Curtain Length with Pleats Calculator
Get perfect curtain measurements with pleats. Enter your window size and curtain style.
Total width of window frame
Height from rod to floor
Type of curtain heading
Style of pleat (if applicable)
How full the curtains appear
How long you want curtains
Only if Custom Length selected
Distance rod hangs above window
What fullness ratio do I need for different curtain styles?
Fullness determines how full and luxurious curtains look: 1.5x (Light fullness): Minimal, formal, sheers only. 2.0x (Standard): Most common for everyday use, good drape. 2.5x (Full): Classic look, nice folds, most popular. 3.0x (Luxurious): Fullest, dramatic, premium look. Higher fullness = more fabric and cost but better appearance. Never go below 1.5x for permanent curtains.
How long should curtains be?
Curtain length affects the room's formality: Sill length (1" above sill): Casual, kitchens, bathrooms. Below radiator (window + 12"): Standard for most rooms. Floor length (1-2" from floor): Most common, modern, clean look. Puddle (6-12" on floor): Formal, dramatic, bedrooms. Always measure from rod to floor, not window to floor. Add extra for rod pocket if using rod pocket style.
What's the difference between pleat types?
Box pleat: Crisp, tailored, formal. Knife pleat: Angled, contemporary. Pencil pleat: Rounded, cord-like, most common. Goblet: Rounded ends like wine glass, formal. Pinch (French): 3-finger pinch, classic formal. Each creates different fold patterns. Pencil pleat is most versatile; box/goblet are most formal. Budget = no pleats (flat); Premium = goblet/pinch.
How do I measure for curtains?
Width: Measure window frame, add 4-6" per side for light blocking, multiply by fullness ratio. Length: Measure from rod (not window top) to floor or sill. For rod pocket: add pocket depth (3-4"). For grommet: measure from rod to floor, add 4" for header. Always round up to nearest inch. If ordering custom, tell them finished measurements including heading, not just window size.
Single curtain panel or pair?
Single panel: Covers entire window when pulled to one side, good for light filtering. Pair (two panels): Standard for most windows, can draw fully closed for full coverage. Width per panel should be at least half window width before fullness. Single 50" panel covers 25-30" when closed; pair covers 50-60". Always use pair for main living areas and bedrooms. Single okay for decorative/secondary windows.