Irregular Curves, French Curves, Flexible Curves for Drafting - EngineerSupply

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Irregular Curves

Irregular curves, French curves, and flexible drafting curves can come in handy for most architects. A French curve can have many types of curved edges and can be used in manual drafting to draw smooth curves. If you’re looking for the perfect French curve ruler that you can use on your next project, be sure to look at what we have at Engineer Supply.

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Irregular Curves Features

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Variety of templates

Handy drafting tool

Great for architects

Sturdy design

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There are a lot of options when it comes to drawing and writing tools, which will typically include graphite or ink. Graphite will have different degrees of hardness. It will also allow you to manipulate darkness and light, as well as shade and shadow. You can even remove mistakes and make changes whenever you need to. Ink is more final. The quality of the line is more definitive, and it’s easy to produce. With graphite, you can choose between a regular lead pencil (which you’re used to from school), a lead holder (also called a “clutch”), or a mechanical pencil. A lead holder is similar to a regular pencil, and the graphite size is the same. The point can also be sharpened to the shape and size you need. A mechanical pencil is a fixed size, so it will create a consistent line thickness. And the lead doesn't have to be sharpened. The pencil will also indicate the lead size.


Architects, engineers, and designers use a scale to draw something very large or very small, because they may need to scale something up or down so the plan can be easily understood. An architectural scale is 12 inches long, and it has six sides. It has two scales on each side, so it has 12 different scales that convert inches to feet. There are smaller graduations before the zero, which represent the 12 inches within that 1/4-inch measurement. An engineering scale is in increments of ten. It only has six scales, which are larger. And each number on the ends of the scale represents how many feet are to an inch.

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Whether you need a French curve ruler or some other tool you can use on your next design, Engineer Supply has everything you need. We have a variety of mathematical tools that you can use to create precise blueprints, and we can offer them to you at a reasonable price. That’s why we’re one of the best places to buy architectural and engineering supplies online. Feel free to look at what we have in stock, so you can find a tool that’s right for you!


If you’re looking for a place where you can find a variety of French curves, Engineer Supply has everything you need. We have a broad selection of architectural templates and mathematical tools from some of the most recognized brands in the industry, and we can offer them to you at a reasonable price. Whether you’re looking for a French curve or some other tool, be sure to browse through the broad selection we have at Engineer Supply.

Frequently Asked Questions

How does a French curve work?

French curves are used to draft specific patterns. They were invented in the late 1880’s and were used by mathematicians, engineers, and sewing professionals. But technically, a French curve is a drafting tool that’s used to connect points to a smooth curve. It can also be used to draft garment patterns and make alterations.

Is a French curve a marking tool?

A French curve is a template that’s typically made out of metal, wood, or plastic that can make up many different parts of the Euler spiral (also known as “the clothoid curve”). It can be used in manual drafting and fashion design to draw smooth curves of different radii. The curve is placed on the drawing materials while a pencil, knife, or other medium is traced around its curves.

What is the purpose of a French curve?

A French curve is a drafting tool that can be used to draw smooth curves for a variety of mechanical drawings and blueprints. It can also be used in fashion design, because it can be helpful in making common fitting or pattern adjustments.

How do I use mathematical tools?

The most frequently used tools are traditional, which include physical objects or manipulatives, visualization tools, as well as the standard “paper and pencil.” But technological tools (such as calculators) and computers have gotten a lot more attention in recent years.

Where can I buy quality mathematical tools?

If you’re looking for the best set of quality mathematical tools and French curves, you can find what you need at Engineer Supply. We have a variety of architectural and engineering tools from some of the best brands in the industry. So if you need a French curve ruler or any other tool you can use for drafting, be sure to look at what we have in stock.

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