This multi-room carpet calculator adds every room, applies a 10% waste factor per room and returns one installed total for carpet, padding and labor.
Enter your room size below to estimate carpet, padding and professional installation cost. The worked example beneath the form is produced by the same calculation the tool runs.
Inputs: Two bedrooms — 12 × 12 ft plus 10 × 12 ft (264 sq ft total). Rooms are summed first, then the waste factor is applied to the total.
Total estimated cost: $1,269 – $2,039 (typical mid-point $1,654). Labor and disposal use the Midwest rate; enter a ZIP code in the tool to switch regions. You can download this breakdown as a PDF from the live tool.
| Step | Amount |
|---|---|
| 1. Raw floor area | 264 sq ft (29.3 sq yd) |
| 2. Add 10% waste factor | 291 sq ft ordered |
| 3. Carpet material | $871 – $1,452 |
| 4. Padding | $189 – $247 |
| 5. Installation labor | $209 – $340 |
Add the square footage of each room (length × width), add 10% for waste and seams, then multiply by your all-in $/sq ft tier ($3.50 budget, $5.50 standard, $9.00 premium).
Yes — ordering all rooms in one job ensures dye-lot match across the home and saves on trip fees ($75-$150 per visit).
Measure the largest rectangular footprint, then add the closet/alcove dimensions separately. Round each room up to the nearest foot before adding 10% waste.
Yes — but use the same brand/line in connecting rooms to keep transitions clean. Bedrooms can use lower-grade carpet than family rooms and hallways.
4 standard 12x12 bedrooms = 576 sq ft + 10% waste = ~634 sq ft. At $5.50/sq ft installed (standard tier), that's $2,880-$3,490 total.