Bra Size Estimator Calculator

📖 Overview

Estimate bra size from underbust and bust measurements with a fit preference control.

The model provides a direct band-cup recommendation plus sister sizes for practical fitting alternatives.

Use this tool as a structured starting point before final in-person fit checks.

It helps reduce trial-and-error purchases by making assumptions transparent.

Use these default and higher-pressure example inputs to explore how sensitive this calculator is before using your real numbers.

Input	Base Case	Higher Pressure Case
Underbust (in)	32	36.8
Bust (in)	35	40.25
Fit Code (1 firm 2 regular 3 comfort)	2	2.3

This calculator applies a direct math model based on the inputs above.

💡This calculator is scenario-based. Better input quality leads to better decision quality.

Input	Example Value
Underbust (in)	32
Bust (in)	35
Fit Code (1 firm 2 regular 3 comfort)	2

Use this tool when you need a fast decision during active planning or execution.
Use this before committing money, time, or tradeoffs that are hard to reverse.
Use this to compare options using the same assumptions across scenarios.

Results can be misleading if key inputs are missing, stale, or unrealistic.
Very small or very large values may amplify rounding effects and interpretation risk.
If assumptions change mid-decision, recalculate before acting.

💡 Validate units before comparing scenarios.

💡 Run multiple values to understand sensitivity.

💡 Use outputs as estimates, not guarantees.

❓ Is this output exact?

It is a fast estimate based on provided inputs and model assumptions.

❓ Can I compare different scenarios?

Yes, this tool is designed for quick side-by-side checks.