Curtain Fabric Calculator
Fabric yardage needed for curtains.
Enter your values
Enter the rod width in in.
Enter the finished drop length in in.
Enter the fullness ratio in x.
Enter the fabric width in in.
Enter the hem/heading allowance in in.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Fabric needed
- 7.83 yards
- Fabric widths to join
- 3
- Cut length per width
- 94 in
Quick answer
Curtain fabric yardage depends on the rod width times a fullness ratio, divided by fabric width, times the finished drop length.
yards = ceil(widths needed) x (drop + hems) / 36
At a glance
| What it does | Fabric yardage needed for curtains. |
|---|---|
| Category | Home & DIY |
| Inputs needed | Rod width, Finished drop length, Fullness ratio, Fabric width, Hem/heading allowance |
| Main output | Fabric needed |
| Formula | yards = ceil(widths needed) x (drop + hems) / 36 |
| Cost | Free — no sign-up, no download |
How to use the Curtain Fabric Calculator
- 1Measure the rod width and finished drop of the curtains.
- 2Choose a fullness ratio (2x-2.5x is standard for a gathered look).
- 3Enter your fabric's width and hem/heading allowance to get the total yardage.
Inputs explained
- Rod width(in)
- Enter the rod width in in.
- Finished drop length(in)
- Enter the finished drop length in in.
- Fullness ratio(x)
- Enter the fullness ratio in x.
- Fabric width(in)
- Enter the fabric width in in.
- Hem/heading allowance(in)
- Enter the hem/heading allowance in in.
Worked example
Using the values the calculator loads with:
Inputs
- Rod width60 in
- Finished drop length84 in
- Fullness ratio2 x
- Fabric width54 in
- Hem/heading allowance10 in
Results
- Fabric needed7.83 yards
- Fabric widths to join3
- Cut length per width94 in
Frequently asked questions
What fullness ratio should I use?
2x is standard, 2.5x-3x for very sheer or luxurious fabrics.
Do patterned fabrics need extra?
Yes, add extra yardage per width to match the pattern repeat between panels.
What do I need to enter into the Curtain Fabric Calculator?
Just 5 values: rod width, finished drop length, fullness ratio, fabric width, hem/heading allowance. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Curtain Fabric Calculator work out the answer?
Curtain fabric yardage depends on the rod width times a fullness ratio, divided by fabric width, times the finished drop length. It applies the formula yards = ceil(widths needed) x (drop + hems) / 36 and shows the working so you can check each step by hand.
Is the Curtain Fabric Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.