This advanced calculator helps you understand how the support of your bra is distributed across the underwire. By inputting your bust measurements and the shape of the underwire (e.g., U-shape, J-shape), the calculator models the pressure points along the wire. It provides a visual map showing where the most and least pressure is likely to be exerted, helping you understand the physics of your bra's support.

Understanding underwire pressure is crucial for maximizing comfort, especially for those with larger busts or sensitive ribcages. Uneven pressure distribution can lead to digging, poking, and sore spots. This calculator helps you identify why a certain bra style might be uncomfortable and guides you toward underwire shapes that will distribute weight more evenly, leading to a dramatically more comfortable fit.

The result is a pressure map of your underwire. Areas shown in red indicate high-pressure points, while areas in green are lower pressure. If you consistently experience discomfort in a specific spot, this map can validate your experience. Use this information to shop for bras with different underwire shapes that promise more even pressure distribution, such as those with wider, more cushioned wires or a more ergonomic U-shape.

• If you experience poking on the sides, you may need a bra with a shorter wire or a different wire shape.
• A wider gore is often more comfortable for those with more space between their breasts.
• Look for bras with cushioned underwire channels to help diffuse pressure.
• The pressure map can change based on your posture. Stand up straight for the most accurate mental model.
• Use this tool to understand *why* a bra feels uncomfortable, which is the first step to finding one that feels great.