Clothing & Wearables calculator
What Underwear Size Do I Need?
Find underwear sizing measurements from waist circumference and hip circumference.
Enter your measurements
What Underwear Size Do I Need? Measure waist circumference and hip circumference first. This tool converts them into underwear sizing measurements so the recommendation stays tied to your actual dimensions or specification.
- Waist circumference — Required
- Hip circumference — Required
Underwear sizing measurements
Enter the measurements above to calculate underwear sizing measurements.
How the calculation works
The engine follows this rule: Return waist and hip circumference; final underwear size is the smallest brand size whose chart accommodates both measurements.. It returns underwear sizing measurements from the configured inputs.
Worked example
Example: Waist circumference = 86 cm; Hip circumference = 98 cm. Result: Use this measurement profile with the exact current manufacturer, brand or governing-body chart; no universal labelled size is assumed.
Before you decide
Use the finished, usable dimensions after trim, handles, skirting, packaging or other projections where relevant. Use the current manufacturer, brand, league or governing-body specification for the final labelled size or rule; those external charts can change and are not treated as universal constants. For what underwear size do i need, the limiting result on this page is underwear sizing measurements.
Runtime-specific source required. Use the exact current manufacturer, brand, model, regional conversion, league or governing-body chart/rule that applies to the user's actual product or competition; a single static URL would be misleading.
Frequently asked questions
What does the Underwear Size calculator tell me?
It returns underwear sizing measurements from the measurements entered on this page. The calculation is specific to underwear size, so the result should be compared with the exact product or specification you are considering.
Which measurements should I take for underwear size?
Measure waist circumference, hip circumference. Use clear, usable dimensions rather than nominal room or product labels.
Why doesn't the calculator force a universal underwear size size label?
Because labelled sizing varies between brands, models, leagues or governing bodies. The tool returns the measurements or requirements needed to make a reliable chart comparison.