Enter the mainsail hoist (ft) and the mainsail foot (ft) into the Sail Area Calculator. The calculator will evaluate the Sail Area. 

Sail Area Formula

The following two example problems outline the steps and information needed to calculate the Sail Area.

SA = H * F / 2

  • Where SA is the Sail Area (ft^2)
  • H is the mainsail hoist (ft) 
  • F is the mainsail foot (ft) 

How to Calculate Sail Area?

The following example problems outline how to calculate Sail Area.

Example Problem #1:

  1. First, determine the mainsail hoist (ft). 
    • The mainsail hoist (ft) is given as: 40.
  2. Next, determine the mainsail foot (ft). 
    • The mainsail foot (ft) is provided as: 10.
  3. Finally, calculate the Sail Area using the equation above: 

SA = H * F / 2

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

SA = 40 * 10 / 2 = 200.00 (ft^2)


Example Problem #2: 

For this problem, the variables required are provided below:

mainsail hoist (ft) = 60

mainsail foot (ft) = 30

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

SA = H * F / 2 = ?