Why RebarCalc
Rebar weight from Ø8 to Ø32 with published kg/m values, lap lengths, stock-bar counts with a cut list, and stirrup geometry — metric and imperial (#3–#10).
Published weights
Ø8–Ø32 kg/m per ISO; #3–#10 lb/ft.
Lap lengths
Default 40Ø, adjustable.
Stock bars & cut list
12 m bars with a first-fit cut plan.
Stirrups
Count, cut length and total from section + cover.
Grouping
Totals grouped by diameter for ordering.
Tonnes & pounds
Order-ready totals in your unit.
How it works
Enter bars
Diameter × length × count (+ laps).
Add stirrups
Beam length, spacing, section, cover.
Read totals
Weight, stock bars and cut list.
FAQ
Where do the kg/m values come from?
Standard published unit weights (d²/162 basis, ISO rounding) — verified by automated tests.
Does it plan cutting?
Yes — stock-bar count with a simple first-fit cut list.
Imperial sizes?
US bar sizes #3–#10 with lb/ft output.
Who is it for?
Site engineers, foremen and estimators.
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