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The Golden Ratio: 1.000000 to 1.618034
or 0.618034 to 1.000000

This Fibonacci Gauge holds constant the "Golden Ratio" and takes the math out of creating pleasingly proportioned Art and Craft items. I make each gauge individually, using apple wood, metal hardware, and Danish oil finish. Apple wood is a wonderful medium for this tool, because it is durable and flexible, and attractive, with smooth satin texture. With proper care, it will last for many years. And I maintain a margin of error of less-than-two-percent, which provides a very accurate rendering of the Golden Ratio across the span so you can use it with confidence.

The size is 7 inches (18 cm) long, 1/4 inch (0.6 cm) thick, and the total usable span ranges from 1 1/2 inches (3.8 cm) to about 12 inches (30 cm). A fibonacci gauge this size is suitable for use with small to medium-sized objects or paintings/drawings. Permanent make-up artists have used them to design eyebrows It can also be used in scaled drawings, bearing in mind that the actual golden ratio is 1.000 to 1.618, or 0.618 to 1.000, for when you need to calculate the actual dimensions. Since these gauges are made with high grade wood, no two of them are alike; each has a unique appearance or a "personality" all its own.

I also make a larger fibonacci gauge if requested... usable on larger projects or drawings, or for demonstrating the golden ratio on a chalkboard. If you want a larger size, just ask. I have double-size fibonacci gauges made of cherry wood or walnut or mahogany wood in stock at a reasonable price. And if it is not more than 98 percent accurate, it never leaves the shop.


SPECIAL OFFER: For Fibonacci fans, I will include, free of charge, two independent derivations of the Golden Ratio (one geometric, and one mathematical) with the purchase of two or more Fibonacci gauges from my listings. A quantity shipping discount of 6.75 per additonal item applies on all multiple-item purchases by international buyers.

International Buyers – Please Note:

Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility.

Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying.

Shipping Notice:

As of January, 2016, the US Postal Service has increased the postage rates for domestic and overseas shipments. The current shipping and handling charges of this listing reflect those changes. For International buyers, the shipping discount for the purchase of multiple items remains in effect, commensurate with the new postage rates.

Fibonacci Gauge, Arts and Crafts Golden Ratio Design Tool, PHI Caliper



  • Handmade Supply
  • Craft type: Home improvement, Painting, Quilting, Sculpture, Woodworking & carpentry
  • Materials: apple wood, aluminum, Danish Drying Oil
  • Ships worldwide from United States
  • Feedback: 97 reviews
  • Favorited by: 327 people