🚪 Windows & Doors
Windows & Doors calculators
Window area, sill, rough opening, glass weight and replacement, sliding/bifold door, curtain and blind sizing, plus glazing energy savings.
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Curtain / Blind Size Calculator
Calculates curtain fabric or blind dimensions from window size
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Door Rough Opening Calculator
Calculates rough opening dimensions for door installation
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Glass Weight Calculator
Estimates weight of a glass pane by dimensions and glass type
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Glazing Panel Calculator
Calculates glazing panel area and weight for conservatories
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Sliding / Bifold Door Calculator
Estimates panel count and structural header for wide openings
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Window Area Calculator
Calculates total window area for heat loss and glazing sizing
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Window Energy Rating Calculator
Estimates window energy rating (A to G) from U-value and solar gain
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Window Replacement Cost Calculator
Estimates cost to replace windows by count, size, and glazing type
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Window Sill Calculator
Calculates linear metres or feet of window sill board