Rebar & Reinforcement Calculators
Browse $10 calculators in this category — organized by project group, with each tool featuring its own formula, worked example and technical diagram. All calculators run 100% in your browser — no backend, no tracking. US customary default with metric where useful.
$10 calculators · $3 groups
Core
Rebar Calculator
Calculate rebar quantity and spacing for concrete reinforcement. Determine how many bars you need with equal c
OpenRebar Weight Calculator
Calculate rebar weight per foot and total tons from length, size and spacing — for ordering. Enter rebar dimen
OpenRebar Quantity Calculator
Calculate rebar quantity — how many units, bags or pieces you need with waste factor. Enter rebar dimensions t
OpenRebar Cost Calculator
Calculate rebar project costs for reinforced concrete structures. Determine material quantity and detailed cos
OpenSpacing & Length
Rebar Spacing Calculator
Calculate equal center spacing from length and member count. Enter rebar dimensions to get instant results.
OpenRebar Length Calculator
Calculate rebar length — rebar length and weight from count, length per bar and size with waste for US project
OpenRebar Grid Calculator
Calculate rebar grid count and spacing — how many pieces and equalized centers with waste for US layouts.
OpenRebar Lap Length Calculator
Calculate rebar lap length — additional steel for laps with waste for US projects. Enter rebar dimensions to g
Open