diff -r 18e5cfe5d126 -r 6c9ad1317f0a www/js/prod_edit.js
--- a/www/js/prod_edit.js	Fri Sep 13 20:48:35 2019 +0200
+++ b/www/js/prod_edit.js	Fri Sep 13 21:30:39 2019 +0200
@@ -5361,6 +5361,7 @@
     row['ramp_time'] = data.ramp_time;
     $('#mashGrid').jqxGrid('addrow', null, row);
    }
+   calcMash();
   }
  });
  $('#est_mashvol').jqxTooltip({ content: 'Het totale volume van het maishwater en de mout in de maish pan.' });
@@ -5432,11 +5433,13 @@
  $('#wstep_time').on('change', function(event) {
   var rowdata = $('#mashGrid').jqxGrid('getrowdata', mashRow);
   rowdata.step_time = parseFloat(event.args.value);
+  calcMash();
  });
  $('#wramp_time').jqxNumberInput(PosInt);
  $('#wramp_time').on('change', function(event) {
   var rowdata = $('#mashGrid').jqxGrid('getrowdata', mashRow);
   rowdata.ramp_time = parseFloat(event.args.value);
+  calcMash();
  });
  $('#wstep_infuse_amount').jqxNumberInput(Spin1dec);
  $('#wstep_infuse_amount').on('change', function(event) {
@@ -5462,6 +5465,7 @@
   calcFermentables();
   calcWater();
   calcSparge();
+  calcMash();
  });
 
  // Tab 8, Water