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How to Calculate Mirror Size?

Published in Mirror Measurement 3 mins read

Calculating the correct mirror size involves accurately measuring the space where the mirror will be installed, taking into account whether the space is square.

Here's a breakdown:

Measuring Your Space

  1. Check for Squareness:
  2. Measure Width:
    • Measure the horizontal distance of the area you want the mirror to cover.
  3. Measure Height:
    • Measure the vertical distance of the area you want the mirror to cover.
  4. Adjust for Levelness:
    • If the area is not level, adjust your measurements to account for any unevenness to make sure your mirror fits correctly.

Determining Mirror Size

  1. Use Measurements Directly:
    • If your area is square, the width and height measurements are the size your mirror will need.
  2. Adjust for Out of Square:
    • If your area isn't square, use the smallest width and height measurement to avoid the mirror sticking out past the available area. This is particularly important if the mirror will be framed.
    • You may consider a custom-cut mirror if you wish to match the outline of your out-of-square area.
  3. Consider Placement:
    • Decide on the precise placement of the mirror. Will it be centered on a wall? Above a sink? Consider any fixtures that might impact the necessary mirror size.
  4. Allow for Framing:
    • If you'll be using a frame, remember to factor in the frame's width. The mirror's dimensions should match the inside dimensions of the frame.
  5. Examples:
    • If your measured space is 36 inches wide and 24 inches high, your mirror should be these same dimensions assuming that your space is square. If it is not, ensure the mirror will fit.
    • If your space is not square, and the vertical measurements range from 23.5 to 24 inches, use the smallest measurement, 23.5 inches, for the height.
    • If you are fitting a mirror to a pre-existing frame that measures internally 36 inches wide by 24 inches tall, your mirror should measure 36 inches wide and 24 inches tall to fit properly.

Important Tips:

  • Measure Twice: Always double-check measurements to avoid errors.
  • Use the Right Tools: Use a level and a reliable measuring tape for accurate results.

By following these steps, you can calculate the mirror size accurately, ensuring a perfect fit for your space.

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