How to Mitre Cut-Wood Molding

Written by alex smith
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How to Mitre Cut-Wood Molding
The door frame above is an example of mitre design. (white door 2 image by Guy N. from

Most homes feature some sort of wood moulding, either on the walls along the floor and ceiling, or framing doors and windows. Almost all of these mouldings will meet at 90-degree angles in corners after the ends of the moulding pieces receive a mitre cut--a 45-degree cut that, when butted against another mitre cut, forms the full 90-degree angle. With the proper tools, making these cuts is quite easy. The tools do the work for you.

Skill level:

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Things you need

  • Mitre saw or mitre box and hand saw
  • Pencil
  • Tape measure

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  1. 1

    After measuring the moulding to make sure it's the right length, mark the cut line with a pencil.

    How to Mitre Cut-Wood Molding
    An example of a mitre cut, with the cut line at the inner corner by the white section. (picture frame corner image by Jim Mills from
  2. 2

    Set the mitre saw to a 45-degree angle.

  3. 3

    Set the moulding into the saw and cut the end of the moulding off, following your cut line.

  4. 4

    Measure and mark the second piece of moulding.

  5. 5

    Set the mitre saw to the opposite 45-degree angle and cut the end of the moulding off, following your cut line. If your mitre saw allows only a single 45-degree angle, turn the moulding upside down to get the opposite angle in your cut.

  6. 6

    Hold the two pieces of wood together to complete a 90-degree angle.

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