Steel Calculators: Weight, Bar Count & Cutting
Calculate steel weight, round pipe weight, coil length, rebar bars per tonne and stock lengths for cutting. Free tools with formulas and worked examples.
From weight to a buying and cutting plan
Choose a tool for your next step. Every calculator explains its inputs, units and method.
Steel Pipe Weight Calculator by Diameter and Wall
Calculate round steel pipe weight per metre, per length and per order using outside diameter, wall thickness and quantity. Free formula and example.
Open calculatorSteel Coil Length Calculator from Weight
Convert net steel coil weight to length and area using width and thickness. Includes kg per metre, kg per square metre, formula and worked example.
Open calculatorRebar Bars per Tonne and Order Quantity Calculator
Convert rebar tonnage to whole bars by diameter and length. See bars within a weight limit, bars needed to meet a target and the resulting order weight.
Open calculatorSteel Stock Cutting and Waste Calculator
Estimate stock lengths for identical rebar, pipe or profile cuts. Include blade kerf and end trim; see pieces per stock, offcuts and material yield.
Open calculator
Weight calculators and section tables
Rebar weight calculator
Weight per metre = 0.00617 × diameter² (mm)
- Weight per metre
- 1.21 kg
- Weight per bar
- 14.5 kg
- Total weight
- 14.5 kg
- Tonnes
- 0.01
Frequently asked questions
How is rebar weight calculated?
Kilograms per metre = 0.00617 × diameter² (mm). A 14 mm bar is about 1.21 kg/m; a 12 m bar about 14.5 kg.
How is sheet weight calculated?
Length × width × thickness × 7.85. Enter metres and millimetres to get kilograms.
What is the standard section table?
It is the geometric and weight reference for beams, angles and channels. A mill may roll lighter than the published standard.
Why does a mill section differ from the standard table?
Some mills roll light to cut the per-bar ticket. Buy on kilograms and compare the actual section weight.