🧶Carpet Calculator PRO
Square yards, roll length, pad, tack strips, and cost — CRI planning.
Dimension Diagram — updates as you type
Dashed lines preview 12 ft roll seams. Area plus waste decides yardage; the perimeter decides tack strips.
1 Room Dimensions
2 Pricing & Labour
Results
Material Quantities
Room
Cost Breakdown
⚠️ Pre-Export Checklist
- Closets and alcoves included in dimensions
- Waste set for seams, angles, and stairs
- Pad specified (not skipped)
- Door clearances checked for new floor height
How to Estimate Carpet for a Room
Show formulas and worked example ▼
Formulas
Square yards= Length × Width ÷ 9
Order yards= Square yards × (1 + waste)
Roll feet= Order square feet ÷ 12 (12 ft roll width)
Tack strips= 2 × (Length + Width) minus doorways
Worked Example
12×12 ft room, 10% waste:144 sq ft = 16 sq yd → 17.6 order yards, 13.2 roll feet, ~48 ft tack strips.
Common Mistakes to Avoid
- Ordering exact yardage with no seam waste
- Skipping pad to save money
- Forgetting closets (dye-lot mismatch later)
- Doors that no longer clear the thicker floor
Drag to rotate — Scroll to zoom
Смежные калькуляторы
Frequently used together on the same project.
Client & Quote (prints on PDF & Excel)
Adjustments (applies to exports)
Contingency is added as a separate line on the exported cost summary. Waste % is printed as an advisory reminder.
Project notes (prints on PDF & Excel)
Result compare (A/B)
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Saved rates auto-apply from your Price Library. Advanced details stay in your browser — nothing is uploaded except inside your own PDF/Excel exports.
Carpet is sold by the square yard off 12-foot-wide rolls, which means room shape decides how much you buy almost as much as room size does. Our free carpet calculator converts your room dimensions into square yards with waste, linear feet of roll goods, padding, tack strips, and total cost — the same takeoff a flooring shop runs before cutting your order.
Enter the room length and width, set a waste percentage (10 percent for square rooms, 15 for rooms with angles, closets, or stairs), and price your carpet per square yard. Results include the roll length to order, pad yardage, tack-strip footage for the perimeter, and an itemized cost.
📖 Как пользоваться калькулятором
Step 1: Measure the Room
Measure length and width in feet at the longest points, including closets and alcoves you want carpeted.
Step 2: Set Waste
Use 10 percent for rectangular rooms, 15 percent for L-shapes, angles, or stairs where seams multiply.
Step 3: Price Materials
Enter carpet price per square yard, pad price, and tack strip price per linear foot.
Step 4: Review the Order
Results show square yards, roll linear feet, pad, tack strips, and total cost to give the flooring shop.
📐 Как считаются количества
Area in square feet divided by 9 gives square yards; multiply by 1 plus waste for the order quantity. Because carpet comes 12 feet wide, roll linear feet = waste-adjusted square feet ÷ 12. Padding matches the carpet yardage. Tack strips run the perimeter — 2 × (length + width) — minus door openings. A 12x12 room at 10 percent waste needs 17.6 square yards, about 13.2 linear feet of roll, and roughly 48 linear feet of tack strip.
⚠️ Типичные ошибки
Ordering exact square yards
✓ Seams, pattern match, and closet cuts consume 10 to 15 percent. Dye lots also vary — leftover from the same roll saves a mismatched patch later.
Forgetting the pad
✓ Pad is roughly a third of the comfort and half the lifespan. Budget it per square yard alongside the carpet.
Measuring wall to wall only
✓ Include closets, alcoves, and stair treads in the dimensions, or they become a second order from a different dye lot.
Ignoring door clearances
✓ New carpet plus pad raises the floor up to an inch. Check that doors still swing before installation day.
💡 Советы профи
Run the carpet pile direction the same way in every room for consistent color.
Seam rooms wider than 12 feet in low-traffic areas, never in doorways.
Upgrade the pad before upgrading the carpet — dense 8 lb pad transforms mid-grade carpet.
Acclimate carpet in the home for 24 hours before installation.
❓ Частые вопросы
144 sq ft is 16 square yards; with 10 percent waste order 17.6 yards, about 13.2 linear feet off a 12 ft roll, plus pad and 48 ft of tack strip.
Standard residential roll goods are 12 feet wide. Rooms wider than 12 feet need a seam, which is why waste rises on large rooms.
A 12x12 room at $25 per square yard runs about $440 for carpet plus $100 to $150 for pad, strips, and installation.
Yes — strips lose grip after one carpet lifecycle, and they cost pennies per foot compared to a re-stretch call-back.
🏗️ Реальные применения
Carpet estimates cover bedrooms, living rooms, basements, offices, and rental turnovers. Property managers carpeting identical units multiply one room takeoff across the building, while homeowners use the roll-length figure to confirm the shop is not over-ordering. Stairs are the wildcard — each tread and riser eats nearly a foot of roll width, so measure them separately.
Our free carpet calculator estimates square yards, 12-foot roll length, padding, tack strips, and total cost for any room. Use it for bedrooms, living rooms, basements, and offices with adjustable waste for seams and angles. Enter dimensions once for an instant flooring-shop-ready order.
✅Method, Sources & Review
Maintained by theBuildingCalc methods desk· Last reviewedSeptember 23, 2026. This calculator implements the standards and references below; every figure can be rechecked against the formulas and worked example on this page.
Results are estimates, not engineering advice. Verify against local codes and licensed professionals for structural, electrical, and gas work. See ourTerms. Spotted an error? Report it— corrections ship with the next review.