How To Measure for Curtains
- Updated on:
- Written by Bev Fidler
Achieving a perfect fit for your curtains can instantly elevate your home’s style, comfort, and functionality. Whether you’re a homeowner, renter, or someone who enjoys transforming spaces, learning how to measure for curtains is a key skill that ensures your window coverings look great and operate flawlessly.
This step-by-step guide will walk you through all the essentials, from choosing the right tools to mastering measurements for different curtain styles and window types.
Understanding Curtain Terminology
Before you get out the tape measure, it’s essential to understand a few key terms. Knowing these will help you plan accurately and pick the perfect curtains for your window coverings.
Basic Terms
- Drop vs Length: Some people say “drop,” others say “length.” Both terms generally refer to the vertical measurement of your curtains—from the top, where the fabric starts down to the bottom hem. This can mean the distance from your curtain rod to the windowsill, below the sill, or the floor.
- Track vs Pole: A curtain track is usually mounted to a wall or ceiling mount and utilises gliders to move curtains across smoothly. In contrast, a curtain pole (also called a curtain rod) is a decorative pole with rings or eyelets for hanging. Poles often feature decorative finials at each end.
- Finials and Brackets: Finials are the ornamental end pieces attached to curtain poles. They add a decorative touch and keep your curtains from slipping off the ends. Brackets are supports that attach the pole or track to the wall or ceiling.
Header Types
The header of your curtain—where the fabric attaches to the rod or track—comes in various styles:
- Pencil Pleat Curtains: Tightly gathered folds at the top.
- Eyelet Curtains: Metal rings that slide directly onto the pole.
- Pinch Pleat Curtains: Neat, sewn-in pleats spaced evenly across the top.
- Tab Top Curtains: Loops, or “tabs,” sewn into the top.
Curtain Fullness Explained
Fullness refers to the ratio between the actual width of your curtain fabric and your window or track width. Most curtains look best at about 1.5 to 2 times the track width, though some designs, like pinch pleat curtains, may require a slightly higher ratio for that distinctive gathered finish.
Measuring Curtain Width
Knowing how to measure curtains accurately for width is crucial. Whether you’re installing them on a curtain rod or a curtain track, you’ll want your fabric to cover the window fully when closed, with enough gather for an attractive drape when open.
Tools You Will Need
Although measuring curtains isn’t complicated, having the right tools on hand will make a world of difference. Here’s what you’ll need:
- Steel Measuring Tape: Steel tape is preferred over fabric or plastic tape for its durability and accuracy.
- Pencil and Paper: Note each measurement immediately to avoid forgetting.
- Step Ladder or Sturdy Chair: To access higher areas safely.
- Spirit Level: This helps confirm if your curtain rod or curtain track is level, especially if your window frame is slightly off.
- Helper: Having another person assist by holding the tape or confirming measurements can reduce errors.
Double-check your mounting plans before measuring if you’re installing new custom curtains where no hardware currently exists. Ensure you know precisely where the curtain rod, curtain poles, or ceiling mount brackets will sit on the wall.
For Pole-Hung Curtains
- Measure Pole Width: Start by measuring between one finial base and the other. If the finials extend beyond where the curtain will hang, measure only the functional portion of the pole.
- Factor in Fullness: Multiply the pole width by your preferred fullness ratio (e.g., 1.5 to 2 times). For instance, if the pole measures 2 metres, you might need 3 to 4 metres of fabric.
- Check for Overlaps: Consider how the curtains will meet or overlap in the middle if you have a double curtain rod or overlapping brackets.
For Track-Mounted Curtains
- Measure the Track Width: Use your tape measure to determine the track length from end to end. If your track has multiple pieces, be sure to include any overlaps.
- Fullness Ratio: Decide what fullness ratio your style requires. For styles like pleat curtains, you may need 2 to 2.25 times fullness for a well-defined drape.
- Ceiling Mount Curtains: If your curtain track is attached to the ceiling (ceiling mount curtains), the measurement process is identical—simply measure the width of the track itself. Always confirm the track’s position relative to the window frame to avoid misalignment.
Measuring Curtain Length (Drop)
With the width sorted, the next step is to measure your curtains’ drop (length). How long you want your curtains to be can vary greatly depending on style preferences, room function, and whether you have obstructions like radiators.
Different Drop Options
- Sill Length: Ends exactly at the windowsill for a neat, tailored appearance.
- Below Sill Length: Extends 10–20 cm below the window sill, offering more coverage.
- Floor Length: Comes just to the floor for a modern, sleek look that suits most rooms.
- Puddle Length: Curtains that extend onto the floor for a romantic, luxurious effect.
Measuring Steps
- Identify Rod or Track Position: If you’re using a curtain rod, measure from the underside of the rings (where the curtain actually hangs). For a curtain track, measure from the top of the track unless your header style prompts otherwise.
- Measure Down to the Desired Endpoint: Hold the tape taut, whether it’s on the sill, just below the sill, or on the floor. If you plan a “puddle,” decide how many extra centimetres you’d like to pool onto the floor.
- Allow for Headers and Hems: Some header styles, like pinch pleat curtains, will add extra fabric at the top. Also, remember to add a little extra for the hem if the curtains aren’t pre-finished.
Common Measuring Mistakes and How to Avoid Them
Even when you know how to measure curtains in theory, a few common pitfalls can lead to disappointing results. Here’s how to sidestep them:
Not Accounting for Curtain Headers: Headers add both height and width effects. Pinch pleat curtains, for example, bunch the fabric into permanent pleats. If you only measure based on the visible fabric, your curtains could end up too short or too narrow.
Incorrect Fullness Calculations: Underestimating fullness leaves you with sparse-looking curtains, while too much fullness may feel bulky. Double-check the recommended ratio for your chosen style—particularly important for pinch, pencil, or wave pleats.
Measuring Windows Without Installed Poles/Tracks: If you measure without your hardware in place, you’ll need to decide exactly where the rod or track will be installed—how high above the window frame and how far out to each side. Install the hardware first if you can, then measure for more precise results
Tips for Different Window Types
No two windows are alike, and that’s part of what makes choosing the perfect curtain for your existing decor so fun! Here’s how to handle the most common window types:
Standard Windows
- Single Windows: Measure the width of the window itself or the curtain rod, then multiply by your chosen fullness ratio.
- Double Windows: When you have two adjacent windows, consider if they’ll share one continuous curtain rod or two separate rods. Measure carefully to cover both windows and the space between them if using one rod.
- Picture Windows: These typically span a broader area. Consider extra curtain width to frame the view and allow more light with the centre opening.
Bay Windows
- Measuring Around Curves: Depending on whether you have an angled or curved bay, measure each segment separately.
- Dealing with Angles: Some bay windows feature angled corners requiring specially bent curtain poles or track sections.
- Special Considerations: Double-check brackets for bay window setups; each section may need its own bracket placement for a unified look.
Patio Doors (Sliding Doors)
- Measure the Width: Include the doorframe and any overlap needed so that the entire glass area is covered when the curtains are closed.
- Accounting for Handles and Fixtures: Ensure the curtains can glide past door handles without snagging.
- Special Considerations for Sliding Doors: Lightweight fabrics often work best for sliding doors, making the curtains easy to open and close.
Special Considerations for Different Curtain Styles
Your measuring process remains mostly the same regardless of the header style—just remember to accommodate extra fabric requirements or unique top-edge designs.
- Eyelet Curtains: Each eyelet sits on the rod, so your total drop starts a little above the rod.
- Pencil Pleat Curtains: A basic, versatile style. Remember to factor in how tight or loose you plan to gather the pleats.
- Tab-Top Curtains: Measure from the top of the tabs if they’re counted in the overall curtain length.
- Wave Curtains: These attach to a special track that helps form uniform, continuous waves. Check the recommended fullness ratio.
- Gathered Curtains: Heavier gathers typically need more width to achieve that cosy, voluminous look.
Key Takeaways
- Before measuring know the difference between drop (length), track vs pole, and header types like pencil pleat, eyelet, pinch pleat, and tab top curtains.
- Measuring curtain width requires considering the fullness ratio and measuring correctly based on your hanging method .
- When measuring curtain length (drop), determine your preferred style and measure from the underside of rings or top of track to your desired endpoint.
- Common pitfalls to watch for include not accounting for curtain headers, calculating incorrect fullness, & measuring without installing hardware first.
Need Help Choosing the Perfect Curtain?
Measuring curtains accurately can make all the difference in how your interior spaces look and feel. By following these guidelines, you’ll avoid common pitfalls, save time, and achieve a polished result that complements your décor.
Remember to measure the width carefully (including track width and pole width with finials), determine the right drop for your space, and factor in fullness for your desired curtain style—be it pencil pleat curtains, pinch pleat curtains or any number of other designs.
When you’ve finalised your measurements, you’ll be well on your way to enjoying custom curtains that fit perfectly and enhance your home’s style. If you’re still unsure or prefer professional assistance, Classic Blinds is here to help every step of the way.
Let us make your dream window coverings a reality, whether for standard windows, bay windows, or sliding doors. Contact our team to book a free measure and quote on hanging curtains in your home.
