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Calculators

Use the formula: Length × Width × (Thickness in inches ÷ 12) ÷ 27. For a 20×20 ft slab at 4 inches thick: 20 × 20 × (4÷12) ÷ 27 = 4.9 cubic yards. Always order 10% extra for waste. Use the Concrete Calculator for an instant result.

A standard 12×12 ft room with 9 ft ceilings needs approximately 2 gallons for 2 coats (walls only). One gallon covers about 400 sq ft. Use the Paint Calculator for an exact estimate that accounts for your doors and windows.

For 12×12" tiles with 3/16" joints, a 10 lb bag of sanded grout covers approximately 60–80 sq ft. Smaller tiles or wider joints use significantly more grout. Use the Grout Calculator to get an exact bag count based on your tile size, joint width, and area — it also gives you a cost estimate by location.

Measure your attic's length × width to get square footage. The DOE recommends R-49 to R-60 for most US attics. With blown-in cellulose at R-3.5/inch, you'd need about 14 inches of insulation to reach R-49. Use the Insulation Calculator for a full cost estimate.

A standard pallet of sod covers 450 sq ft. Divide your lawn area by 450 and round up to get the number of pallets. For a 2,000 sq ft lawn: 2,000 ÷ 450 = 4.4 → order 5 pallets. Use the Sod Calculator for an instant estimate with 5% waste included.