Math for Welders 2-3 by 
Practical Problems in Mathematics for Welders by 
Geometry for Dummies by 
The Britannica Guide to Algebra and Trigonometry by 
Fraction to Decimal Calculator
Worksheet to help with math for welders
NSF Math Curriculum for Welding
Contains worksheets and lessons on math for welders
For Welders, Welding Students, Welding Instructors and Others Involved in Managing Welding Operations.
Extensive online resource on mathematics
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Math for Welders
Welders need to be familiar with the following math topics:
Fractions & Decimals: Almost every blueprint will have calculations based on fractions that will need to be converted to decimals to get accurate weld points.
Geometry: welding projects require you to understand, calculate and measure welds at different angles. Welders will need to be able to calculate length and size of various shapes and calculate the radius, diameter, and circumference of rounded shapes.
Trigonometry: Welders need an understanding of tangents, signs and cosigns in order to test the strength of the joint without breaking it.
Arithmetic: Calculate shapes, sizes, and volume of sheets for welding, Determine pressure, angle, volume of gases to use, and changes in temperature and its effects on metals, calculate shapes and structures for rebuild.
Will help with basic mathematics and algebra
Math Libguide on different topics in mathematics