This tool helps you calculate the dimensions of a US flag based on the standard ratio.

**How to use the calculator:**

To use this calculator, simply enter the desired hoist (height) and fly (width) dimensions of the US flag. Then, click on the **Calculate** button to see the calculated parameters based on standard flag proportions.

**Explanation:**

The dimensions of a US flag are based on standardized ratios. By entering the hoist and fly dimensions, this calculator computes the following parameters:

- Union Height: 7/13 of the flag’s hoist.
- Union Width: 2/5 of the flag’s fly.
- Stripe Width: 1/13 of the flag’s hoist.

**Limitations:**

Please note that the input values should be positive numbers, and the computed results will only be accurate if the input maintains the fly-to-hoist ratio specified by the US flag standard (1.9:1).

## Use Cases for This Calculator

### 1. Calculate the Area of the US Flag

To determine the area of the US flag, you will multiply its length by its width. Input the measurements in feet or any desired unit to get the total area. This calculation is essential for ensuring the flag fits properly on display surfaces.

### 2. Find the Perimeter of the US Flag

Calculating the perimeter of the US flag involves adding the lengths of all its sides together. This is crucial for knowing the exact length of materials needed for framing or hanging the flag securely.

### 3. Determine the Aspect Ratio of the US Flag

Aspect ratio defines the proportional relationship between the length and width of the US flag. To find the aspect ratio, divide the length by the width. This information helps maintain the proper visual appearance of the flag when reproducing its design.

### 4. Scale the US Flag Size

Scaling the size of the US flag allows you to adjust its dimensions while preserving the original aspect ratio. You can enlarge or reduce the flag’s size by a certain percentage to fit specific requirements without distorting its design.

### 5. Calculate the Diagonal Length of the US Flag

Measuring the diagonal length of the US flag helps in determining the distance between opposite corners. This calculation is useful for ensuring the flag fits diagonally across a space or diagonally displayed objects.

### 6. Calculate the Flag’s Area in Square Yards

To convert the US flag’s area to square yards, divide the total area by 9 since 1 square yard equals 9 square feet. This conversion is beneficial when working with measurements in square yards for projects or events.

### 7. Determine the Flag’s Area in Square Meters

For international use, converting the US flag’s area to square meters requires dividing the total area by 10.764 since 1 square meter equals 10.764 square feet. This conversion is crucial when dealing with metric measurements.

### 8. Evaluate the Flag’s Area in Acres

Converting the US flag’s area to acres involves dividing the total area by 43,560 since 1 acre equals 43,560 square feet. This calculation helps visualize the flag’s size in terms of land measurement units.

### 9. Calculate the Width from a Given Length and Aspect Ratio

To determine the width of the US flag from a specified length and aspect ratio, divide the length by the aspect ratio. This calculation is handy for maintaining the correct proportions when designing or resizing the flag.

### 10. Calculate the Length from a Given Width and Aspect Ratio

To find the length of the US flag from a provided width and aspect ratio, multiply the width by the aspect ratio. This calculation is essential for ensuring the flag’s design remains consistent when altering its dimensions.