Window Calculators (2026): Glass Weight, Aluminium Weight, Profile Length, Window Cost & U-Value Calculator

Accurate calculations are essential for every window and door manufacturer. Incorrect material estimates can increase production costs, reduce profit margins and create manufacturing errors.

This guide explains the most common calculations used by professionals in the PVC, uPVC and aluminium window industry.

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Glass Weight Calculator

Glass weight depends on three values:

• Width
• Height
• Glass thickness

Example:

• 1000 × 1000 mm
• 4 mm glass

Approximate weight:

10 kg/m² × Area

Common glass weights

| Thickness | Weight | |-----------|---------| | 4 mm | 10 kg/m² | | 5 mm | 12.5 kg/m² | | 6 mm | 15 kg/m² | | 8 mm | 20 kg/m² | | 10 mm | 25 kg/m² |

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Aluminium Weight Calculator

Aluminium profile weight depends on:

• Profile type
• Cross-sectional area
• Length
• Aluminium density

Typical density:

2.70 g/cm³

This calculation helps estimate:

• Material costs
• Shipping weight
• Production planning

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Profile Length Calculator

Manufacturers calculate profile lengths for:

• Frame
• Sash
• Mullion
• Transom

Profile length estimation helps:

• Reduce waste
• Optimize cutting
• Improve stock management

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Window Cost Estimator

Window cost depends on:

• Profile system
• Glass type
• Hardware
• Reinforcement
• Accessories
• Labour
• Profit margin
• Taxes

Professional software such as DoorWin automates these calculations instantly.

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U-Value Calculator

The U-Value measures thermal performance.

Lower U-Values indicate better insulation.

Typical values:

| Window Type | Typical U-Value | |-------------|-----------------| | Single Glazing | 5.0–6.0 | | Double Glazing | 1.2–2.8 | | Triple Glazing | 0.7–1.2 |

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Why Accurate Calculations Matter

Professional calculations help companies:

• Reduce material waste
• Increase profitability
• Produce accurate quotations
• Improve customer satisfaction
• Plan production efficiently

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Why Manufacturers Use DoorWin

Instead of calculating every value manually, DoorWin automatically calculates:

• Glass quantities
• Aluminium and PVC profiles
• Accessories
• Costs
• Profit margins
• Taxes
• Professional quotations

This saves time while reducing human error.