Carpet Calculator
Calculate carpet calculator by square feet and yards. Precise material estimations for building contractors and DIY home builders across USA/UK/Canada.
Calculate Carpet Calculator
Enter project dimensions below to compute required material quantities.
Calculation Results
Calculated using verified construction formula: Square Yards = (Room Length (ft) * Room Width (ft) * (1 + Waste Margin Pct)) / 9
Quick Summary
The Carpet Calculator converts room dimensions into square yards and square feet, calculating carpet roll cuts, cushion pad rolls, tackless gripper strips, and material costs for wall-to-wall carpet projects.
- Square Yards & Feet Unit Conversion: Computes broadloom carpet in both square yards (yd²) and square feet (sq ft).
- Cushion Pad & Tack Strip Scoping: Itemizes 30 sq yd carpet pad rolls and perimeter tack strip feet.
- Seam & Pattern Waste: Includes 10% safety margin for roll drop cuts.
How to Use the Carpet Calculator
- Enter Room Length in feet.
- Enter Room Width in feet.
- Select Carpet Roll Width (12-foot standard).
- Adjust the Seam & Waste Margin (%) (10% standard).
- Click Calculate to view square yards, square feet, pad rolls, tack strips, and material cost.
Carpet Calculator Formula & Method
This tool utilizes verified construction geometric formulas to compute material requirements:
Total Area with Waste (sq ft) = Net Area * (1 + Waste Margin / 100)
Square Yards (yd²) = Total Area (sq ft) / 9
Where:
- Square Yard (yd²): Standard industry unit for purchasing broadloom carpet (1 sq yd = 9 sq ft).
- Carpet Pad: Polyurethane foam cushion roll (7/16 in thickness standard).
- Tackless Strip: Wooden strip with angled steel pins nailed along wall perimeters to stretch carpet.
Worked Example
Example: 20ft * 15ft Master Bedroom (300 sq ft) with 10% Waste
- Net Room Area: 20 ft * 15 ft = 300 sq ft
- Total Area with 10% Waste: 300 * 1.10 = 330 sq ft
- Square Yards Needed: 330 / 9 = 36.67 Sq Yds
Applying the formula yields:
Total Carpet Needed: 36.67 Square Yards (330 Sq Ft)
Carpet Cushion Pad Rolls: 330 / 270 = 2 Rolls
Estimated Carpet Cost: 36.67 sq yds * .80 = ,056.00
What This Calculator Includes vs. Does Not Include
What This Calculator Includes
- Broadloom Wall-to-Wall Carpet Scoping: Measures plush, berber, pattern loop, and frieze carpets.
- Underlayment Cushion & Tack Strip Scoping: Itemizes carpet padding rolls and perimeter gripper hardware.
What This Calculator Does Not Include
- Carpet Power Stretcher Equipment Rental: Power stretcher tool rental.
Tips & Best Practices
- Keep Carpet Pile Direction Running the Same Way Across Seams: All carpet seams in adjacent rooms must have the pile face tufts slanting in the same direction to prevent visible color shading differences.
- Use 7/16-Inch 8lb Rebond Cushion Pad for Living Rooms: Dense 8lb rebond padding prolongs carpet life and prevents matting in high traffic paths.
Common Mistakes to Avoid
- Measuring Carpet in Square Feet Only: Carpet suppliers sell broadloom in 12-foot wide rolls by square yardage; ordering exact square footage without accounting for 12-ft roll cuts leaves rooms short.
Frequently Asked Questions (FAQ)
How many square yards of carpet do I need for a 20x15 room?
A 20x15 room is 300 sq ft. With 10% waste (330 sq ft), you need 36.67 square yards of carpet.
How do you convert square feet to square yards for carpet?
Divide total square feet by 9. For example, 300 sq ft / 9 = 33.33 square yards.
What is the standard width of a carpet roll?
Standard broadloom carpet rolls are 12 feet wide (144 inches); some commercial carpets come in 15-foot roll widths.
How much does wall-to-wall carpet cost per square yard?
Installed carpet costs between and per square yard (.20 to .00 per square foot).
How many square feet in a roll of carpet padding?
A standard roll of carpet cushion pad covers 30 square yards (270 square feet).
What density carpet pad is best?
An 8lb density 7/16-inch rebond foam pad is recommended for residential plush carpets.
How far from the wall should tack strips be installed?
Install tack strips approximately 1/4 inch to 3/8 inch away from the wall perimeter.
How heavy is a roll of carpet?
A full 12x100 foot broadloom carpet roll weighs between 350 and 500 lbs.
Is this carpet calculator free to use?
Yes, TibCal's Carpet Calculator is 100% free.