USG Plaster Slide Rule
Plaster Calculator Update: 1) Specify units in inches or centimeters, 2) Added @nbivins formula (via @jeffcampana's). More ideas for improvements? Let me know in the comments!
https://plaster.glazy.org/
Pictured here: The original "gypsum cement & plaster VOLUME and MIX calculator" from USG with awesome 80's graphic design. (Courtesy @earlyamericanrobotpottery)
