A Complete Guide to Measuring for Blinds: Your Ultimate Blinds Measuring Guide

Choosing the perfect blinds can transform any room. But before you pick your style or colour, there’s one crucial step: measuring your windows correctly. It might sound tricky, but I’m here to make it simple and stress-free. With the right measurements, your new blinds will fit perfectly, look fantastic, and work smoothly. Ready to get started? Let’s dive into this complete guide to measuring for blinds.
Why Accurate Measuring Matters for Your Blinds
Getting your measurements right is the foundation of a great blind installation. If you measure too small, your blinds won’t cover the window properly, leaving gaps that let in unwanted light or compromise privacy. Too large, and the blinds might not fit inside the window frame or could look bulky and awkward.
Accurate measuring ensures:
A neat, professional finish
Smooth operation of your blinds
Maximum light control and privacy
No need for costly adjustments or returns
Think of it as the first step to a hassle-free window makeover. Taking your time here saves you headaches later.
How to Measure Your Windows: The Blinds Measuring Guide
Let’s get practical. Here’s a step-by-step process to measure your windows for blinds. You’ll need a steel tape measure, a pencil, and some paper to jot down your numbers.
Step 1: Decide on the Mount Type
Before measuring, decide if you want an inside mount or an outside mount.
Inside mount means the blinds fit inside the window frame. This gives a clean, streamlined look.
Outside mount means the blinds cover the window frame and sometimes overlap the wall. This can make windows look bigger and hide unattractive frames.
Your choice affects how you measure, so keep this in mind.
Step 2: Measure Width
For inside mount, measure the width at three points: top, middle, and bottom of the window recess. Use the narrowest measurement to ensure the blinds fit inside.
For outside mount, measure the exact width you want the blinds to cover. Usually, add 5cm to 10cm on each side to block light and improve privacy.
Step 3: Measure Height
For inside mount, measure the height at three points: left, centre, and right of the window recess. Use the longest measurement to make sure the blinds cover the full height.
For outside mount, measure from the top of where you want the blind to start (usually above the window frame) down to the window sill or desired endpoint.
Step 4: Check Window Depth (for Inside Mounts)
Make sure your window recess is deep enough to fit the blind. Most blinds need at least 3cm depth, but check the product specifications.
Step 5: Record Your Measurements Clearly
Write down your measurements in millimetres (mm) or centimetres (cm), depending on your preference. Double-check each number to avoid mistakes.

Tips for Measuring Different Window Types
Windows come in all shapes and sizes. Here’s how to handle some common types:
Bay Windows
Measure each window panel separately. Bay windows often have angled frames, so take care to measure the width and height of each section individually.
Arched or Round Windows
Blinds for these windows usually require custom shapes. Measure the widest and tallest points, and consult with your supplier for specific advice.
Windows with Obstructions
If your window has handles, locks, or other obstructions, measure around them carefully. For inside mounts, ensure the blind won’t hit these parts when lowered.
Small or Narrow Windows
For very narrow windows, consider blinds that stack neatly when raised, like roller blinds or Venetian blinds with slim slats.
Common Measuring Mistakes to Avoid
I’ve seen many people make simple errors that cause big problems later. Here’s what to watch out for:
Rounding measurements up or down - Always measure precisely and use exact numbers.
Measuring the wrong part - Know whether you’re measuring inside the frame or outside.
Not measuring multiple points - Windows aren’t always perfectly square. Measuring at several points helps you choose the best fit.
Ignoring window depth - Some blinds won’t fit if the recess is too shallow.
Forgetting to note down measurements immediately - Write them down as you go to avoid confusion.
If you want a detailed walkthrough, check out this blind measuring guide for extra tips and visuals.

What Tools Do You Need for Measuring?
You don’t need fancy equipment. Here’s what works best:
Steel tape measure - Flexible and accurate, ideal for window frames.
Pencil and paper - To jot down your measurements clearly.
Step ladder or stool - For high or hard-to-reach windows.
Spirit level (optional) - To check if your window frame is level, which can affect blind fit.
Avoid using cloth tape measures as they can stretch and give inaccurate results.
How to Measure for Different Blind Types
Different blinds have slightly different measuring needs. Here’s a quick guide:
Roller Blinds
Measure width and height as described. For inside mounts, the blind will fit within the recess. For outside mounts, add extra width and height for coverage.
Venetian Blinds
Measure the recess width and height. Venetian blinds need enough depth to accommodate the slats when raised.
Roman Blinds
Measure the width and height of the window recess. For outside mounts, add extra width and height to cover the frame.
Vertical Blinds
Measure the width and height of the window recess. Vertical blinds require enough depth for the headrail.
Final Checks Before Ordering Your Blinds
Before you place your order, double-check:
All measurements are accurate and clearly noted.
You’ve chosen the correct mount type.
The window recess depth suits your blind style.
You’ve considered any obstructions or special window shapes.
If you’re unsure, don’t hesitate to ask for help. Many suppliers offer free measuring advice or even professional measuring services.
Ready to Transform Your Space with Perfectly Fitting Blinds?
Measuring for blinds doesn’t have to be daunting. With this guide, you have everything you need to get it right the first time. Remember, the key is patience and precision. Take your time, measure carefully, and soon you’ll enjoy the beauty and function of custom blinds that fit your windows perfectly.
If you want to explore more or need extra help, check out this blind measuring guide for detailed instructions and support.
Happy measuring, and here’s to your stunning new blinds!




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