# Curtain Panel Calculator

URL: https://speedycalculator.com/calculators/everyday-life/curtain-panel/
Last updated: 2026-10-25

> The curtain panel calculator works out how long to cut each curtain panel for grommet, pleated, rod-pocket or tab-top heading, how many fabric widths you need for the chosen fullness, and the total fabric in yards and metres.

## Inputs

- Heading type
- Fullness
- Rod width (bracket to bracket) (in, cm)
- Finished length (in, cm)
- Rod circumference (in, cm)
- Fabric width (in, cm)

## Results

- Total finished width
- Fabric widths (panels)
- Cut length per panel
- Total fabric

## Formula

```
Total finished width = rod (bracket-to-bracket) width × fullness
Panels (fabric widths) = ceil(total width ÷ (fabric width − 2 in side hems))
Cut length = finished length + heading and hem allowances
Total fabric = panels × cut length
```

## Explanation

Curtains look full only when the fabric is gathered: 2× fullness is standard, 2.5× looks luxurious and 3× is used for sheers. Each heading style also needs a different allowance at the top – a rod pocket must fit around the rod, while grommets and pleats need a doubled header.

### How to use the Curtain Panel Calculator

- **Heading type**
- **Fullness**
- **Rod width (bracket to bracket)**
- **Finished length**
- **Rod circumference**
- **Fabric width**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Choose the heading, fullness, rod width and finished length, the rod circumference (for rod pockets) and the width of your fabric.

### Tips

- Measure over thin clothing with a soft tape held snug but not tight, and keep the tape level all the way round.
- Take each measurement twice; if you are between sizes, the larger size is usually the safer choice.
- Size charts vary by brand and country – check the maker's own chart when it is available.
- For sewing projects, pre-wash fabric before cutting and buy 10% extra for shrinkage, pattern matching and mistakes.

### Common mistakes to avoid

- Mixing inches and centimetres between the tape and the size chart.
- Forgetting seam and hem allowances when cutting fabric.
- Measuring an old, stretched garment instead of your body.

### Inputs explained

FieldWhat to enterHeading typeChoose one: Grommet / eyelet, Pinch pleat, Rod pocket, Tab topFullnessChoose one: 2× (standard), 2.5× (deluxe), 3× (sheers, ultra)Rod width (bracket to bracket)Units: in, cmFinished lengthUnits: in, cmRod circumferenceUnits: in, cmFabric widthUnits: in, cm

### What each result means

- **Total finished width** = [Rod width (bracket to bracket)]×[Fullness]
- **Fabric widths (panels)** = ceil([Total finished width]÷([Fabric width] - 2×0.0254) - 0.000001)
- **Total fabric** = [Fabric widths (panels)]×[Cut length per panel]

### Example values

How the main result changes when **Rod width** changes and everything else stays at the example values above:

Rod width (bracket to bracket) (in)Fabric widths (panels)3024526037539041205

## Worked example

Inputs — Heading type: Grommet / eyelet; Fullness: 2× (standard); Rod width (bracket to bracket): 60 in; Finished length: 84 in; Rod circumference: 3 in; Fabric width: 54 in.

Results — Total finished width = 120 in; **Fabric widths (panels) = 3**; Cut length per panel = 94 in; Total fabric = 7.83 yd.

## FAQ

**How many curtain panels do I need?**
Multiply the rod width by the fullness and divide by the usable fabric width – a 60 in rod at 2× fullness with 54 in fabric needs 3 widths.

**How much extra length for a rod pocket?**
About 8½ in plus half the rod circumference for the pocket, header and bottom hem.

**Should I add pattern repeat?**
Yes – add one repeat to each cut length so patterns line up across panels.

**What formula does the Curtain Panel Calculator use?**
Total finished width = rod (bracket-to-bracket) width × fullness.