2D:4D Ratio Calculator

Educational finger digit ratio analysis tool

Finger Length Calculator

What Does This Mean?

⚠️ Important Disclaimer

This is NOT a medical diagnostic tool. The 2D:4D ratio reflects prenatal hormone exposure during fetal development, not your current hormone levels. This tool is for educational purposes only.

Key Scientific Facts

  • 2D:4D ratio reflects prenatalHormone concentrations during pregnancy supporting fetal and maternal health.
    learn more     hormone exposure, not current levels
  • Ratio is established during fetal development and remains constant
  • Lower ratios (shorter index finger) indicate higher prenatal testosterone
  • Higher ratios (longer index finger) indicate lower prenatal testosterone
  • No reliable correlation exists between 2D:4D and adult hormone levels

Typical Hormone Ranges

Reference Only - NOT derived from your finger ratio

These are typical adult hormone ranges. Actual hormone levels can only be determined through blood tests.

Testosterone Levels

Gender Range (ng/dL) Typical (ng/dL)
Male 300 - 1000 450 - 600
Female 15 - 70 20 - 40

Estradiol Levels

Gender Range (pg/mL) Typical (pg/mL)
Male 13 - 42 20 - 35
Female 60 - 450 100 - 250

How to Measure Your Fingers

Step-by-Step Instructions

  1. Use your right hand - Right hand ratios may be more sensitive to prenatal hormones
  2. Measure from palm side - From fingertip to the midpoint of the bottom crease
  3. Use precise units - Millimeters or inches provide better accuracy
  4. Take multiple measurements - Measure several times for consistency
  5. Keep fingers straight - Ensure fingers are fully extended during measurement

Tips for Accurate Measurement

  • Measure from palm-side finger tip to midpoint of bottom crease
  • Use millimeters or inches for accuracy
  • Take measurements multiple times for consistency
  • Right hand ratios may be more sensitive to prenatal hormones

Medical Disclaimer

This calculator is for educational and research purposes only. It is not intended to diagnose, treat, cure, or prevent any disease or medical condition. The 2D:4D ratio is a measure of prenatal hormone exposure and does not reliably predict current hormone levels. For accurate hormone testing and medical advice, please consult with a qualified healthcare professional.

AI Disclaimer

This calculator was entirely made by Perplexity AI with only subtle tweaks. Here's a link to the thread: perplexity.ai/search/what-is-a-2d-4d-ratio