Buttonhole Spacing Calculator

Stop struggling with the math. Enter your placket length and number of buttons to get exact center-to-center spacing. See a live diagram of your buttons and save your projects for later.

Dimensions

Margins (to Center)

Why Use This Tool?

  • **Visual Placket:** See a live diagram of your buttons to check the proportions.
  • **Perfect Math:** Calculates exact center-to-center spacing instantly.
  • **Project History:** Save your calculations (e.g., "Summer Shirt") to your browser.
  • **Printable Guide:** Download a PDF list of measurements to take to your worktable.
  • **Shareable:** Generate a link to send this specific spacing layout to anyone.

How to Use It

  1. 1. **Enter Details:** Select your unit, placket length, and number of buttons.
  2. 2. **Set Margins:** Enter the distance from the Top and Bottom edge to the *center* of the first/last button.
  3. 3. **Visualise:** Check the diagram to ensure the spacing looks right.
  4. 4. **Mark:** Use the generated list to mark your fabric.
  5. 5. **Save/Export:** Save the project or download a PDF guide.

Frequently Asked Questions

Do I measure from the edge or the seam?

Measure the *finished* length of the placket (after hemming/facing). The calculator assumes the "Top Distance" is from the finished top edge to the *center* of the first button.

How do I use the "Button Size" option?

Entering the button size helps the visualizer draw accurate circles, so you can see if they look too big or small for the spacing. It does not change the center-to-center math.

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