US Flag Size and Proportions Calculator

Your details

Enter the hoist or fly of your flag. All other element dimensions are calculated from this single measurement.
ft
Fly (length)
5.7ft

Overall length of the flag (long side). Ratio B = 1.9 x hoist.

Hoist (height)3ft
Union hoist (C)1.615ft
Union fly (D)2.28ft
Stripe width (H)0.231ft
Star diameter (G)0.1848ft
Star vertical gap (E)0.1615ft
Star horizontal gap (F)0.19ft
Fly (length)5.7
Hoist (height)3
Union fly2.28
Union hoist1.615
Stripe width0.231

Flag dimensions: 3.00 ft x 5.70 ft (ratio 10:19)

  • Your flag is 3.00 ft tall and 5.70 ft long, matching the official 10:19 hoist-to-fly proportion from Executive Order 10834.
  • The blue canton (union) covers the upper-left 1.615 ft in height, spanning all 7 top stripes.
  • Each of the 13 stripes is 0.231 ft wide, alternating 7 red and 6 white from top to bottom.

Next stepCheck the proportions table below for all 8 official element ratios. For outdoor residential use, a 3 ft x 5 ft flag on a 20-25 ft pole is the most common choice.

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