Curtain Size Lab Search

LENGTHS GUIDE · REVIEWED SEPTEMBER 11, 2026

120-Inch Curtains: Extra-Long Measurement Guide

Measure for 120-inch curtains, convert ten feet to 304.8 centimeters, and check proportion for high-mounted treatments.

MEASURED WIDTHFINISHED DROP
Original proportional diagram. Use actual measurements; drawing is not to scale for a specific product.

SHORT ANSWER

Start here

A 120-inch curtain is 10 feet or 304.8 centimeters long. It belongs in an extra-long plan when the measured attachment point-to-endpoint drop supports it. Ceiling height alone is not enough, and long panels do not establish suitable hardware or installation capacity.

Finished label120 in
Metric conversion304.8 cm
Use whenDrops near 10 ft
Decision basisMeasured hanging-point drop

How to measure

  1. 01

    Measure the usable rod or track span and record decorative finials, returns, bends, or overlaps separately.

  2. 02

    Measure the finished drop from the attachment point named for the selected heading to the intended lower endpoint.

  3. 03

    Convert inches and centimeters only after recording the original measurement; use 1 inch = 2.54 centimeters.

  4. 04

    Compare the calculated target with the exact product label, package quantity, heading take-up, and manufacturer tolerance before ordering.

WORKED CALCULATION

120-inch curtain check

Measured hanging-point drop
119.25 in
Candidate finished length
120 in (304.8 cm)
Heading reference
Selected product instructions
Formula120 in candidate − 119.25 in target

0.75 in (1.9 cm) longer than the example target

A positive difference means the labeled panel is longer than this example target. Recheck the actual heading and finished product before choosing an endpoint.

Recalculate with your measurements

What 120-inch curtains mean

120 inches converts to 304.8 centimeters. That is the nominal finished panel length, not the window height and not necessarily the distance from the rod centerline to the lower edge. The heading construction determines where the fabric begins.

Where this length tends to make sense

This length can suit high-mounted treatments and tall glazed openings when the lower endpoint is also planned. The extra cloth changes visual scale and stack, while fabric weight and support remain separate manufacturer or installer decisions.

Compare the neighboring ready-made lengths

A 120-inch panel adds 12 inches (30.5 cm) over 108 inches and 24 inches (61.0 cm) over 96 inches. If the measured target sits between labels, compare alteration options and finished tolerance instead of assuming the longer choice will work.

Check the real finished position

Measure left, center, and right on wide openings. Finished size, header take-up, ring or carrier geometry, fabric behavior, and manufacturer tolerance can move the lower edge; the label alone does not guarantee a particular clearance or fit.

Before you order or cut

Measure the actual window and selected product. Finished sizes, fullness, header take-up, hardware geometry, and manufacturer tolerances vary. Fabric can shrink, stretch, or behave differently by composition. Measurements do not guarantee fit, privacy, water containment, installation, load capacity, or structural safety. Use the selected product instructions, and have a professional workroom verify expensive custom-fabric orders.

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. 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.

  2. BETYDLIG/RÄCKA/HUGAD buying guide — Measure your windowIKEA · reviewed 2026-09-11

    Primary manufacturer guide: add at least 6 in each side, add 6 in above, and use 2–2.5× rod width for panel planning.