Hammer CalculatorDrywall, Interior Finishes & Trim
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Calculate drywall sheets, joint compound, trim lengths, cabinets, and countertops for interior finishing. These tools help you avoid the frustrating mid-project supply run by nailing down quantities before the first sheet goes up.
Quick Tips
- Use 5/8" drywall on ceilings and anywhere fire rating is required — 1/2" sags on spans over 16" o.c.
- Estimate about 3.5 gallons of pre-mixed joint compound per 1,000 sq ft of drywall for a three-coat finish.
- Measure each wall separately for trim and add 10% for miter cuts and waste — corners eat more material than you expect.