Steel type
Carbon steel (7840 kg/m³)
Shape of the plate
Illustration of a rectangular plate that shows its length, width, and thickness.
Plate details
Length (L)
Width (W)
Thickness (t)
cu in
Quantity of plates
Final output
Total weight

This steel plate weight calculator will help you determine the weight of steel plates, no matter their area and thickness. This calculator is an extension of our steel weight calculator, but focuses on steel plates. We equipped this calculator with the same list of common steel alloys to provide you with your steel plate's weight.

In this steel plate calculator, we will briefly describe what steel is, and how to measure a steel plate's weight using its density and volume. You will also learn about some uses of steel plates. So what are you waiting for? Let's get started!

What is steel?

Steel is a metal alloy comprised of iron and carbon. The presence of carbon makes steel stronger and more resistant to breaking. The more carbon in the steel, the stronger it gets.

Adding other alloying elements to steel can even improve the steel's ductility, hardness, durability, corrosion-resistance, and much more. To learn more about this, check out the what is steel? section of our steel weight calculator.

Steel plates and some of its uses

Steel plates have many uses, most notably in the construction and fabrication of various steel products. We can cut steel plates into many shapes, punch them, drill holes in them and bolt it together for movable connections, or forego the drilling entirely and welded them together for a fixed connection.

Steel plates have a variety of purposes: as gusset plates in trusses, as flanges and fin supports for posts, and in the fabrication of pressure vessels such as boats, ships, and even military vehicles.

Combined image showing a steel bridge made of steel beams connected by steel gusset plates, and an image of a steel post with steel base plate and supporting fins.

How important is knowing the weight of steel plates?

Like other raw materials such as gravel, sand, and concrete, steel is also commonly priced per unit weight. Since we can purchase steel in various types, shapes, and sizes, pricing steel per unit weight is easier and creates consistent pricing within the market. This way of pricing is the reason we calculate the weight of steel in general.

Determining the total weight of the products we purchase, including steel plates, helps us properly plan their transport from the supplier's warehouse to our project or fabrication site. Aside from these reasons, knowing the weight of the steel plates we use in our projects can also help us work out if we can lift the final product, like the one we illustrated in the sample computation of steel weight section of this text.

How to measure steel plate weight?

Determining the weight of steel plates is so easy. First, we need to know the density of the steel alloy our plate is made of. In our steel plate weight calculator, we have the densities of the most common steel alloys, found in the Steel type field. As a reference, here is a table of the density of each steel alloy or steel type in our steel plate calculator:

Steel type
Density (kg/m³)
Tool steel
Wrought iron
Carbon tool steel
Cold-drawn steel
Carbon steel
C1020 HR steel
Pure iron
Mild steel
Stainless steel

After we've determined the density of our steel plate, the next step is to obtain the total volume of our steel plate. We can do this in a variety of ways, but the easiest is to get the area of our plate and multiplying it by the plate's thickness. After obtaining the volume of our steel plate, we can now multiply this volume by our steel plate's density to calculate its weight, as shown below:

steel plate weight = steel plate volume * density

If you need to calculate multiple steel plates of the same dimensions, you can input the number of steel plates you have into our steel plate weight calculator to get the total steel plate weight. How about we consider an example to better understand how to calculate steel plate weight?

How the steel weight plate calculators works?

For our example, let us determine the weight of the steel plates that we would need to build, say, a mold for cube-shaped concrete blocks. For our mold, we need to cut 5 squares, each with 20 cm sides from a 1-cm thick mild steel (7,870 kg/m³) plate as shown in the illustration below:

Illustration of a 20cm X 20cm X 1cm steel plate that is formed to make a mold to make cube-shaped concrete blocks.

To solve the weight of these cut steel plates, let us first calculate the volume of the steel plate by multiplying its dimensions together. Since we already know that the density of mild steel is in kilograms per cubic meter, let us solve the steel plate volume in cubic meters. The 20-centimeter side is equal to 0.2 meters, and the 1-centimeter thickness is equal to 0.01 meters. So, we can find the volume of a single piece of square plate:

steel plate volume = 0.2 m * 0.2 m * 0.01 m

steel plate volume = 0.0004 m³

Solving for weight, we have:

steel plate weight = steel plate volume * density

steel plate weight = 0.0004 m³ * 7,870 kg/m³

steel plate weight = 3.148 kilograms

However, since we need five pieces of this square steel plate, the steel plates' total weight would then be 3.148 kg * 5 = 15.74 kilograms. That's a lot of weight for just a small piece of cube mold!

Want to learn more?

If you've found our steel plate weight calculator informative, you might also like our metal weight calculator. You can learn more about other metals, how to calculate their weight, their densities, and also some of their uses.

Kenneth Alambra