What is the difference between all-purpose and lightweight compound?

All-purpose is heavier, stronger, and better for taping coats. Lightweight is easier to sand and better for final finish coats. Many pros use all-purpose for tape and lightweight for top coats.

Joint Compound Calculator

Calculate how many buckets of joint compound (mud) you need for your drywall finishing.

Ad — 728x90 — Leaderboard

Enter Your Measurements

Ad — 336x280 — Rectangle

How to Use This Calculator

1Enter number of drywall sheets.
2Click Calculate.

Ad — 728x90 — Mid-Page

About This Material

All-purpose joint compound (mud) is used for taping, topping, and finishing drywall. A 4.5-gallon bucket covers approximately 16 sheets over three coats.

Installation Tips

•Apply 3 coats: tape coat, second coat (thin out), finish coat.
•Sand between coats when fully dry.
•Use lightweight compound for final coat for easier sanding.

Common Mistakes to Avoid

Applying compound too thick — causes cracking.
Not waiting for full dry between coats.
Using setting-type compound for finish coat — too hard to sand.