Curtain Size Calculator – Fast Accurate Measurements

Curtain Size Calculator instantly determines the width and drop needed for any window, so you can order the right amount of fabric without guesswork.

What Curtain Size Calculator Does

• Calculates total curtain width based on window size and chosen overlap.
• Adjusts drop length for rod pocket, grommet, or tab top styles.
• Handles both metric and imperial units.
• Estimates fabric yardage for selected pleat or stitch type.
• Suggests gathering ratios for a tailored appearance.
• Generates printable results for easy ordering.

Who Uses Curtain Size Calculator

• Professional interior designers
• DIY homeowners planning window treatments
• Window‑treatment retailers preparing client quotes
• Contractors installing custom curtains

These users need precise measurements to keep material costs down and avoid re‑orders.

Common Use Cases

• Determining fabric needed for a bedroom drape set.
• Planning curtains for a large living‑room picture window.
• Creating a quote for a client’s kitchen renovation.
• Verifying dimensions before ordering custom sheers.
• Adjusting measurements after changing curtain hardware.
• Generating a cut list for a multi‑panel window treatment.

How It Works

1. Enter window width and height, then select the measurement system.
2. Choose heading style and pleat ratio that match your design.
3. Press “Calculate” to view width, drop, and fabric yardage.
4. Print or copy the results for ordering or record‑keeping.

Why Curtain Size Calculator Works Well

Accurate numbers, no trial‑and‑error.

The tool applies industry‑standard formulas for overlap, heading allowance, and pleat spacing, which eliminates the common guesswork that leads to excess fabric.

Because it runs entirely in the browser, there’s no data upload, and results appear instantly, letting you make decisions on the spot.

Frequently Asked Questions

Is Curtain Size Calculator free to use?

Yes, the calculator is completely free and does not require a subscription or account.

Can I switch between metric and imperial units?

Both centimeters/inches and meters/feet can be selected at any time, and the results update automatically.

How precise are the fabric yardage estimates?

Estimates follow standard industry ratios for pleats and headings, delivering dimensions accurate enough for most commercial and residential orders.

Do I need to create an account to save my calculations?

No account is needed; each calculation is performed locally and can be printed or copied for later reference.

Can I calculate multiple windows in one session?

Yes, simply repeat the input steps for each window; the tool handles each calculation independently.