Quick answer
Glass mass = length × width × thickness × 2,500 kg/m³. A 1,000 × 500 mm pane 6 mm thick weighs 7.5 kg (16.53 lb), or 15 kg per square metre.
Enter length, width, thickness and the unit. The calculator returns the weight and weight per square metre.
Related tools: Pipe Weight Calculator: Weight of a hollow round pipe from its outside diameter, wall thickness and length. Gold Weight Calculator: Mass of pure gold from its volume. Metal Weight Calculator: Weight of a plate, round bar or square bar in common metals.
How to use the Glass Weight Calculator
- Enter length (above 0).
- Enter width (above 0).
- Enter thickness (above 0).
- Choose unit for all three: Millimeters and Inches.
- Press Calculate to see the result, and use Reset to start again.
| Input | What to enter | Allowed values |
|---|---|---|
| Length | A number | > 0 |
| Width | A number | > 0 |
| Thickness | A number | > 0 |
| Unit for all three | Choose one: Millimeters; Inches | Starts at Millimeters |
Formula and method
Formula
mass = length × width × thickness × 2,500 kg/m³
IEEE-754 double precision; shown to the decimals indicated.
Uses the density of soda-lime-silica float glass, 2,500 kg/m³ (2.5 kg per m² per mm of thickness). Plan geometry only; confirm quantities with your supplier and local code before ordering.
Worked examples
These examples are verified: each one is an automated test case that the live calculator must reproduce exactly.
Example 1
Inputs: Length = 1000; Width = 500; Thickness = 6; Unit for all three = Millimeters.
| Result | Value |
|---|---|
| Glass weight | 7.5 kg |
| In pounds | 16.53 |
| Per square meter | 15 kg/m² |
Example 2
Inputs: Length = 36; Width = 24; Thickness = 0.25; Unit for all three = Inches.
| Result | Value |
|---|---|
| Glass weight | 8.85 kg |
| In pounds | 19.51 |
| Per square meter | 15.88 kg/m² |
Example 3
Inputs: Length = 2000; Width = 1000; Thickness = 10; Unit for all three = Millimeters.
| Result | Value |
|---|---|
| Glass weight | 50 kg |
| In pounds | 110.23 |
| Per square meter | 25 kg/m² |
The first line is the headline result (glass weight). Below it the glass Weight Calculator lists in pounds and per square meter, which describe the same case from other angles. IEEE-754 double precision; shown to the decimals indicated.
A quick rule
Float glass weighs about 2.5 kg per square metre per millimetre of thickness, so 6 mm glass is 15 kg/m². A 2 m² pane of 6 mm glass is 30 kg.
Handling and fitting
Weight matters for lifting, frames and hinges. Laminated and special glasses differ slightly in density. Use the nominal thickness and allow for edge work.
How the result changes with length
Holding every other input at the first worked example, this table changes only length. It shows how sensitive the answer is to that one value; each row was produced by running this calculator.
| Length | Glass weight | In pounds | Per square meter |
|---|---|---|---|
| 500 | 3.75 kg | 8.27 | 15 kg/m² |
| 1000 | 7.5 kg | 16.53 | 15 kg/m² |
| 2000 | 15 kg | 33.07 | 15 kg/m² |
| 4000 | 30 kg | 66.14 | 15 kg/m² |
What happens with invalid input
These messages are produced by the calculator itself, so you know what to fix.
- Length: entering "0" shows "Length must be greater than 0." beside that field and no result.
- Thickness: entering "0" shows "Thickness must be greater than 0." beside that field and no result.
Choosing between the Glass Weight Calculator and similar calculators
Each row shows what a related calculator on this site asks for and what it returns, so you can pick the one that matches your question.
| Calculator | You enter | It returns |
|---|---|---|
| [Pipe Weight Calculator](/construction/pipe-weight/) | outside diameter, wall thickness and length | Pipe weight |
| [Gold Weight Calculator](/construction/gold-weight/) | volume and unit | Mass |
| [Metal Weight Calculator](/construction/metal-weight-calculator/) | material, shape and dimension A | Weight |
| [Rebar Weight Calculator](/construction/rebar-weight-calculator/) | bar size, length of each bar and number of bars | Total weight |
| [Money Weight Calculator](/construction/money-weight/) | denomination and amount | Weight |
Background: construction estimates
Material quantities are geometry plus a margin. Calculate the exact volume or area, add an allowance for waste, spillage, cuts and uneven ground (calculator pages commonly mention 5 to 10 percent, a rule of thumb that varies by material and job) and round up to whole units. One cubic yard is exactly 27 cubic feet.
Suppliers often have minimum order sizes and may charge for small loads, so confirm quantities, product yields and local code with your supplier or a qualified estimator before ordering.
Assumptions and limitations
- Laminated and special glasses differ
Quantities are estimates. Add allowances for waste and site conditions, and follow local codes and a qualified professional's instructions for structural or safety-critical work.
If a required value is empty, not a number, or outside its allowed range, the form marks that field with a message and shows no result instead of a misleading number. The automated checks deliberately try invalid entries for length and thickness to confirm this.
Frequently asked questions
How much does 10 mm glass weigh?
About 25 kg per square metre.
Is double glazing double the weight?
Roughly, plus the spacer.
Do all dimensions need the same unit?
Yes, choose one unit for all three.
What does the Glass Weight Calculator calculate?
Weight of a glass pane from its dimensions. It returns Glass weight, In pounds and Per square meter.
What formula does the Glass Weight Calculator use?
mass = length × width × thickness × 2,500 kg/m³. Uses the density of soda-lime-silica float glass, 2,500 kg/m³ (2.5 kg per m² per mm of thickness).
What do I need to enter in the glass Weight Calculator?
You enter Length, Width, Thickness and Unit for all three.
How is the result rounded or limited?
IEEE-754 double precision; shown to the decimals indicated. Laminated and special glasses differ.
What does the “Unit for all three” option change?
It sets how the glass Weight is worked out. The choices are Millimeters and Inches.
What is an example of a glass Weight result?
With length 1000, width 500, thickness 6 and unit for all three Millimeters, the glass weight is 7.5 kg.
Where does the method come from?
The method follows: EN 572-1: density of soda-lime silicate glass 2,500 kg/m³.
Can I rely on this calculator for a decision?
Quantities are estimates. Add allowances for waste and site conditions, and follow local codes and a qualified professional's instructions for structural or safety-critical work. For this calculator in particular: Laminated and special glasses differ.
Related calculators
- Pipe Weight Calculator — Weight of a hollow round pipe from its outside diameter, wall thickness and length.
- Gold Weight Calculator — Mass of pure gold from its volume.
- Metal Weight Calculator — Weight of a plate, round bar or square bar in common metals.
- Rebar Weight Calculator — Weight of reinforcing bar by size and length.
- Money Weight Calculator — Weight of an amount of US bills or coins.
- Steel Plate Weight Calculator — Weight of a carbon steel plate from its dimensions.
Sources
- EN 572-1: density of soda-lime silicate glass 2,500 kg/m³
Content last reviewed 2026-11-04. Formulas and worked examples are checked by automated tests against independently computed values.