Window & Door Calculator
Calculate rough opening sizes, total area, estimated cost, and R-value by frame type for window and door replacement projects.
Opening Dimensions
Affordable, low maintenance, good insulation
Quick Select
Standard Windows
Standard Doors
🪟
Enter opening dimensions
Results will appear here instantly
Frame R-Value Comparison
| Frame Type | R-Value | Cost/ft² | Notes |
|---|---|---|---|
| Vinyl | R-3 | $25 | Affordable, low maintenance, good insulation |
| Wood | R-3.5 | $40 | Classic look, excellent insulation, needs maintenance |
| Aluminum | R-1.5 | $20 | Durable, slim profile, poor insulation |
| Fiberglass | R-4 | $45 | Premium, strongest R-value, low maintenance |
| Wood-Clad | R-3.7 | $50 | Wood interior, aluminum exterior, premium |
Standard Window Sizes
| Window Type | Width | Height | Rough Opening | Area |
|---|---|---|---|---|
| Single Hung (24x36) | 24" | 36" | 25" x 37" | 6.0 ft² |
| Single Hung (30x48) | 30" | 48" | 31" x 49" | 10.0 ft² |
| Single Hung (36x60) | 36" | 60" | 37" x 61" | 15.0 ft² |
| Double Hung (28x54) | 28" | 54" | 29" x 55" | 10.5 ft² |
| Double Hung (32x60) | 32" | 60" | 33" x 61" | 13.3 ft² |
| Casement (24x48) | 24" | 48" | 25" x 49" | 8.0 ft² |
| Sliding (36x24) | 36" | 24" | 37" x 25" | 6.0 ft² |
| Sliding (48x36) | 48" | 36" | 49" x 37" | 12.0 ft² |
| Picture (48x48) | 48" | 48" | 49" x 49" | 16.0 ft² |
| Picture (60x48) | 60" | 48" | 61" x 49" | 20.0 ft² |