' vs 13'6" vs 15'" (commercialflooringestimating.com, updated 2026-10-19, accessed 2026-10-21): supports the 12, 13.5, and 15 ft roll widths and the pattern-repeat waste effect.
- Engineer Fix, "How Much Extra Carpet Should You Order?" (engineerfix.com, accessed 2026-10-21): supports the 5-10% baseline allowance, the 10-15% patterned small-repeat range, the repeat shift per matching cut, and the dye-lot risk on short orders.
- Flooring Canada, "Top Carpet FAQs" (accessed 2026-10-21): supports typical 12 ft rolls and ordering at least 10% above the room area.
- NIST Handbook 44, 2026 Appendix C: the 9 sq ft per sq yd relationship used in the examples.
Scope: this page demonstrates the cut-schedule method on an author's own worked example. The room dimensions, trimming allowance, pattern repeat, and 12% allowance are stated planning fixtures inside published ranges, not product specifications. The governing product documents, seller record, installer guidance, and responsible qualified people control the accepted seam layout, allowance, and final order quantity. It does not select a product or lay out the installation.
Review responsibility: Saleem Sial owns the published calculation, source, and editorial checks. Waseem Sial, External Reviewer and Engineer, remains listed for ongoing external review; no completed external-review date is claimed.
Next, use the measuring guide to build the cut schedule for your own room, the ordering guide to set the allowance range for your carpet and layout, or return to the Flooring hub.
