Rebar Weight & Bar Calculator

The site engineer's rebar takeoff calculator — weight, stirrups and 12 m stock bars in one honest tool.

Pick the bar diameter with big Ø8–Ø32 chips, enter length and count on a glove-friendly keypad, and read the total steel weight in kg (with tonnes for big numbers) — computed from the published nominal unit-weight table (EN 10080 / ISO 6935-2). Lap splices are one stepper away: the length defaults to the 40Ø field rule and stays fully editable.

STIRRUPS (PRO)
Element length and spacing give the stirrup count; section b×h, concrete cover and the 135° hook (auto max(10Ø, 75 mm), editable) give the single-stirrup length. Pick Ø8 or Ø10 and read the total stirrup steel in kg.

12 M BARS
Simple mode: enter the running total length and get the stock bars to buy plus the waste. Cut-list mode (Pro): enter piece lengths × counts and get a first-fit-decreasing packing into 12 m bars — bars to buy, waste in m and %, a clear verdict against the usual 3–5% estimating budget, and a bar-by-bar cutting plan.

PRO
• Multi-item project takeoff: per-diameter totals plus a grand total in kg and tonnes
• Stirrup planner
• Cut-list optimizer with the packing plan
• Save takeoffs to history
• Share clean PDF reports

Built for gloves and sunlight: big keypad, huge results, Outdoor Bright mode.

Everything stays on your phone — fully offline, no account, no tracking.

Results are estimating aids; always verify with the structural drawings.

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