Embarking on a home improvement project often involves measuring for new doors. Whether you're replacing an old door or installing a new one, accurate measurements are crucial for a perfect fit. This guide will walk you through the process, ensuring you get the right dimensions for your new door.
Understanding Door Sizes
Before we dive into measuring, it's essential to understand that doors come in standard sizes, typically measured in three ways:
- Width: The distance from hinge side to latch side.
- Height: The distance from top to bottom of the door slab.
- Thickness (or Stile): The distance from front to back of the door slab.
Measuring for Door Width
Start by measuring the width of your existing door. It's usually the largest dimension. Use a tape measure and record the measurement from the hinge side to the latch side. Standard door widths range from 24" to 36", so your measurement should fall within this range.

Measuring for Door Height
Next, measure the height of your door. This measurement is typically taken from the top of the door slab to the bottom. Standard door heights range from 68" to 80". However, if your door is taller than standard, you may need to order a custom door.
Measuring for Door Thickness
The thickness of a door, also known as the stile, is usually consistent across all door types. Standard door thicknesses are 1-3/8" or 1-3/4". Measure the thickness of your existing door to ensure your new door matches.
Measuring for Door Frame
While you're measuring, don't forget to consider the door frame. The frame should be at least 2" wider and 2" taller than your door to accommodate the door stop and allow for proper installation. If your frame is too small, you may need to replace it as well.

Considerations for Non-Standard Door Openings
If your door opening is not a standard size, you'll need to order a custom door. This could be due to an older home with unique architecture or a recent renovation that changed the size of the door opening. In this case, measure the width and height of the door opening, not the existing door.
Conclusion
Accurate measurements are key to ensuring a proper fit for your new door. By understanding how doors are measured and taking careful measurements of your existing door or door opening, you can ensure a successful installation. Always double-check your measurements and consider consulting a professional if you're unsure.