📏 Blade Length Converter
Convert a blade length between inches, centimetres, and millimetres in one step — perfect for comparing specs, checking carry limits, and matching sheaths and storage.
🔄 Inches, Centimetres, Millimetres
What is a Blade Length Converter?
It turns a blade measurement in one unit into another instantly. Knife specs are quoted in inches in some catalogues and centimetres or millimetres in others, so a quick converter makes it easy to compare two knives, match a blade to a sheath or knife roll, or check a length against a carry limit.
Enter the length, pick the unit you have and the unit you want, and it does the maths — converting through millimetres with exact factors and rounding to two decimals.
❓ Frequently Asked Questions
How is blade length measured?
Blade length is normally measured in a straight line from the tip to where the sharpened edge meets the handle or bolster — not along the curve. Makers vary slightly in where they stop, so a stated length is a close guide rather than an exact standard.
Why does blade length matter for legal carry?
Many places set knife-carry rules by blade length, and the limits are often quoted in inches or centimetres depending on the country. Converting cleanly between units helps you check a knife against the local threshold — but always confirm the exact wording of the law where you are, since definitions and exceptions differ.
How precise is the conversion?
It converts through millimetres using exact factors (1 in = 25.4 mm) and rounds the result to two decimal places, which is well within the tolerance you'd ever measure a blade to by hand.