Metal & Fabrication calculators
Layout and forming calculators for welders, fabricators, and machinists.
- Bolt Circle Coordinates CalculatorEach hole is at X = R cos(θ), Y = R sin(θ), where R is half the bolt circle diameter and θ steps by 360° ÷ number of holes.Inputs: Bolt circle diameter, Number of holes, Start angle
- Sheet Metal Bend Allowance and K-Factor CalculatorBend allowance = bend angle (radians) × (inside radius + K-factor × thickness), and the flat length is the two outside leg lengths minus the bend deduction.Inputs: Material thickness, Inside bend radius, K-factor
- Steel Plate and Bar Weight CalculatorWeight equals cross-section area × length × the metal’s density; carbon steel weighs about 0.284 lb per cubic inch, or 40.8 lb per square foot per inch of thickness.Inputs: Material, Shape, Length
- Tap Drill Size CalculatorTap drill = major diameter − (1.299 × percent of thread ÷ 100 × pitch); at 75% that is the major diameter minus 0.974 ÷ threads per inch.Inputs: Major diameter, Pitch entered as, Threads per inch
- Taper CalculatorTaper per foot is (large diameter − small diameter) ÷ length × 12, and the half angle is arctan((D − d) ÷ (2 × length)).Inputs: Large diameter, Small diameter, Length of the taper
- Weld Filler Metal Volume and Weight CalculatorWeld metal weight = weld cross-section × length × density; a fillet weld's cross-section is leg² ÷ 2, and you buy that weight divided by the process's deposition efficiency.Inputs: Joint, Fillet leg size, Plate thickness