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Joint compound

Estimate joint tape and compound from the number of drywall sheets and coats.

Built and maintained by The NumberPrism Editorial TeamEditorial policy

Your details

Number of 4 × 8 sheets

Finishing coats

Tape roll length

Waste allowance (%)

Results update as you type. The formula and assumptions are explained below the calculator.

Joint compound needed

4.4 gal

Drywall area768 sq ft

Joint tape length336 ft

Tape rolls2 × 250 ft

4.5 gal compound tubs1 tubs

Assumes about 14 ft of seam per 4 × 8 sheet and standard taping, filling and finishing. Corner bead, repairs and texture are additional.

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What does this tool do?

Joint tape and compound are driven by the length of the seams rather than the board area. This calculator approximates seam length from standard 4 × 8 sheets, counts tape rolls and converts compound to ready-mix tubs.

The Formula

Tape (ft) = Sheets × 14; Compound (gal) = Tape × 0.004 × Coats × 1.10

Frequently Asked Questions

How much tape comes with a sheet of drywall?

Plan on about 14 linear ft of tape per 4 × 8 sheet when joints are shared with neighbouring sheets.

How many coats should I apply?

Three coats — tape, fill and finish — are standard for a level 4 finish; two may be enough for a utility space.

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