Things you will need.
How to measure a mattress.
How to measure bed height.
Measure from the bottom of the foundation not the floor to the top of the mattress.
Remove all bedding from your mattress including sheets pads and foam toppers so you can accurately measure the depression.
If necessary repeat for box spring.
Measure the width and the length of the mattress from one outer edge to the other outer edge that is from left seam to the right seam for width and from top head to the bottom foot for the length.
Measure in inches from the bottom where it rests on the box spring to the top of the mattress including any pillow top.
The top is the very crown highest point of the mattress.
Make sure your mattress is bare while taking the measurement.
Make sure the ruler or tape measure flat on the mattress.
Measure from the left side to the right side of your mattress to get the width.
You may ask a friend to help you hold the measuring tape if it does not lock into place step 3 keep a pen and paper nearby to write down the measurements for future reference.
If you only measure up to the upper seam the actual bed height could be off by as much as 3 inches.
Measure the width in inches of the mattress from side to side.
Alternatively you can measure a space in your house to see what size bed will fit comfortably.
You will be able to use these measurements to see what type of bed you have in the next step.
Any extra materials on top of the mattress may alter your results or make it.
How to measure mattress sag in 5 steps.
Measure the length in inches from the head of the mattress to the foot of the mattress.
String broom or yardstick.
Place the end of the tape so it touches the bottom of the sagging portion of your mattress alongside the string.
People often assume the upper seam is the top of the mattress it s not.
Pull the steel measuring tape so it extends a few inches from its housing.
You will want to measure it from the exact edge step 2 grab a retractable measuring tape.
Mattresses can curve outward on the sides so make sure you re measuring from the widest point on each side of the mattress.
Use a tape measure or fabric ruler to do your measuring.
See the diagram below for a handy visual reference you re on a tight budget.
If necessary repeat for box spring.
Painter s tape only needed if string is used measuring tape or ruler any type of measuring tape can be used but a stiff type such as steel measuring tape is preferable step 1.