How to Measure for a King Size Mattress


The king size mattress has been the standard of sleep luxury for many years. King size mattresses are the equivalent of two extra-long twin size mattresses pushed together. The standard king mattress is 76 inches wide and 80 inches long. There also is the western, or California, king, which measures 72 inches wide and 84 inches long. Whatever mattress you decide is right for you, first you must make sure it will fit in the room.

Things You'll Need

  • Tape measure
  • Rope or twine
  • Designate where you would like to place your king size mattress within your room. If two people will be using the bed, the center of one wall of the room would be a prime spot. This way each individual can enter and exit the bed without disturbing the other sleeper.

  • Start at a point on the wall and measure 76 inches along the wall. Lay your rope or twine along this line. This segment will be the head of your mattress.

  • Measure 80 inches away from the wall from each end of your first line. This should create an open rectangle. Make sure to measure each lengthwise segment in a straight line toward the opposite wall from the headboard location. Lay your rope along both measured segments.

  • Connect the ends of the lengthwise segments with rope. This segment should measure 76 inches wide. You should now have a 76-inch by 80-inch rectangle outlining the size of the king mattress.

  • Measure to see that each person will have enough room to exit and enter the bed easily. The mattress should not be too close to the wall on either side, which would hinder easy access.

Tips & Warnings

  • When measuring make sure you know what subset of the king mattress you are measuring for. Eastern kings are the standard kings, but California kings are longer in length and shorter in width than the standard king.
  • Make sure to alter your measurements if you're using a headboard or other piece of furniture that would alter the size of your sleeping area.

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