How to Measure for a New Door & Frame

Installing a new door is a common homeowner project. You can upgrade exterior doors to improve energy efficiency or swap out interior doors to change the style of your décor. When installing a new door, you may need to change out the door frame. Exterior doors may come pre-hung; this means the door has a frame attached to it and is ready for installation. Interior doors do not usually come like this, although you may be able to find them at a local hardware supply center.

Things You'll Need

• Tape measure

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Instructions

1. • 1

     Measure the width of the rough door opening at the top and bottom of the door. Use a tape measure and measure from one two-by-four to the other.

   • 2

     Take measurements for length by measuring from the top of the door opening to the bottom of the door opening. Measure both sides to ensure the figures are the same.

   • 3

     Lay the old door flat on the ground. Use the tape measure to measure the length and width of the door.

   • 4

     Round the length and width measurements for the door to the next highest inch.