Most kids are totally and utterly bored by math. Let’s face it, it’s a bunch of weird signs and symbols with funny names that are used to solve problems that can be unrelatable and extremely far from the real world. If math were practical, then it would be more interesting, such as dissecting animals, watching a butterfly emerge from its cocoon, or even learning about D-Day and how America helped win World War II.

Missouri Welding Institute takes math and makes it extremely practical, as we show you how you will use math most likely on a daily basis in your welding career. Our Basic Trade Math and Application course will teach you everything math-related you need to know to be a successful welder. Below, we’ll dive into a bit more detail on the “details” of math for welders. Contact us today for your free information packet!


Fractions and Decimals in Welding

Fractions and decimals often go hand in hand since decimals are just fraction written in a different form. Fractions and decimals are used frequently to determine sizes in welding, such as how big to make a part. Units of measurement are used as well, such as inches and feet, so rulers are a big part of welding as well. You’ll also see fractions and decimals in these other welding applications:

  • Blueprints
  • Penetration depths
  • Welding seams
  • Measurements of metal and other materials
  • Sizes of projects and/or component parts
  • When determining materials amounts
  • Pipe cutting

Geometry in Welding

Geometry is the branch of mathematics that is concerned with the size, shape, of figures and how these figures fit in space, as well as the relation of points, lines, surfaces, solids, and analogs. Shapes are studied both in two-dimensions and three-dimensional space.

For welders who make objects out of different materials and metals, he or she needs to have a good working knowledge of angles, radius, volume, diameter, and circumference. Knowing how to use drafting tools, such as a compass or a protractor, is helpful as well. Welders frequently need to make accurate joints, measure and create angles, and find the correct proportions of circles and other shapes when welding.

Mathematical Formulas in Welding

If you’re not good at math, don’t let the fact that you need to know mathematical formulas scare you away from a career in welding. When you enroll at Missouri Welding Institute, you’ll be taught everything you need to know to be successful in welding. The mathematical formulas you need to know mostly pertain to geometry, such as calculating shapes and volume, determining the pressure and volume of gases used in welding, testing how temperature changes will affect pressure, and shapes.

Trigonometry in Welding

Another sometimes scary element to math for welders is trigonometry. However, don’t let Latin names, such as sine, cosine, and tangent, make relatively easy concepts seem more complicated than they are. The professional welders at Missouri Welding Institute will help you have an intricate knowledge of trigonometry relative to what welders will need for their careers. Some pertinent information you will need to know includes calculating degrees for accurate angle formulation, determining perimeter and length of sides of shapes so you can replicate it, and finding the theoretical strength of a weld, which will help you in choosing the appropriate material for the welding task at hand.


Not only will you be measuring almost every day, but you’ll also be required to read and understand blueprints and schematics, which uses basic math such as fractions and decimals. You’ll need geometry to make weld joints correctly and trigonometry to calculate volume and area. A basic understanding of chemistry and gases and formulas to calculate volume of gases and changes in pressure is needed as well.

At Missouri Welding Institute, we will make sure you have a solid foundation of math when you leave our welding program. During our hands-on training in the shop, you will get to see math at work and hopefully gain a new appreciation for math that you didn’t have in high school. Having a good understanding of math will make you able to execute more complicated welds, which will help you gain new customers and keep them. Contact us today to get started!