How to Measure a Door to Replace

Are you looking to replace an old door at your house but don’t know how to measure its size? This can be a tricky and overwhelming task, as many typical doors are not only irregular size but also may have great variations in materials used for their construction. Whether you’re replacing an exterior or interior door, it’s essential that the new one fits accurately and provides ample security against possible intrusions. Fortunately, there are simple-to-follow steps that will help guarantee your replacement project is successful! Read on to learn exactly how to measure a door to replace.

How to Measure a Door to Replace

If your door is looking worn, out-of-date, or just plain boring, it might be time to replace it. Not only can a new door increase the overall look and feel of a room but it also bring in more natural light and better ventilation. But before you buy a new door, you’ll need to measure for an accurate fit. Finding the right measurements to replace an existing doorway will save you time, money, and energy!

How to Measure a Door to Replace in 7 Easy Steps

Step 1: Measure the Width of the Door

The very first step is to measure the width of the door. This is best done with a tape measure, and make sure that you double-check your measurements for accuracy. Be careful to measure from the jamb (the vertical part of the frame) to the opposite jamb, as this will give you a truer width measurement.

Step 2: Measure the Height of the Door

Next, you will need to measure the height of the door. This can be done by measuring from the top of the door frame to the bottom. Make sure that you measure twice to check for accuracy. Also, it’s important to note that the measurement should include any additional frames or trim that may be present.

Measure the Height of the Door

Step 3: Measure the Depth of the Door

The depth of a door is important when replacing it. To properly measure the depth, use a ruler and measure from one side of the door to the other. Make sure that you measure twice for accuracy. You have to be careful when measuring for depth as it is easy to miss small details that could affect the size of the new door.

Step 4: Measure the Thickness of the Door’s Frame

The thickness of a door frame can vary, so it’s important to get an accurate measurement. You can do this by measuring from one side of the frame to the other and also make sure that you double-check your measurements.

Step 5: Measure the Height of the Door Handle

The door handle can be tricky to measure because it’s often hidden behind the trim. To properly measure the height, use a ruler and measure from the top of the handle to the bottom. You have to make sure that you measure twice for accuracy.

Step 6: Measure How Far Out From The Frame Is The Door Knob

To measure how far out from the frame is the doorknob, use a ruler and measure from the center of the door knob to the edge of the door frame. Make sure that you double-check your measurements for accuracy.

Step 7: Measure How High Is The Door Knob From The Floor

The last step in measuring a door is to measure how high the door knob is from the floor. To do this, use a ruler and measure from the bottom of the door handle to the floor. Make sure that you double-check your measurements for accuracy.

Once you have finished measuring all these elements, you will be ready to buy and replace your new door. Make sure you double-check your measurements again before making any purchases. This will ensure that you get the correct door for your home. Good luck!

Use Steel Tape to Measure

Some Additional Tips to Measure a Door to Replace

1. Use Steel Tape to Measure

This is very important when measuring a door for replacement. A steel tape measure provides the most accurate measurements and should be used to ensure a tight-fitting door is achieved. It will also help to prevent any gaps between the door and frame when installed.

2. Check the Jamb

Before measuring, you should make sure that the jamb (the surrounding frame of the doorway) is in good condition with no major damage or defects that could affect the installation of a new door. Make sure you check the jamb before buying your new door to avoid any issues.

3. Measure Both Sides

Before you measure, you should determine which side requires replacement so that you can ensure accuracy when measuring both sides. This will help avoid any issues with the fit or look of the door after installation.

4. Take Multiple Measurements

It is important to take multiple measurements at various points along the door and jamb when taking measurements. This will ensure that you have a complete picture of the size of the doorway when selecting a new door for replacement.

Take Multiple Measurements

5. Measure From the Floor

When measuring, it is best to start from the floor up as this will provide more accurate measurements than if you measure from the ceiling down. This will also help you get an accurate measurement of the height of the door.

6. Consider Finished Measurements

Take into account any finished measurements, such as trim or moldings, that may need to be taken off and put back on when installing a new door. These should all be accounted for in your measurements to ensure an exact fit.

7. Double Check Measurements

Before purchasing a new door, double-check your measurements to ensure they are correct and that the new door will fit correctly in the space. This final step can help avoid any issues or frustration with installation.

By following these tips and taking accurate measurements, you can ensure that you select the perfect door for replacing your old one. With a new door, you can create a stylish and functional space in your home that will last for years to come.

Frequently Asked Questions

How Much Does It Cost to Replace a Door?

The cost of replacing a door will depend on the size and material of the door that you choose. Generally, basic interior doors can range from $100-$400 dollars, with exterior doors typically costing more than interior doors. The installation fee for a new door can also vary widely depending on the type of door and the complexity of the installation process. Make sure to get multiple quotes from different suppliers to get an accurate estimate for the cost of your door replacement.

What Materials Can I Use to Replace a Door?

The materials you can use for door replacement will depend on the installed door type. Common materials used for interior doors include solid wood, hollow core, and composite. Exterior doors are typically made from fiberglass, steel, or wood. Be sure to research the pros and cons of each material before making your final decision.

What Is the Best Way to Measure a Door to Replace?

The best way to measure a door to replace is by measuring the width, height, and depth of the existing door. It’s important to use a level when taking measurements so that you get an accurate reading. You may also need to measure the area around the existing door to ensure that the new door will fit. Additionally, you may want to measure the frame of your existing door to purchase a perfect pre-hung replacement.

How Long Does It Take To Replace a Door?

The amount of time it takes to replace a door will depend on the type of door, the installation process, and the experience level of the person doing the work. Generally, replacing an interior door should take between 1-2 hours, while replacing an exterior door can take longer. If you choose to hire a professional to replace your door, they may be able to provide a more accurate estimate of how long it will take.

Depend on the Type of Door


In conclusion, replacing a door can seem like a daunting task, but with the right tips and instructions, anyone can do it. Knowing how to measure a door is essential to accuracy; taking measurements from all angles ensures you have enough width and height and clearance for hinges in all four directions. Familiarizing yourself with the size requirements for standard interior doors versus exterior doors will help you determine what size replacement door you need. Don’t forget about the threshold!

We hope this guide on how to measure a door to replace has been helpful and that it will give you the confidence to take on this project. Lastly, remember that you may need tools and assistance when attempting to replace your door. With diligence and patience, measuring for the correct replacement door just became easier than ever before. Thanks for joining me on this exploration of how to measure a door—I hope it leaves you feeling confident to tackle this project head-on.

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Adrian Green

Adrian has been interested in woodworking since he was a child. His father had a woodworking shop, and Adrian would help him out and learn from him. He gained basic carpentry knowledge as well as an understanding of how to work hard and take care of business. He enjoys woodworking as a hobby. He loves the feeling of creating something with his own hands, and the satisfaction that comes from seeing his finished products used by others. So he started this blog to spread his passion and knowledge to those interested in DIY wood-working projects. He knows that with a little guidance and practice, anyone can create beautiful pieces of furniture or décor from scratch.

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