Again the tape measure should be in a straight taut line even with the top of the bed.
How to measure your truck bed for a tool box.
Measure the outside distance between your bed rails and compare it to measurement a on the illustration above.
Using the picture of the low side box above and the instructions below measure your truck bed to insure proper fit.
Divide the number of inches by 12 to determine the length of your truck bed in feet.
Your best bet to get an accurate measurement is to not place the tape measurer on the bottom part floor but simply run it straight down the length.
Measure the inside length of your bed from inside the front bulkhead rail to the inside of your tailgate compare that measurement with dimension a in the illustration.
Record this measurement and label that number width.
For this number measure how tall your truck bed is from the floor to the top of the rail.
Hold one end of your tape measure against the inside of your truck bed s left front corner and have someone pull the tape measure until it reaches the inside of the front right corner.
To measure the length of a truck bed you should start at the bulkhead and measure right up to the inside of your tailgate.
How to measure your truck bed for a crossover tool box using the picture of the crossover box above and the instructions below measure your truck bed to ensure proper fit.
Now you have the measurements of your truck bed.
Record the measurement in inches.
Just make sure to keep it even and not move it away from the bulkhead.
This measurement will let you know the maximum height of your toolbox.
For crossover toolboxes be sure to properly measure the distance from the outside of one rail to the outside of the other.
And measure the distance from the top to the bottom of the bed.
If you are going to buy the accessory like toolbox or tonneau cover truck caps then change the dimensions accordingly like in the metric system in feet or inches.
Most standard boxes won t extend all the way to the floor but some oversized tool chests might be taller than your bed and won t fit properly.