Square Bar Weight Calculator
This square bar weight calculator finds the weight of a solid square bar from its side and length. Enter them and the square bar weight calculator returns the total weight and the weight per meter. As a square rod weight calculator it uses the standard steel density, so the result matches mill tables for every common bar size.
Results
The Square Bar Weight Calculator is part of our Weight collection. Browse more weight to size, convert, and check your work alongside this tool.
What the square bar weight calculator shows
A square bar is a solid bar with a square cross section, and the square bar weight calculator finds its weight from the side and the length. It squares the side for the cross section, multiplies by the length for the volume, and multiplies by the steel density for the weight. As a square rod weight calculator it returns the weight per meter and the total, so you can order by the kilogram or the ton.
The square bar weight formula
The square bar weight formula squares the side, then multiplies by length and steel density:
The side is in millimeters, and 0.00785 folds in the steel density of about 7,850 kg per cubic meter for a per meter result. A square bar carries more metal than a round bar of the same width, since the square fills the corners the circle leaves empty, so it is heavier for the same nominal size.
Square bar weight calculator example
A 20 mm steel square bar, 1 m long. The square bar weight calculator applies the formula:
So a 1 m length of 20 mm square bar weighs about 3.14 kg. Change the side and the square bar weight calculator returns a new weight at once.
How to use the square bar weight calculator
Enter the side of the square in millimeters and the length, then the square bar weight calculator returns the total weight and the weight per meter. Use the nominal side stamped on the bar, such as 12 mm or 20 mm. For a full order, run each size through the square rod weight calculator once and add the totals.
Reading the square bar weight calculator result
The weight per meter is the unit weight for that side; the total is that value times length and quantity. Because weight follows the side squared, doubling the side nearly quadruples the weight, so large bars get heavy fast. Order by total weight, since steel is priced by the kilogram or ton. For stainless, the density is a little higher, so an ss square bar weight calculator runs slightly heavier than mild steel of the same size.
When to use the square bar weight calculator
- Pricing an order by weight with the square bar weight calculator
- Checking a delivery against a square bar weight chart
- Building a cutting list with a square rod weight calculator
- Comparing square and round bar for a job
Common square bar weight calculator mistakes
- Using round bar values. A square bar is heavier than a round bar of the same width, so use the square formula.
- Wrong material density. Set stainless or another metal when the bar is not mild steel.
- Mixing units. Enter the side in millimeters so the per meter result comes out right.
Tips for square bar takeoffs
- Enter the nominal side stamped on the bar.
- Order by weight, since steel is priced by the kilogram or ton.
- Switch the density for stainless or other metals.
MS square bar weight calculator and per meter
An ms square bar weight calculator rests on the volume of a square prism: side times side times length, multiplied by the steel density. Fold the density and the unit changes into one constant and the square bar weight per meter is simply the side squared times 0.00785, with the side in millimeters. Because the side is squared, the weight climbs steeply: a 25 mm bar at nearly 5 kg per meter weighs more than six times a 10 mm bar, even though the side only grew two and a half times. That is why heavy square sections add cost fast, and why picking the smallest side that carries the load saves both steel and money. An ms square rod weight calculator uses the same math, since a square rod and a square bar are the same section by another name.
12mm square bar weight per meter and chart
Standard sizes make a square bar weight chart handy, and the 12mm square bar weight per meter is one of the most looked up, at about 1.13 kg per meter. A chart lists the common sides so you can read a weight without a calculation, but it always follows the same side squared rule, so any size between the listed ones interpolates cleanly. Some regions quote a 12mm square bar weight per feet instead, which is the per meter value divided by about 3.28. Whichever unit your supplier uses, the underlying figure comes from the section and the density, and this square bar weight calculator gives it for any side and length you enter, matching the chart at the standard sizes.
Square bar weight chart
Steel square bar weight per meter by side, from the square bar weight chart:
| Side | Weight per meter | Weight per 6 m |
|---|---|---|
| 10 mm | 0.79 kg/m | 4.71 kg |
| 12 mm | 1.13 kg/m | 6.78 kg |
| 16 mm | 2.01 kg/m | 12.06 kg |
| 20 mm | 3.14 kg/m | 18.84 kg |
| 25 mm | 4.91 kg/m | 29.44 kg |
Square Bar Weight Calculator FAQ
What is the square bar weight formula?
The square bar weight formula is weight per meter equals side squared times 0.00785, with the side in millimeters for steel. The square bar weight calculator applies it and multiplies by length for the total.
What does a 12mm square bar weigh per meter?
About 1.13 kg per meter for mild steel, from 12 squared times 0.00785. That is the 12mm square bar weight per meter mill tables list.
Is a square bar heavier than a round bar?
Yes, for the same nominal width. A square section fills the corners a circle leaves empty, so a square bar is about a quarter heavier than a round bar of the same size.
Does it work for stainless?
Yes, with a higher density. An ss square bar weight calculator runs a little heavier than a mild steel square bar of the same side.