MS Sheet Weight Calculator

Q: What is the weight of 1 mm thick MS sheet per square metre?

About 7.85 kg per square metre . For mild steel, just multiply the thickness in mm by 7.85: 1 mm = 7.85 kg/m² 2 mm = 15.7 kg/m² 3 mm = 23.55 kg/m² 6 mm = 47.1 kg/m² To see this in the tool, set the unit to mm and enter width 1000 and length 1000.

Q: How do I find the weight per square foot?

Keep the unit on mm, type your thickness, then enter 304.8 for both width and length. That is one square foot. For mild steel, 1 mm sheet works out to about 0.73 kg per square foot . A 2 mm sheet is about 1.46 kg per square foot.

Q: Why is my delivered sheet weight different from the calculated weight?

Because the tool gives theoretical weight . Real sheets vary a little: Mills allow a small thickness tolerance Sheets are cut slightly over or under size Mill scale, oil, rust, or paint add a bit A gap of 2–5% is normal. Anything bigger is worth asking about.

Q: Does the cost result include tax, cutting, or delivery?

No. The cost is only weight × your rate . Add tax, cutting charges, bending, and freight on top yourself.

MS Sheet Weight Calculator

Updated Aug 21, 2026 By Jehan Wadia

Introduction

This MS Sheet Weight Calculator tells you how much a mild steel sheet or plate weighs. Just type in the thickness, width, and length of the sheet, plus how many pieces you have. The tool does the math and shows the weight right away.

Steel is sold by weight, not by size. So knowing the weight helps you order the right amount, plan a truck load, and check a supplier's bill. The calculator uses this simple formula:

Weight = Thickness × Width × Length × Density × Number of Pieces

Mild steel has a density of 7.85 g/cm³, and that value is already set for you. You can also pick other metals from the list, like stainless steel, aluminium, brass, or copper. If you know your own density value, you can type it in. For thicker material sold as plate, our MS Plate Weight Calculator and Steel Plate Weight Calculator work the same way.

You can work in mm, cm, m, inches, or feet. Results can show in kg, pounds, grams, or metric tons. Add a price per kg, pound, or tonne and the tool also gives you the cost. Below the answer you get a step-by-step solution, so you can see exactly how the weight was found, plus charts that compare weights by quantity and by material.

How to use our MS Sheet Weight Calculator

Enter the size of your steel sheet, how many pieces you need, and the material. The calculator gives you the weight of one sheet, the total weight of all sheets, the volume, and the cost if you add a price.

Dimension Unit: Pick the unit for your sheet size — mm, cm, m, inches, or feet. If you switch units, the numbers you already typed change over for you. Handy side tools for converting by hand include the Mm To Inches Calculator, Inches To Mm Calculator, and Feet To Meters Calculator.

Thickness (t): Type how thick the sheet is, such as 1 mm or 6 mm. This is the gauge of the plate.

Width (W): Type the shorter side of the sheet face, like 1000 mm.

Length (L): Type the longer side of the sheet face, like 2000 mm. If you only know the face area, the Area of a Rectangle Calculator helps you work back to a missing side.

Number of Pieces: Type how many sheets you have. Use a whole number, 1 or more.

Material Preset: Choose your metal, such as mild steel, stainless steel, aluminium, brass, or copper. This fills in the density for you. Pick "Custom" to set your own. For a single-metal check, try the Aluminum Weight Calculator, Stainless Steel Weight Calculator, or Copper Weight Calculator.

Material Density: Leave this at 7.85 g/cm³ for mild steel, or type your own value. You can also change the density unit to kg/m³, lb/in³, or lb/ft³. Our Density Calculator and Specific Gravity Calculator are useful if you need to work a density out from a sample.

Price per Unit Weight: This one is optional. Pick your currency, type the rate you pay, and choose per kg, per lb, or per tonne. Leave it blank to skip the cost. To convert a quoted rate, the Kg To Lbs Calculator comes in handy.

Volume Display Unit: Choose how you want the volume shown — cm³, mm³, m³, in³, ft³, or litres. See the Volume Calculator or Volume Conversion Calculator for more shapes and units.

Weight Display Unit: Choose kg, lbs, metric tons, or grams for your weight results.

Press Calculate to see the answers, the step-by-step math, and the charts. Press Reset to start again with the default values.

What Is MS Sheet Weight?

MS sheet means mild steel sheet — a flat plate of low-carbon steel used in gates, ducts, tanks, truck bodies, machine guards, and building work. The weight of a sheet is how many kilograms (or pounds) that flat piece of steel weighs. Steel is sold by weight, not by piece, so knowing the weight tells you the price, the load on a truck, and how many workers or lifts you need to move it. For shipping quotes, pair this with the Volumetric Weight Calculator or the Freight Class Calculator.

The Formula

A sheet is just a box shape, so its weight is volume times density:

Weight = Thickness × Width × Length × Density

Volume is the space the steel fills. Density is how heavy the metal is for its size. Mild steel has a density of 7.85 g/cm³, which is the same as 7850 kg/m³. So a sheet 1 metre by 2 metres and 1 mm thick holds 2000 cm³ of steel and weighs about 15.7 kg. The same volume-times-density idea drives our Metal Weight Calculator, Mass Calculator, and Concrete Weight Calculator.

A quick shop shortcut for mild steel in metric units:

Weight (kg) = Length (m) × Width (m) × Thickness (mm) × 7.85

Why Thickness Matters Most

Length and width are easy to see, but thickness drives the weight the most because it changes in small steps. Going from 2 mm to 3 mm adds 50% more steel and 50% more cost, even though the sheet looks the same. Old shop talk uses gauge numbers instead of millimetres. A higher gauge number means a thinner sheet. Our Sheet Metal Weight Calculator covers gauge work in more detail, and the Percentage Increase Calculator shows how much a thickness bump adds.

Common Sheet Sizes

Most mills sell mild steel sheets in set sizes. Popular ones are 1000 × 2000 mm, 1250 × 2500 mm, and 4 × 8 feet (1219 × 2438 mm). Common thicknesses run from 0.5 mm up to 12 mm. Above about 6 mm, the same product is often called a plate instead of a sheet. For stainless work in that range, see the SS Plate Weight Calculator.

Other Metals

The same formula works for any flat metal sheet. Only the density changes:

Metal	Density (g/cm³)
Aluminium	2.70
Titanium	4.51
Zinc	7.14
Mild steel (MS)	7.85
Galvanized steel	7.87
Stainless steel 304	7.93
Stainless steel 316	7.98
Brass	8.50
Copper	8.96

Aluminium is about one third the weight of steel for the same size sheet. That is why it is picked for panels and cladding where weight is a problem. Working with other steel shapes? Try the Steel Weight Calculator, Square Tube Weight Calculator, I Beam Weight Calculator, or the MS Pipe Weight Calculator.

Tips for Real Jobs

Keep units the same. Mixing millimetres with metres is the most common mistake. Convert everything first, or use the Unit Converter Calculator.
Order some extra. Cutting, offcuts, and scrap mean you use more steel than the finished part needs. Many builders add 5–10%. The Percentage Calculator makes that waste margin quick to work out.
Expect small gaps. Mills allow a thickness tolerance, so a real sheet may weigh a bit more or less than the math says. Rolling mills often bill on theoretical weight from this same formula. Check any difference with the Percent Error Calculator.
Check the lift. A 6 mm sheet at 1250 × 2500 mm weighs about 147 kg. That is a crane or forklift job, not a hand-carry job. If it hangs from a rope or sling, the Pulley Calculator and Force Calculator help you size the gear.
Galvanized sheets weigh a touch more because of the zinc coating on both faces.
Budget the whole fabrication. Sheet, bar, and fixings all add up — the Rebar Calculator, Bolt Torque Calculator, and Beam Deflection Calculator round out most steel jobs.

Formulas used

Dimension conversion to centimetres

x_{\text{cm}} = x_{\text{input}} \times k_{\text{unit}}, \quad k_{mm}=0.1,\; k_{cm}=1,\; k_{m}=100,\; k_{in}=2.54,\; k_{ft}=30.48

Volume of one sheet

V_1 = t \times W \times L \quad (\text{cm}^3)

Total volume of all pieces

V_{total} = V_1 \times n

Weight of a single sheet

m_1 = \frac{V_1 \times \rho}{1000} \quad (\text{kg, with } \rho \text{ in g/cm}^3)

Total weight of all pieces

m_{total} = m_1 \times n

Weight converted to display unit

m_{disp} = \frac{m_{kg}}{f_{unit}}, \quad f_{kg}=1,\; f_{g}=0.001,\; f_{lb}=0.45359237,\; f_{t}=1000

Density converted to g/cm³

\rho_{g/cm^3} = \rho_{input} \times c,\quad c_{g/cm^3}=1,\; c_{kg/m^3}=0.001,\; c_{lb/in^3}=27.6799047,\; c_{lb/ft^3}=0.0160184634

Estimated cost

p_{kg} = \frac{p_{input}}{f_{basis}}, \qquad C = m_{total(kg)} \times p_{kg}

Frequently asked questions

What is the weight of 1 mm thick MS sheet per square metre?

About 7.85 kg per square metre. For mild steel, just multiply the thickness in mm by 7.85:

1 mm = 7.85 kg/m²
2 mm = 15.7 kg/m²
3 mm = 23.55 kg/m²
6 mm = 47.1 kg/m²

To see this in the tool, set the unit to mm and enter width 1000 and length 1000.

How do I find the weight per square foot?

Keep the unit on mm, type your thickness, then enter 304.8 for both width and length. That is one square foot.

For mild steel, 1 mm sheet works out to about 0.73 kg per square foot. A 2 mm sheet is about 1.46 kg per square foot.

How much does a standard 8 ft × 4 ft MS sheet weigh?

An 8 × 4 ft sheet is 2438 × 1219 mm. At 2 mm thick it weighs about 46.7 kg. At 3 mm it is about 70 kg, and at 5 mm about 116.7 kg.

Type those numbers into the tool to check any thickness you need.

Does the calculator subtract holes and cutouts?

No. It treats the sheet as one solid rectangle, so the answer is the full sheet weight.

If you cut big holes or slots, work out the weight of the missing pieces and subtract it yourself. For small bolt holes, the change is tiny and most people ignore it.

Can I use this for a round or odd-shaped piece?

Yes, with one trick. Find the area of your shape first, then enter a width and length that multiply to that same area.

Example: a disc with an area of 0.5 m² — enter width 0.5 m and length 1 m. The weight will be correct because volume stays the same.

Why is my delivered sheet weight different from the calculated weight?

Because the tool gives theoretical weight. Real sheets vary a little:

Mills allow a small thickness tolerance
Sheets are cut slightly over or under size
Mill scale, oil, rust, or paint add a bit

A gap of 2–5% is normal. Anything bigger is worth asking about.

If I switch the dimension unit, do I have to retype my sizes?

No. The tool converts the numbers you already typed. If you switch mm to inches, 1000 mm becomes 39.37 in on its own.

The weight stays the same, because only the way it is shown changes.

Can I type a gauge number instead of mm?

No. Change the gauge to mm first, then type that. Common steel sheet gauges:

20 gauge ≈ 0.91 mm
18 gauge ≈ 1.21 mm
16 gauge ≈ 1.52 mm
14 gauge ≈ 1.90 mm
12 gauge ≈ 2.66 mm
10 gauge ≈ 3.42 mm

How many sheets make up one tonne?

Set the pieces to 1 and read the single sheet weight in kg. Then divide 1000 by that number.

Example: a sheet weighs 15.7 kg, so 1000 ÷ 15.7 = about 63 sheets per tonne. You can also raise the piece count until the total reads 1 t.

Does the cost result include tax, cutting, or delivery?

No. The cost is only weight × your rate. Add tax, cutting charges, bending, and freight on top yourself.

What is the volume result useful for?

It shows how much space the steel itself fills. It helps you:

Check the weight math is right
Work out paint or coating area needs
Compare metals at the same size

Does paint or galvanizing add weight?

Yes, a small amount. Zinc coating usually adds about 1–3% on thin sheet. Paint adds even less.

Pick the Galvanized / Carbon Steel preset (7.87 g/cm³) for a slightly closer number, or add a few percent to your total.

Can I use this for chequered (tread) plate?

Enter the base thickness, not the top of the raised pattern. Then add about 5% for the tread pattern, or use your supplier's chart if you have one.

I know the weight but not the thickness. Can I work it out?

Yes. For mild steel in metric units:

Thickness (mm) = Weight (kg) ÷ (Length in m × Width in m × 7.85)

Or just change the thickness in the tool until the weight matches your number.

Should I use 7.85 or 7.86 for mild steel density?

Either is fine. The gap is about 0.13%, so on a 100 kg order that is only 130 grams. 7.85 g/cm³ is the value most mills and standards use, so keep it.

Can I use the calculator to price scrap steel?

Yes. Enter the sheet size and pieces, then type the scrap rate in the price box and pick per kg, per lb, or per tonne. The total cost gives you a rough scrap value.

Why do some answers show more decimal places than others?

The tool adds more decimals for small numbers so thin or tiny pieces stay accurate. Big numbers get fewer decimals because extra digits do not help.

Why does the chart show at least 10 pieces?

The line chart always plots up to 10 pieces or your quantity, whichever is bigger. This lets you see how fast the load grows, which helps with truck and lifting limits.

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