Four quick steps. Your numbers just need to be in the ballpark — we come out, walk the property, and lock the exact price before any work.
Film prices per pane of glass, not per window unit. A storefront with one "big window" is often three panes between mullions — and a back entrance with sidelights is one unit but three panes. Quick reference:
Pick a method. Per-size mode is especially fast for commercial work — most buildings have repeating window sizes you can multiply.
Count individual panes per the step 1 diagrams. Mullion-divided storefronts and curtain walls have more panes than they look like.
Add a row for each distinct size — same-size panes multiply. A typical storefront might be: 20 panes at 48×96, 6 panes at 36×48, 4 transoms at 60×24.
Pick a specific film for a solid price, or let us match to your objective for a range.
Volume rate ($1–2/ft² off) kicks in past 250 ft² on standard tiers. Specialty films are quoted as a band — the on-site walk locks the exact number.