How to Use the Non-Shrink Grout Volume Calculator
Non-shrink grout is used under machine bases, column baseplates, and anchor bolts — anywhere a void needs to be filled without any shrinkage gap forming as it cures. This calculator takes the length, width, and depth of the void, plus how many identical voids you have, and computes the total grout volume and how many 50 lb bags you'll need.
The math multiplies length × width × depth to get the volume of one void, multiplies by the void count for the total volume, then divides by a typical mixed yield of about 0.5 ft³ per 50 lb bag to estimate the bag count. Yield varies by manufacturer and water ratio, so always confirm the exact figure on your product's data sheet before ordering.
Because non-shrink grout is often placed under structural load-bearing elements, deviating from the specified water ratio or curing conditions can reduce strength or cause re-shrinkage. For large orders or structurally critical pours, cross-check quantities against the manufacturer's technical data sheet and, where the application is structural, get sign-off from a qualified engineer or contractor.
Frequently Asked Questions
It varies by product, but a typical 50 lb bag of non-shrink grout yields roughly 0.5 cubic feet of mixed grout. Always check the manufacturer's data sheet for the exact yield.
Yes — enter the number of identical voids and the calculator multiplies the single-void volume by that count to get the total quantity.