Driveway Rebar Calculator

Size the rebar mat for a driveway. Enter the driveway length and width, the bar spacing and cover, and get the bar count both ways plus the total steel weight.

0

How to use: Driveway Rebar Calculator

Enter driveway length and width.
Set the bar spacing and edge cover.
Pick the bar size for the total.

Formula

Bars each way = floor((dimension − 2 × cover) ÷ spacing) + 1, × kg/m for the weight.

See the full rebar weight chart (kg/m & lb/ft) →

Driveway Rebar Calculator — FAQ

What size rebar for a driveway?

#3–#4 (10–13 mm) at 300–450 mm centres is common for residential driveways.

Do driveways need rebar?

Reinforcement helps control cracking; thickness and bar size depend on loading.