American Flag Size & Proportions Calculator

Calculate the size of the flag of the United States given the desired width or length. The calculator also shows the size and position of the Union, stars, and stripes that meet the standard dimensions for the American flag.

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Flag Dimensions

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Element Dimensions & Positioning

standard proportions of the flag of the United States
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See the proportions for each element in the table below.


How to Calculate the Size of the Flag of the United States and the Elements on It

The size and proportions of the American flag and the elements on it such as the Union, stars, and stripes are governed by executive order 10834 dated August 21, 1959. Signed by Dwight David Eisenhower, the executive order sets standard dimensions for the flag and standard proportions and positions for the flag elements.

While this order defines standards for the size of the flag used by government agencies, the size of flags for personal use may vary. A 3′ × 5′ flag is the most common size for personal use.

To find the size of the flag or a part of the flag, multiply the proportion for the element from the table below by the desired width, or hoist, of the flag.

Standard Proportions for the Flag of the United States

The graphic and table below show the proportions of the flag and its elements.


standard proportions of the flag of the United States
Standard proportions of the flag of the United States, as defined by Executive Order 10834
Standard Proportions
Hoist (Width) of Flag Fly (Length) of Flag Hoist (Width) of Union Fly (Length) of Union Diameter of Star Width
of Stripe
1.0 1.9 0.5385 (7/13) 0.76 0.054 0.054 0.063 0.063 0.0616 0.0769 (1/13)
A B C D E F G H K L