Curtain size calculator
Curtain Size Calculator for Width, Length & Panels
Calculate curtain rod length, total curtain width, finished panel length, fullness ratio, and how many ready-made curtain panels to buy. Start with a bare window or an installed rod and get practical numbers before you order.
Sizing method
How this curtain size calculator turns measurements into panel sizes
The calculator first finds the rod or track length, then multiplies that coverage width by your curtain fullness ratio. It divides the total fabric width by one ready-made panel width, rounds up to a real panel count, and adjusts the finished length for hover, kiss, break, or puddle styling.
Use it for living room curtains, bedroom blackout curtains, sliding glass doors, rental-friendly rods, sheer layers, and wide windows where guessing panel count can leave the curtains too thin. The result is a planning number, so always compare it with the package label and the hardware limits before checkout.
Guides
Curtain measuring guides for every buying question
Each guide supports the calculator with a practical search intent: how to measure for curtains, how panel width affects fullness, how to choose curtain length, and how to match results to ready-made sizes.
