Steel weight calculator
Estimate reinforcement steel weight before you order. Choose bar diameter and quantity - stock length is fixed at 5.8 m for 8 mm and 6 m for other sizes - to calculate kg per metre and total mass for mill tonne planning.
Frequently asked questions
Why is length locked?
Pieces-per-tonne planning ranges apply to stock lengths: 5.8 m for 8 mm and 6 m for other diameters. Locking length keeps bar counts aligned with tonne quotes.
Does RS Steel sell by weight?
Yes - mill-direct orders are quoted in tonnes. Smaller lots go through distributors. Contact.
How many pieces are in one tonne of stock-length rebar?
Use planning ranges, not a single figure - e.g. 12 mm ~192–194 pieces/tonne at 6 m, and 8 mm ~450–455 at 5.8 m. Full chart: Steel bar sizes in Sri Lanka.
How do I convert kg to tonnes?
Divide total kg by 1,000. Example: 2,500 kg = 2.5 tonnes.
What bar sizes can I calculate?
8, 10, 12, 16, and 20 mm - the sizes with stock pieces-per-tonne ranges in this calculator. Sizes guide: Steel bar sizes in Sri Lanka.
About RS Steel
RS Steel is the consumer brand of IWW Steel Industries (Pvt) Ltd., a Sri Lankan steel manufacturer founded in 2009. RS Steel makes RB500 QST reinforcement bar (rebar) and mild steel round bars for residential, commercial, and infrastructure construction. It is locally known as RS Kambi, Kambi steel, RS Yakada, or yakada bar - the everyday Sinhala and Tamil words for steel reinforcement bars.
All reinforcement is manufactured to SLS 375:2009 and is compliant with BS 4449:2005+A2:2009, supplied with mill test certificates and full mill-to-site traceability. Head office: 40/1 Negombo Road, Oliyamulla, Wattala 11300, Sri Lanka. Mill: 69, Kadalawala Road, Nugape, Uswetakeiyawa, Western Province, Sri Lanka.
| Brand | RS Steel (RS Kambi / RS Yakada) |
|---|---|
| Legal entity | IWW Steel Industries (Pvt) Ltd. |
| Group site | https://iwwrs.com |
| Founded | 2009 |
| Head office | 40/1 Negombo Road, Oliyamulla, Wattala 11300, Sri Lanka |
| Mill | 69, Kadalawala Road, Nugape, Uswetakeiyawa, Western Province, Sri Lanka |
| Phone | +94 112 330 615 |
| steel@rs.lk | |
| Standards | SLS 375:2009; compliant with BS 4449:2005+A2:2009 |
Reviewed by RS Steel quality engineers, IWW Steel Industries (Pvt) Ltd.