Curtain Width Calculator
Work out the finished curtain panel width your window needs. Enter the window width, how far the track extends each side, whether you want a pair or single panel, and the heading — get the flat fabric width before pleating, instantly.
Your window
Extending the track 15–20 cm beyond the glass each side lets the curtains stack clear of the window, so the room feels brighter and the window looks wider. A pair also overlaps ~10 cm at the centre so the panels meet without a light gap.
Total flat fabric width
0 cm
about 0.00 m of fabric across the heading (both panels)
Track width
156 cm
rail / pole length to fit
Per-panel flat width
166 cm
each of two panels
Fullness
2×
Pencil pleat
Centre overlap
10 cm
panels meet
Extension each side
18 cm
track beyond the glass
This is the flat fabric width before pleating — the cloth gathers up to the track width once the heading is sewn. To get total fabric in metres, multiply by the drop (plus hems and pattern repeat). Use the fabric quantity calculator for that.
Style your windows with DesignAI
DesignAI recommends fabric, heading and layering to match your room, light and budget.
Related Guides — Deep-dive reading
How to Measure for Curtains: Width, Drop & Fullness (India 2026)
Measure the rod, not the glass — extend each side, mount high, choose your drop, then convert width and drop into fabric metres with fullness and panel widths. The exact step list, tools and the mistakes that waste fabric.
Window TreatmentsHotel-Style Curtains at Home: The Blackout + Sheer Luxe Look (India 2026)
How five-star hotels dress a window — full sheer plus total-blackout on one track, floor-to-ceiling and wall-to-wall, generous fullness, concealed rail and a wand at the bedside — and the exact spec to ask for, with Indian costs.
Window TreatmentsThe Architect & Designer's Curtain Specification Guide (India 2026)
How a professional specs window treatments — the soft-furnishing schedule, false-ceiling pockets and pelmets, motor wiring points, fabric allowances, trade coordination, client sign-off and the BOQ lines that make or break a handover.
Window TreatmentsRelated Tools — You may also find these useful
Curtain Cost Calculator
Get the fabric metres you need plus the total curtain cost by window size, fabric, pleat, lining and hardware.
Curtain CalculatorCurtain Fabric Quantity Calculator
Work out exactly how many metres of fabric a window needs, including pattern repeat.
Curtain CalculatorCurtain Length (Drop) Calculator
Get the finished curtain drop and the fabric cut length from your rail height and the look you want.
Curtain Calculator