Enter the span between oarlocks (in) into the Oar Length Calculator. The calculator will evaluate the Oar Length. 

Oar Length Formula

The following two example problems outline the steps and information needed to calculate the Oar Length.

OL = (S/2+2) * 25 / 7 
  • Where OL is the Oar Length (inches)
  • S is the span between oarlocks (in) 

To calculate the oar length, divide the span between oarlocks by 2, add 2 to this result, then multiply by 25 over 7.

How to Calculate Oar Length?

The following example problems outline how to calculate Oar Length.

Example Problem #1:

  1. First, determine the span between oarlocks (in).
    • The span between oarlocks (in) is given as: 15.
  2. Finally, calculate the Oar Length using the equation above: 

OL = (S/2+2) * 25 / 7 

The values provided above are inserted into the equation below and computed.

OL = (15/2+2) * 25 / 7  = 33.92 (inches)

Example Problem #2: 

For this problem, the variables required are provided below:

span between oarlocks (in) = 20

Test your knowledge using the equation and check your answer with the calculator..

OL = (S/2+2) * 25 / 7  = ?