Convert center of gravity location to percent mean aerodynamic chord and convert percent MAC back to CG location. This free aviation calculator helps with aircraft design study, stability analysis, and advanced weight and balance work.
Use either method below. You can convert a center of gravity location into percent MAC or convert percent MAC into a CG location.
This calculator is especially useful when center of gravity is expressed as a percentage of MAC rather than as a direct station location.
Percent MAC expresses center of gravity position as a percentage of the mean aerodynamic chord. Instead of describing CG only as a station number, %MAC shows where the CG falls along the aerodynamic reference chord.
This is commonly used in transport-category aircraft, aircraft design, certification work, and advanced weight and balance discussions because it creates a standard way to compare CG position.
LEMAC is the leading edge of the mean aerodynamic chord. It is a reference location used when expressing center of gravity as a percentage of MAC.
Percent MAC gives a normalized way to describe CG location, which is especially helpful for aircraft design and comparing loading positions.
Mathematically yes, depending on the numbers entered. In practical aircraft loading, acceptable values depend on the aircraft’s approved CG range.
No. It converts between station and %MAC, but you must compare the result against approved aircraft-specific CG limits.