Remove all bedding from your mattress including sheets pads and foam toppers so you can accurately measure the depression.
How to measure a mattress.
See the diagram below for a handy visual reference you re on a tight budget.
Use a tape measure or fabric ruler to do your measuring.
Alternatively you can measure a space in your house to see what size bed will fit comfortably.
If you only measure up to the upper seam the actual bed height could be off by as much as 3 inches.
Measure from the bottom of the foundation not the floor to the top of the mattress.
Make sure the ruler or tape measure flat on the mattress.
Step 1 strip the bed of all bedding.
Mattresses can curve outward on the sides so make sure you re measuring from the widest point on each side of the mattress.
You will be able to use these measurements to see what type of bed you have in the next step.
Measure the length in inches from the head of the mattress to the foot of the mattress.
The top is the very crown highest point of the mattress.
If necessary repeat for box spring.
Pull the steel measuring tape so it extends a few inches from its housing.
Measure from the left side to the right side of your mattress to get the width.
How to measure mattress sag in 5 steps.
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.
String broom or yardstick.
Make sure your mattress is bare while taking the measurement.
Always measure the distance from the floor to the top of the surface on which you will place the mattress so you know what you re getting into.
If necessary repeat for box spring.
Measure in inches from the bottom where it rests on the box spring to the top of the mattress including any pillow top.
How to measure bed height.
People often assume the upper seam is the top of the mattress it s not.
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.
You will want to measure it from the exact edge step 2 grab a retractable measuring tape.
Any extra materials on top of the mattress may alter your results or make it.
Things you will need.