About KnotWorks

A knot is simple to look at and easy to get wrong. The difference between a hitch that holds and one that slips isn’t always obvious until it’s under load, and the arithmetic behind a rope-craft project — how much rope to buy, how much paracord a bracelet needs, how many tucks a splice wants, how much twine a whipping takes — is easy to guess at and easy to get wrong too. KnotWorks exists to make both the knowledge and the math easy to get right the first time.

Rather than long articles you have to read end to end, the site is built around a handful of small, single-purpose calculators, each aimed at one decision. The Rope Length Estimator adds a per-knot allowance and a waste margin to your run length across however many pieces you need, so you buy enough rope on the first trip. The Knot Selectorfilters a curated list of real, named knots down to the ones suited to your actual use case — sailing, climbing and rescue, decorative and Chinese knotting, fishing, general utility, or camping. The Working Load Limit Guide turns a rope’s rated breaking strength and a design factor into a general educational working-load figure — guidance for understanding the math, not a safety certification. The Paracord Needed Calculator works out how much 550 cord a Cobra, King Cobra, or Fishtail bracelet or lanyard needs from its finished length. The Splice Tuck Counter recommends a tuck count for a 3-strand eye splice, or a bury length for double-braid, and the extra rope either will consume. And the Whipping Length Calculator works out the wraps and twine needed to bind a rope end from the rope’s own circumference.

Beyond the calculators, the blog and learn section cover knot-tying basics, splicing and whipping, paracord crafts, rope care and selection, sailing and rigging, and climbing and rescue knots, and the Knots & Ropework Museum is a browsable collection of sailor and maritime knots, climbing and rescue knots, decorative and Chinese knotting, and fishing knots, with every entry, image, and fact drawn from Wikipedia and Wikimedia Commons.

A few things worth stating plainly. KnotWorks is an independent site, not affiliated with any rope or cordage manufacturer, climbing organization, or sailing association. It is supported by advertising, which is how the tools stay free with no account required. Every result the tools produce — a rope length, a knot suggestion, a working-load figure, a paracord amount, a tuck count, a twine length — is a general estimate built on the numbers you enter and on common craft and rigging conventions, not a professional certification. In particular, the working-load-limit guide is educational only: for anything overhead, life-safety, or load-bearing on a person, use manufacturer-rated hardware and a qualified rigger, not a website calculator. If a tool result looks off, or there’s a calculator you wish existed, the contact page is the place to say so.