The Concrete Displaced by Rebar calculator estimates the net weight added to a slab by adding rebar, and the reduction in concrete cause by adding rebar.
INSTRUCTIONS: Choose units and enter the following:
Weight and Volume Change from Rebar added to Slab (W and V): The calculator returns the following weights and volumes in standard units. However, these units can be automatically converted compatible units (e.g., cubic yards to cubic meters) via the pull-down menu.
Rebar weighs more than concrete and it takes up space in a concrete slab. When you add rebar to a slab or other concrete form (e.g. wall), you add weight and reduce the amount of concrete to fill the form. This calculator:
Density of Rebar vs Concrete: