Flag Calculator | USA
Calculate proper dimensions for the US flag based on official proportions. Get accurate measurements for flag width, height, union (canton), and stripes.
How to Use This Calculator
- Enter the desired flag width.
- Select your unit (feet, inches, or centimeters).
- The calculator displays flag height, union dimensions, and stripe height.
- Use this to create US flags with proper official proportions.
US Flag Proportions Formula
US flag dimensions follow official proportions:
Height = Width / 1.9
Union Width = Width × 0.5385
Union Height = Height × 0.5385
Stripe Height = Height / 13
Stripes: 13 total (7 red, 6 white)
Stars: 50 stars in the union
Example: 3-foot wide flag: Height = 3 / 1.9 = 1.58 feet. Union width = 3 × 0.5385 = 1.62 feet. Union height = 1.58 × 0.5385 = 0.85 feet. Stripe height = 1.58 / 13 = 0.12 feet. These proportions are specified in US Flag Code and ensure proper flag design.
Full Description
The Flag Calculator | USA calculates proper dimensions for the US flag based on official proportions specified in the US Flag Code. The US flag has specific proportions that must be maintained for proper design: width to height ratio of 1.9:1, union (canton) dimensions of 0.5385 × flag dimensions, and 13 equal stripes (7 red, 6 white).
The calculator uses the official US flag proportions: Width:Height = 1.9:1 (the flag is 1.9 times wider than tall). The union (blue field with stars) is 0.5385 × flag width by 0.5385 × flag height (about 53.85% of flag dimensions). The 13 stripes are equal in height, with each stripe height = flag height / 13. These proportions ensure proper flag design regardless of size.
This calculator helps you create US flags with proper dimensions. Enter flag width and unit, and it calculates height, union dimensions, and stripe height. Use it for flag design, flag making, understanding US flag proportions, or creating flags of any size. Always follow US Flag Code guidelines for proper flag design and display!
Frequently Asked Questions
What are the official US flag proportions?
US flag proportions: Width:Height = 1.9:1 (flag is 1.9 times wider than tall). Union (canton) width = 0.5385 × flag width. Union height = 0.5385 × flag height. Stripes: 13 alternating red and white (7 red, 6 white). Stars: 50 stars arranged in rows. These proportions are specified in US Flag Code.
How is the union (canton) sized?
The union (blue field with stars) is 0.5385 × flag width by 0.5385 × flag height. This means the union is about 53.85% of the flag's width and height. The union always maintains this proportion regardless of flag size. Example: 3-foot wide flag = 1.62-foot wide union.
How are the stripes sized?
The 13 stripes (7 red, 6 white) are equal in height. Each stripe height = flag height / 13. The stripes run the full width of the flag (except where covered by the union). The top and bottom stripes are always red. Example: 3-foot tall flag = 0.23-foot stripe height.
Can I use this for flag design?
Yes! The calculator provides accurate dimensions for US flag design. Use it to create flags of any size while maintaining official proportions. Essential for flag makers, designers, or anyone creating US flags. Always follow US Flag Code guidelines for proper flag design and display.