Mirror Sizing Calculator
Mirror dimensions for wall or vanity from room proportions.
Inputs
Results
Mirror area (m²)
0.54
Mirror area (ft²)5.81
Weight per mirror (kg)5.4
Silver needed (g)0.49
Silver nitrate (g)0.81
Copper backing (g)0.22
Backing paint (ml)108
Est. material cost ($)$15.12
Total Glass Weight Kg5.4
How to Use This Calculator
- Enter Width (or diameter for circular mirrors) and Height in mm.
- Enter Glass Thickness in mm and select the Shape: rectangle, oval/ellipse, or circle.
- Enter Number of Mirrors to produce and any Bevel Width in mm.
- Review Mirror Area in m² and ft², Glass Weight per mirror, and Total Silver required.
- Check Silvering chemicals (silver nitrate, copper) and Backing Paint quantities for studio batch planning.
How the result changes with Width / diameter (mm)
| Width / diameter (mm) | Mirror area (m²) |
|---|---|
| 545 | 0.49 |
| 1,783 | 1.6 |
| 3,268 | 2.94 |
| 4,505 | 4.05 |
What each input means
- Width / diameter (mm)
- Mirror width (or diameter for circular mirrors).
- Height (mm)
- Mirror height (ignored for circular shape).
- Glass thickness (mm)
- Mirror glass substrate thickness. Common: 3, 4, 5, 6 mm.
- Number of mirrors
- How many identical mirrors to produce.
- Shape
- 0 = Rectangle, 1 = Oval/Ellipse, 2 = Circle.
- Bevel width (mm)
- Width of decorative beveled edge. 0 = no bevel.
What each result means
- Mirror area (m²)
- Surface area of one mirror.
- Mirror area (ft²)
- Surface area of one mirror in square feet.
- Weight per mirror (kg)
- Weight of one mirror including glass substrate.
- Silver needed (g)
- Total metallic silver for all mirrors (~0.9 g/m²).
- Silver nitrate (g)
- Silver nitrate solution needed for silvering.
- Copper backing (g)
- Copper for protective backing layer.
- Backing paint (ml)
- Paint for backing protection (2 coats).
- Est. material cost ($)
- Approximate material cost including glass, silvering, and bevel work.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersWidth / diameter (mm) = 600, Height (mm) = 900, Glass thickness (mm) = 4, Number of mirrors = 1 = 6 input(s) provided
- Calculate Mirror areaMirror area0.54 = 0.54
- Calculate Mirror areaMirror area = areaSqM * 10.76395.81 = 5.81
- Calculate Weight per mirrorWeight per mirror = areaSqM * (thicknessMm / 1000) * 25005.4 = 5.4
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