materials
Door & Window Cost Calculator
Estimate opening area and supply-install cost for repeated doors or windows.
Total cost
NPR 1,29,600
Order / treated area
10.8 m²
How this works
Total opening area = width × height × quantity; cost = area × rate.
Worked example
Six 1.2 × 1.5 m windows total 10.8 m².
FAQ
What is the Door & Window Cost Calculator used for?
Estimate opening area and supply-install cost for repeated doors or windows. It is intended for quick planning, checking, and everyday decisions.
Can I use the result for a final contract or design?
Use it as a planning estimate. Hardware, glass specification, frames, grills, transport, and making-good may be separate.
How can I improve the accuracy?
Use measured quantities, current supplier or lender rates, the correct units, and compare the result with drawings, invoices, or professional advice where the decision is safety-critical.