Quick answer: Convert inches to centimeters by multiplying by 2.54; convert centimeters to inches by dividing by 2.54. Enter circumference, your maker’s ear-to-ear route, and front-to-back measurement below. This tool converts units only; it does not recommend a wig size.
Enter one or more measurements, choose their current unit, then select Convert.
Manual fallback: If JavaScript is unavailable, use the formula above. For example, 21 inches × 2.54 = 53.34 centimeters. The tool rounds displayed conversions to one decimal place; keep your original tape reading for comparison.
Use the result with the right chart
Measurement routes vary. Follow the route in the exact wig maker’s instructions, and compare all three results with that maker’s chart. Do not compare a head measurement with a frontal or closure panel dimension. See the Jon Renau chart example, the head-measurement worksheet, or our product fit record.
Privacy: This page performs the conversion in your browser. It does not send or save the numbers.
