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Flag Calculator | USA

Flag Calculator | USA

Calculate proportions for the United States flag

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How it works: Enter the flag's width and height to get recommended star size, stripe width, and union size based on official US flag proportions.

Tips

  • US flag ratio is 1.9:1 (width:height)
  • Union (blue field) width = 0.76 × height, height = 7/13 × height
  • Star diameter = 0.0616 × height, stripe width = 1/13 × height

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