diff -r 14a1f7bca79b -r 545d31130844 src/EditProductTab3.cpp
--- a/src/EditProductTab3.cpp	Sat Apr 30 20:36:30 2022 +0200
+++ b/src/EditProductTab3.cpp	Sun May 01 10:31:31 2022 +0200
@@ -262,6 +262,11 @@
     qDebug() << "  psugar" << psugar << "pcara" << pcara << "mvol" << mvol;
     qDebug() << "  sugarsf" << sugarsf << "sugarsm" << sugarsm;
 
+    double v = s / sugardensity + mvol;
+    s = 1000 * s / (v * 10); //deg. Plato
+    product->est_mash_sg = Utils::plato_to_sg(s);
+    ui->brew_mashsgShow->setValue(product->est_mash_sg);
+
     double og = Utils::estimate_sg(sugarsf + addedS, product->batch_size);
     qDebug() << "  OG" << ui->est_ogEdit->value() << og;
     product->est_og = og;