Find Your Perfect Condom Size Instantly!
Our free condom calculator helps you find the ideal condom size based on your measurements. Whether you're looking for a snug fit or more comfort, this calculator is data-driven, fast, and 100% private.
How It Works
1. Input Your Measurements
Enter your girth (circumference) in cm or inches.
2. See Recommendations
Pick a data source—condom-sizes.org or Dstats—and get tailored nominal width recommendations.
3. Compare Sizes
See how recommended condom nominal widths compare across brands.
Condom Size Calculator
Measurements are processed on your device and aren't stored.
Recommendations are based on nominal width mappings from condom-sizes.org and the Dstats database. We prioritize condom width over length for fit. Learn more about our methodology.
Why Condom Size Matters
Better Comfort
The right size allows you to focus on the moment, not on uncomfortable feeling.
Higher Safety
Properly fitting condoms have a lower risk of slipping or tearing.
Optimal Protection
A proper fit ensures better protection against STDs and unwanted pregnancies.
How to Measure Yourself for the Perfect Fit
- Penis Circumference (Girth): Use a flexible measuring tape or a strip of paper. Wrap it around the thickest part of your erect penis and note the measured value. This is your circumference.
Once you have this value, enter it into our calculator to determine the ideal condom size. We focus on condom width, as this is more important for fit than length.
Common Mistakes When Choosing a Condom
- Measuring while not fully erect. Circumference changes significantly with arousal. Always measure at full erection for an accurate fit.
- Measuring at the wrong spot. Measure around the thickest part of the shaft, not the tip or base, for the most relevant circumference reading.
- Confusing diameter with circumference. Condom sizing uses circumference (the full distance around), not diameter. Divide by π only if you have a diameter measurement.
- Over-prioritizing length over width. Most condoms are long enough for the vast majority of people. Nominal width (the flat measurement) is what determines comfort and safety.
Frequently Asked Questions
Condom size is primarily about nominal width — the flat width of a condom when laid unrolled. Nominal width correlates directly to girth and determines both comfort and safety. Length matters far less for fit.