Free bar bending schedule (BBS) calculators for RCC work in India. Each tool turns the sizes, bar diameters and spacing from a structural drawing into a list of bars with their numbers, cutting lengths and weights, using IS 2502 hook and bend rules, so you can check a steel order before cutting. Part of our free tools.
BBS calculators
Slab BBS calculator
One-way and two-way RCC slabs: main, distribution, crank and extra top bars, hooks, laps, steel kg and CSV.
Beam BBS calculator
RCC beams and lintels: main bars with anchorage, extra bars at supports, stirrups with closer spacing near supports, steel by diameter and CSV.
Column BBS calculator
RCC columns from footing to roof, G to G+3: vertical bars with laps at each floor, ties with closer spacing near floors, cross-ties, steel by diameter and CSV.
Footing BBS calculator
Rectangular isolated and combined footings and small rafts: bottom and top mesh, bent or straight bar ends, steel by diameter, concrete volume and CSV.
Retaining wall BBS calculator
Cantilever RCC walls: base slab and stem bars, shorter back-face bars, steel by diameter, concrete volume and CSV. Steel quantity only, not a wall design.
What is a bar bending schedule?
A bar bending schedule lists every reinforcement bar in a member: its mark, diameter, shape, number of bars, cutting length and weight. Site engineers use it to cut and bend steel, quantity surveyors use it to bill steel, and owners can use it to check that the steel ordered matches the drawing.
| Item | Rule used in our calculators |
|---|---|
| Number of bars | floor(length across the bars ÷ spacing) + 1 |
| Hooks (IS 2502) | 90° = 4φ · 135° = 6.25φ · 180° = 9φ per hooked end |
| Bend deduction | 2φ for each 90° bend |
| Crank (45°) | +0.42 × effective depth at each bent end |
| Laps | Only where a bar is longer than the 12 m stock length |
| Weight | φ² ÷ 162 kg per metre × cutting length × number of bars |
φ is the bar diameter in mm. For the weight of any list of bars, use the TMT bar weight calculator; for concrete and other materials, see the quantity surveying calculators.
Related guides
One-way slab reinforcement
Main and distribution bars, spacing and details.
One-way vs two-way slab
Span ratio and how the steel changes.
Fe 500 vs Fe 550 TMT bars
Which steel grade to use.
Disclaimer: Educational quantity estimates only. Reinforcement must be designed and detailed by a licensed structural engineer. Full disclaimer · contact@speakarch.com
Last updated: 8 November 2026