Curtain Size Lab Search

FREE MEASUREMENT TOOL · NO SIGN-UP

Curtain Width Calculator

Calculate total curtain width and width per panel from rod width, fullness, and panel count. Results update as you type and all assumptions stay visible.

LIVE FULLNESS PLAN

Flat fabric width from finished coverage

Source-backed planning range for Grommet / eyelet: 1.5×–2×. Tape, carriers, hooks, and workroom specifications can override it.

TOTAL FLAT CURTAIN WIDTH

129.6 in
Per panel64.8 in
Fullness1.8×
Coverage72 in
Panels2
72 in × 1.8 = 129.6 in

METHOD

How the calculation works

Fullness is total flat fabric width divided by finished coverage width. The result is split evenly across the selected number of panels.

Heading presets provide editable planning ranges from published manufacturer and retailer guidance. Proprietary wave or ripple-fold products must use the exact carrier, tape, and pocket-factor chart.

The visual effect still depends on fabric body, lining, and stack-back, so the highest ratio is not automatically the best choice.

Estimate, then verify

Measure the actual window and selected product. Manufacturer dimensions, heading systems, fabric behavior, and pattern matching can change the result. These tools do not determine hardware strength, fixings, or a guaranteed fit.

SOURCE NOTES

What this page is based on

Measurements here combine mathematical results with labeled commercial conventions and design recommendations. Disagreements are kept as ranges rather than averaged into a false standard.

  1. MATILDA curtain product specificationsIKEA · reviewed 2026-09-11

    Manufacturer product guidance presents 1.5×, 2×, and 2.5× rod/track-width options for light through extra-full looks.

  2. Buying curtainsJohn Lewis & Partners · reviewed 2026-09-11

    Retailer/workroom guidance on pole extension, hanging references, sill/floor endpoints, ready-made metric ranges, and double fullness.

  3. Ripplefold fabrication guideKirsch · reviewed 2026-09-11

    Proprietary system manual with 60%, 80%, 100%, and 120% fullness options (approximately 1.6× to 2.5× fabric factors).

  4. Wave curtain workroom guideSilent Gliss · reviewed 2026-09-11

    Proprietary wave-system workroom guide; glider spacing and pocket factor determine approximate fullness, including a 2.1× example.