Carpet Calculator and Price Estimator
Find how many square yards of carpet and pad your rooms and stairs need, with the cost.
Change the values and press Calculate to work out your own figures.
Add a row for each room; add stairs if you're carpeting them.
Show the working
- square yards = (rooms + stairs) × (1 + waste %) ÷ 9
How to use it
Add a row for each room; add stairs if you're carpeting them.
Lengths can be decimals, fractions or tape entries such as 12' 6 1/2" (in feet or inches). Prices are optional.
Key facts
square yards = Σ rooms (+ steps × width × (tread + riser)) × (1 + waste %) ÷ 9
Rolls
Carpet comes in 12 ft wide rolls (some 13 ft 6 in or 15 ft); seams and pattern matching can add more than 10%.
Questions
How much carpet for a 12 × 15 ft room?
22 square yards with 10% waste.
Formulas
square yards = Σ rooms (+ steps × width × (tread + riser)) × (1 + waste %) ÷ 9
Sources
Limitations
- Material densities are typical values (the midpoint of the commonly published range); real loads vary with moisture, grading and compaction, so check with your supplier or type in their density.
- Tank results are the geometric volume; real tanks have wall thickness and fittings.