Enter the total span (ft) and the total depth (ft) into the Calculator. The calculator will evaluate the Span To Depth Ratio.

## Span To Depth Ratio Formula

STD = S / D

Variables:

- STD is the Span To Depth Ratio (ft/ft)
- S is the total span (ft)
- D is the total depth (ft)

To calculate Span To Depth Ratio, divide the span length by the total depth.

## How to Calculate Span To Depth Ratio?

The following steps outline how to calculate the Span To Depth Ratio.

- First, determine the total span (ft).
- Next, determine the total depth (ft).
- Next, gather the formula from above = STD = S / D.
- Finally, calculate the Span To Depth Ratio.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

total span (ft) = 50

total depth (ft) = 790