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Wet Plaster tonnage as delivered.
About 1.6 short tons per cubic yard for mixed gypsum plaster; the dry powder is considerably lighter.
Approximate volume
6.25 yd³
About 1.6 short tons per cubic yard for mixed gypsum plaster; the dry powder is considerably lighter. Light bulky materials fill a container by volume long before they reach its weight limit.
- Conversion factor applied
- 0.63 yd³ per short ton
They open the calculator with your figures already in it
Wet Plaster Tons to Cubic Yards Calculator: 6.25 yd³ — shown in imperial, US market. The link sets both, so the result they see is the one on your screen.
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How this was calculated
Formula source(s)
- Inverse of approximately 1.6 short tons per cubic yard
- 1 short ton = 2,000 lb; a metric tonne is about 10% heavier
Inputs used
- Wet Plaster weight (short tons)
- 10
Intermediate steps
- Conversion factor applied
- 0.63 yd³ per short ton
Confidence note: About 1.6 short tons per cubic yard for mixed gypsum plaster; the dry powder is considerably lighter. Light bulky materials fill a container by volume long before they reach its weight limit.
What this calculation does not cover
- A tonnage on a bagged delivery note is dry powder, and this conversion is for plaster already gauged. A delivered weight run through it comes out short of what that powder makes once mixed, and shorter still the slacker the gauge.
- Volume divided by area gives an even coat, and no background is even. Plaster fills the hollows before it builds depth, so a bowed or patched wall takes material into dubbing out and returns no thickness for it. The flatter the finish has to be, the more goes that way.
- Not all of it reaches the wall. Material stays in the bath and on the hawk, drops on the floor, and comes off again in flattening — none of which shows on the finished face. Coverage worked from a volume is the best case, not the working one.
Estimated cost — your price
This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.
Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.
Sources checked 2026-08-26 · in the site-wide review of 2026-09-06 · v1.0.0
Regulatory standards & verification citations2
- Inverse of approximately 1.6 short tons per cubic yard
- 1 short ton = 2,000 lb; a metric tonne is about 10% heavier
Cite this page
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Converting a plaster tonnage into volume is mostly a planning question for larger jobs. The binding constraint on plaster is never the quantity but the working time: once mixed it has a limited window before it goes off, and unlike mortar it cannot be retempered at all — gypsum that has begun to set is finished. That means plaster is mixed in batches sized to what can be applied, and a day's tonnage tells you about deliveries rather than about mixing.