TMT Steel Quantity Estimator — Delhi NCR & UP Builders
Planning how much TMT steel you need before your structural design is ready? Use this estimator to get a quick tonnage range based on built-up area and floors. Results use standard industry thumb rules — useful for budgeting and sizing your steel order. Your structural engineer's Bar Bending Schedule (BBS) is the final word.
Steel Quantity Estimator
Thumb-rule method · IS 1786:2008 · Planning stage only
How this estimator works — the thumb-rule method
Structural steel quantity estimation before detailed design relies on per-square-foot thumb rules derived from years of built data across similar project types. These are not approximations made up for convenience — they are backward calculations from actual completed buildings.
Residential RCC frame (G+1 to G+4): 3.5 to 4.5 kg per sq ft of built-up area, with 4 kg/sq ft as the working midpoint. A 2,000 sq ft floor plate in a 3-floor building (6,000 sq ft total) lands at roughly 21–27 MT of TMT steel. The midpoint estimate is 24 MT.
Commercial RCC frame (offices, retail, showrooms): 5 to 5.5 kg per sq ft. Commercial buildings carry heavier live loads (floors designed for crowds, machinery, or stacking), which requires more steel in slabs, beams, and columns.
Both ranges already include an allowance for typical site wastage (3–5%) and lapping. Do not add wastage again on top.
Bar size guidance — foundations, columns, slabs
Steel quantity is only half the picture — the other half is which diameters to order in what proportion. Your BBS will specify exact sizes, but typical RCC-frame distribution looks like this:
| Structural element | Typical bar sizes | Note |
|---|---|---|
| Foundations & footings | 12–16 mm | Main bars; stirrups 8–10 mm |
| Columns & beams | 12–20 mm | Main bars; links/stirrups 8 mm |
| Slabs | 8–10 mm | Main & distribution bars |
| Heavy columns / transfer beams | 25–32 mm | As specified by structural engineer |
These are typical patterns. Your structural drawings will specify exact diameters, lengths, and lap lengths — always order to the BBS, not to generalised patterns.
Grade selection — Fe 500D vs Fe 550
Rungta Steel TMT bars are available in Fe 500, Fe 500D, and Fe 550 — all certified to IS 1786:2008, all supplied with mill test certificates on every consignment.
Fe 500D is the standard recommendation for residential construction in Delhi NCR and UP. The ductile grade (16% elongation minimum) is suited to Seismic Zone IV, and most structural engineers default to it for RCC-frame houses and apartments. It carries a small price premium over Fe 500 — worth it for seismic safety.
Fe 550 makes sense for commercial and industrial projects where the structural engineer is optimising for strength-to-weight ratio. At 550 N/mm² yield, fewer or smaller bars may achieve the same structural result, potentially cutting steel quantity by ~10% versus an Fe 500 design. Confirm with your engineer before specifying.
Premier Steels does not stock Fe 550D. Stocked grades: Fe 500, Fe 500D, Fe 550.
Bar weight formula — D² ÷ 162 (IS 1786)
When working from a BBS, use the standard IS 1786:2008 formula to convert bar lengths to weight:
| Dia (mm) | Weight (kg/m) | Weight (kg/12m bar) |
|---|---|---|
| 8 mm | 0.395 kg/m | 4.74 kg |
| 10 mm | 0.617 kg/m | 7.4 kg |
| 12 mm | 0.889 kg/m | 10.67 kg |
| 16 mm | 1.58 kg/m | 18.96 kg |
| 20 mm | 2.469 kg/m | 29.63 kg |
| 25 mm | 3.858 kg/m | 46.3 kg |
| 28 mm | 4.84 kg/m | 58.08 kg |
| 32 mm | 6.321 kg/m | 75.85 kg |
Standard bundle lengths from mill: 12 m. Cut lengths as per BBS; laps at 50–60 bar diameters in tension zones.
Ready to get your steel?
Premier Steels supplies Rungta TMT bars to contractors, builders, and project managers across Ghaziabad, Delhi NCR, and Uttar Pradesh. Minimum order 5 MT for delivery; no minimum for ex-yard pickup. Mill test certificate with every consignment.
- Rungta TMT Price Today — Delhi NCR & UP — Indicative rate ranges. Confirm exact price on WhatsApp.
- Authorized Rungta TMT Dealer in Delhi NCR — Why authorized matters; how to verify your distributor.
Frequently Asked Questions
How accurate is this TMT steel quantity estimate?
The estimator uses industry thumb rules: 3.5–4.5 kg/sq ft for residential RCC-frame construction and 5–5.5 kg/sq ft for commercial. These are planning-stage figures used by contractors and quantity surveyors to size orders before detailed design. Your structural engineer's Bar Bending Schedule (BBS) is the definitive document — it will be more precise because it accounts for your actual column grid, span lengths, and load conditions. Use this tool to get a ballpark before design, not to replace engineering.
What does Fe 500D mean and why is it recommended for residential?
Fe 500D is a ductile TMT grade per IS 1786:2008. The 'D' stands for ductility — it has a minimum elongation of 16%, compared to 12% for standard Fe 500. Higher elongation means the bar bends and absorbs energy before breaking, which is exactly what you want in seismic zones. Delhi NCR and western UP fall in seismic Zone IV. For any RCC-frame building in this region, Fe 500D is the sensible choice — and what most structural engineers specify.
When should I use Fe 550 instead of Fe 500D?
Fe 550 (550 N/mm² yield strength, also IS 1786:2008) is suited for heavy-load structures: multi-storey commercial buildings, industrial sheds, infrastructure like bridges and flyovers. Its higher strength allows your structural engineer to reduce bar diameters or spacing, which can cut steel quantity by roughly 10% versus an Fe 500 design. For standard residential construction, Fe 500D is the preferred choice. Fe 550 makes economic sense when the project is structural-engineer-driven and optimizing for material savings at scale.
What bar sizes should I use for foundations, columns, and slabs?
As a general guide (your BBS governs): Foundations and footings — 12 mm to 16 mm main bars. Columns and beams — 12 mm to 20 mm main bars, 8 mm stirrups. Slabs — 8 mm to 10 mm distribution bars. Larger diameters (25 mm, 28 mm, 32 mm) are used in heavily loaded columns and transfer beams. These are typical patterns — your structural drawings will specify exact diameters, lengths, and lap lengths.
What is the formula for TMT bar weight per metre?
Standard formula per IS 1786: Weight (kg/m) = D² ÷ 162, where D is diameter in mm. Examples: 8 mm → 0.395 kg/m; 10 mm → 0.617 kg/m; 12 mm → 0.889 kg/m; 16 mm → 1.580 kg/m; 20 mm → 2.469 kg/m; 25 mm → 3.858 kg/m; 32 mm → 6.321 kg/m. Multiply by the total length from your BBS to get total weight per size, then sum for total tonnage.
Does the estimate include wastage and lapping?
Yes — the thumb-rule factors already incorporate typical site wastage (3–5%) and lapping allowance, which is why they sit higher than the raw theoretical weight. Standard lap lengths are 50–60 bar diameters for tension zones. If you are working from a BBS with exact cut lengths, add 5–8% for wastage and laps explicitly. Do not double-count by applying wastage again on top of a thumb-rule estimate.
Can I get the estimated quantity supplied by Premier Steels?
Yes. Premier Steels is an authorized Rungta Steel distributor in Ghaziabad supplying Delhi NCR and Uttar Pradesh. Monthly capacity is 10,000+ MT. Once you have your estimate, WhatsApp us with the grade, quantity, and delivery location — Vivek Aggarwal will respond personally with a price and delivery timeline.