How To Measure A Window For Glass Replacement
Maybe your like
-
Loyalty Rewards
With Every Purchase
-
We’re here to help
-
Track Your Order -
Order Issues -
Instant Answers -
Need Help? -
Contact/Chat with Us!
Powered by ChatGPT
-
-
+1 888-474-2221 8:30 AM - 9:00 PM EST
Powered by ChatGPT Hello, Sign inAccount & Lists Sign In New Customer? Register Are you Pro?
Sign Up for Pro My Account My Cart Loyalty Rewards Help Center Terms & Conditions Checkout Log In Returns & Order Status
My Cart You have no items in your shopping cart. View/Edit Cart Secure Checkout
- Shower Doors
- Custom glass shower doors
- Glass doors for shower
- Single sliding shower doors
- Double sliding shower doors
- Fixed shower screen
- Shower door panels
- Inline shower doors
- Frameless shower doors
- Semi frameless shower doors
Frameless, Crystal-Clear
Neo Angle Shower Doors Corner-Fit, Space-Saving
Shower Enclosure Sealed, Spacious, Sleek
Steam Shower Doors Steam-Tight, Spa-Ready
Bathtub Shower Doors Splash-Proof, Clean Lines
Corner Shower Doors Room-Maximizing
Order A Custom Cut Shower Door Save Up to $300 off On Diamondize XP Glass Shower Coating Valid Till:
Wednesday, February 11, 2026
Order Now
- Glass Table Tops Round
Circular, Elegant
Race Track Elongated, Soft-Edged
Rectangle Spacious & Modern
Glass Protectors Scratch-Resistant
Square Balanced, Stylish
Patio Glass Table Weatherproof, Sturdy
EOval Curved, Contemporary
Breakfast Tables Cozy, Functional
Custom Cut Table Top Personalized, Unique
Order A Custom Cut Glass Table Top
- Activity/Gym Mirror Commercial Gym Mirrors
Strong, Safe & Custom Glass
- 36" x 60"
- 36" x 72"
- 48" x 60"
- 48" x 72"
- 48" x 84"
- 48" x 32"
Strong, Safe & Custom Glass
- 36" x 60"
- 36" x 72"
- 48" x 60"
- 48" x 72"
- 48" x 32"
Distortion-Free Shatterproof
- 26" x 60"
- 30" x 40"
- 30" x 54"
- 36" x 72"
- 48" x 32"
Distortion-Free Shatterproof
- Pack of 4
- Pack of 12
- 10" x 10"
- 10" x 10"
- 12" x 12"
- 12" x 12"
- 14" x 14"
- 14" x 14"
- Plexi & Acrylic Glass Clear Acrylic Sheets
Transparent, Durable
Explore Plexiglass Durable, Multipurpose
Acrylic Table Top Scratch-Resistant
Acrylic Pen Holder Clear, Minimalist
Colored Plexiglass UV-Stable, Custom-Cut
Acrylic Picture Frame Lightweight, Frameless
Acrylic Shelves Floating, Sleek, Modern
Custom Plexiglass Exact-Fit, Flexible-Use
Order A Custom Cut Plexi & Acrylic Glass
- Safety / IGU Glass Tempered Glass
Impact-Resistant
Glass Chair Mats Floor-Protecting
Insulated Glass Dual-Pane, Soundproof
Bullet Resistant Multi-Layered Glass
Fire Rated Glass Safety-Certified
Custom Cut Glass Precision-Fit, Versatile
Order A Custom Cut Glass
- Architectural Glass Laminated Glass
Safety-Layered
Backsplash Glass Stylish, Stain-Resistant
Pattern Glass Textured, Decorative
Back Painted Glass Durable & Easy-to-Clean
Glass Railing Secure & Modern
Crackled Glass Artistic, Decorative
Custom Cut Glass Clean-Edged, High-Quality
Order A Custom Cut Glass
- Mirrors / LED Wall Mirrors
Decorative, Stylish
Glassless Mirrors Lightweight, Durable
LED Mirrors Energy-Efficient
Full Length Mirrors Tall, Elegant, Reflective
Antique Mirrors Vintage, Timeless
LED Makeup Mirror Lighted, Magnifying
Makeup Mirrors Illuminated
MirrorView TM Sleek, Dual-Purpose
Custom Cut Mirrors Customized
Order A Custom Cut Mirrors
- Cabinet Glass Textured Pattern
Decorative, Textured
Mirror Glass Cabinet Reflective, Sophisticated
Leaded Design Classic, Detailed, Artistic
V-Grooving Etched, Precise
Sumi Glass Opaque, Artistic
Custom Cut Cabinet Tailored, Exact-fit
Order A Custom Cut Cabinet Glass
- Glass Erase Board
- Glass Board
Frameless, Sleek, Minimalist
Available Colors - 16" x 16"
- 24" x 36"
- 36" x 48"
- 36" x 60"
- 48" x 60"
- 48" x 72"
- 48" x 96"
Elevated, Modern, Professional
Available Colors - 36" x 48"
- 48" x 60"
- 48" x 72"
- 48" x 96"
Personalized, Unique, Functional
Order A Custom Cut Glass Erase Board
- Custom Cut Glass
- Glass Shelves Rectangle Shelves
Sleek, Minimalist
Trophy Shelves Display-Ready, Compact
Qtr Circle Shelves Curved, Decorative
Acrylic Shelves Lightweight, Clear
Triangle Shelves Angular, Corner-Fit
Shelf Brackets Secure, Durable
Curved Glass Shelves Smooth, Bent-Glass
Custom Glass Shelve Exact-Measure
Order A Custom Cut Glass Shelves
- Hardware J-Bar
Strong, Safe
U Channel Floor-Safe Protection
Plastic/Rubber Bumpers, Protect
Shower Sweeps Clean Water Control
Mirror Clips Secure, Durable
Shower Door Strength Meets Style
Shelf Brackets Secure, Durable
Shower Caddy Strong, Safe
Hardware Strong, Safe
Order A Custom Cut Glass
- Bulk Buy
- Promotions
- Design Ideas
- Become A Pro Partner
- E-Catalog
- Shower Door
- Glass Table Tops
- Mirrors
- Tempered Glass
- Insulated Glass
- Glass Railing
- Replacement Glass
- Fire Rated Glass
- Pattern Glass
- Tint Glass
- Laminated Glass
- Backsplash
- Glass Boards
- Back Painted Glass
- Crackled Glass
- Frosted Glass
- Plexi & Acrylic Glass
- Storefront Glass
- MirrorViewTM
- Slik Printing Glass
- Glass Shelves
- Others
- 1 Step 1: Take Horizontal Measurements
- 2 Step 2: Take Vertical Measurements
- 3 Step 3: Take Depth Measurements
- 4 What is the standard size for a window?
- 5 Where to Buy High-Quality Replacement Glass?
Share this post
The major and crucial step in window replacement glass is window measurement. People usually ask, “How to measure for replacement windows?” but they do not get satisfied by the answers.
Keeping in view the user problems, Fab Glass and Mirror has opted to enlighten people about measuring the replacement glass for windows efficiently. Read our expert guide on taking the correct measurements for replacement windows and avoid any inconvenience.
The first and foremost thing is to know the size of your window. Taking the accurate and precise measurements of the window you would like to replace is the best thing you can have. So, let’s dig out the measurement guide.

Table of Contents
- 1 Step 1: Take Horizontal Measurements
- 2 Step 2: Take Vertical Measurements
- 3 Step 3: Take Depth Measurements
- 4 What is the standard size for a window?
- 5 Where to Buy High-Quality Replacement Glass?
Step 1: Take Horizontal Measurements
While taking the dimensions of the replacement window, always measure it at three points. It gives a clear insight into whether the window has equal distances or not. Take the horizontal measurements from the top, middle, and bottom.
- Take the measurements of the top side first with the help of measuring tape. Measure from one jamb surface to the other
- Measure from the middle and then the bottom of your window
- Now you have three measurements of your window. Use the smallest measurement as your width dimension.
Step 2: Take Vertical Measurements
You have to repeat the same measuring steps of width measurement while taking vertical dimensions i.e. three measurements vertically (leftmost, middle, rightmost).
- Measure the height distance across the window frame from bottom to top from left, middle, and right of the window from the window sill to the head jamb.
- Just like the width measurement, take the smallest measure of the height while ordering your replacement window.
FYI: What is the subtract factor in window measurements?
You might have heard about subtracting something from the final measurements of windows for glass replacements. That’s rubbish, and don’t ever do this at all. While ordering for glass replacement, only provide the opening size of the window. Just order with the right measurements and let it be the manufacturer’s headache.
Step 3: Take Depth Measurements
Finally, the depth is the last thing of a window to measure for glass replacement. After taking the depth dimensions, you are all set to order a glass replacement for yourself.
- Measure the depth from the inside window trim to the outside blind stop strip.
- Take the dimensions of the depth from several points.
Note: Don’t worry about the pulleys and parting strips while taking depth measurements. All this stuff is removed during window installation.
Rough Opening and Window Size
The rough opening is the opening where the window frame sits. The rough opening measurements are important while choosing a frame size. However, the replacement window size is lesser than the rough opening as the frame has a header, sill, and vertical trimmers.
You Can Take Measurements in Square Feet Too
If the above-given steps don’t make you feel at ease, you may opt to measure the window for glass replacement in square feet.
- Measure (in inches) across the bottom of the window glass
- Measure from bottom to top
- Multiply both readings and divide them by 144 to have the measurements in square feet
Note: The window glass area is calculated by multiplying the length into width.
What is the standard size for a window?
People usually ask for the standard window size. For their information, there is no particular standard measurement of a window. Yes, it’s a sure thing that when you shop for replacement windows, you probably encounter some consistent size dimension windows. These windows are made to fit mostly the rough opening sizes in the home. However, it’s always better to measure your windows and place an order. If you don’t find a pre-manufactured window, you’ll have to go for a custom-cut solution.
Talking about the common window size usually found at home is 24✕36. You can’t take it as a standard size but a common size.
Pro Tip: Fab Glass and Mirror is in favor of performing DIY tasks at home. However, for window measurement, we highly encourage you to get the help of professionals to ensure error-free measurements of your replacement window glass. This step will avoid you from financial loss as well as give you peace of mind.
Where to Buy High-Quality Replacement Glass?
The glass market is very diverse, and you find several types of glass for windows. The important thing is the quality of the replacement glass and its price. At Fab Glass and Mirrors, we offer a wide range of replacement glass of different shapes, sizes, and finishes. Order online a high-quality replacement glass at a reasonable price.
Pakistani by birth, sober by face and childish by acts. Addicted to poetry and mad for traveling. Has great fondness for reading novels and loves the company of friends. I'm Sarim Chaudhary; having a handsome experience of writing blogs and articles on hot topics like politics, business, e-commerce, travelling, and DIY techniques to help elevate the living style and standards of my readers.
Related Posts
Explore all things glass—from stylish table tops and insulated options to tinted and frosted designs. Discover guides on glass railings, custom cut glass, shelves, and stunning backsplash ideas for a modern home or office upgrade.
Muhammad Bilal Custom Cut Glass January 8, 2026 What are Standard Sliding Glass Door Sizes, Width, Dimensions, and Measurements?
What a standard sliding glass door size ought to be is a very valid question to ask, especially when you are in the process of…
Muhammad Bilal Custom Cut Glass December 15, 2025 The Commercial Design Secret of Glass Office Partitions
Glass office partitions have fundamentally redefined the modern commercial landscape. No longer simple dividers, these systems are integral architectural tools,…
Muhammad Bilal Custom Cut Glass December 10, 2025 Glass Partition Walls for Modern Commercial & Residential Builds
Modern commercial and residential construction is no longer defined solely by square footage, it is defined by flexibility, daylight optimization,…
Goto Top- Track your Order
- Product Manuals
- Discount & Coupons
- Your Account
- How to return an item
- Shipping policy
- Over sized item delivery policy
- Contact Us
- Request a Quote
- Template Instructions
- Special Pricing/Wholesale
- Blog
Tag » How To Measure For A Window
-
How To Measure Windows - The Home Depot
-
How To Measure Home Windows In 3 Easy Steps | Modernize
-
How To Measure Your Windows & Doors - YouTube
-
Measure Windows For Replacement - Lowe's
-
How To Measure A Window (for Replacement)
-
How To Measure For Window Replacement | Pella Windows & Doors
-
Tips On How To Correctly Measure A Window - Pella Pressroom
-
How To Measure For Replacement Windows | Pella
-
How To Measure For Replacement Windows And Doors
-
7 Tips For Measuring For Replacement Windows - Bob Vila
-
How To Measure Window For Curtain Rod And Track
-
Measure For Replacement Windows | Window World
-
6 Step Guide To Measuring Old Windows For Replacement