Curtain Size Calculator

Written by Great Medico

Updated September 26, 2026 •1 min read

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The Curtain Size Calculator uses the calculator’s current visible inputs and calculation model. This version was refreshed against the current reference workflow instead of relying on the older generic Everyday Life template.

What this calculator does

Current curtain type/fullness flow using published 4-inch rod allowance, café half-height, extra-long +6-inch allowance, and 2×/2.5×/3× widths.

How to use it

Enter or select the relevant values, including Type of curtain, Curtain fullness, Window height, Window width. Keep measurement units consistent; the calculator converts supported units before applying the formula.

How the calculation works

The result is calculated from the published relationship represented by the fields above. Supporting metrics are shown so you can sanity-check the primary result rather than relying on a single unexplained number.

Limitations

Real-world measurements, product specifications, fit, safety requirements, and manufacturer guidance can vary. Use the result as a calculation aid and verify critical decisions with the relevant product documentation or professional guidance.