Resources for machinists and fabricators
Speeds and feeds calculators, tap drill charts, hardness converters, unit converters, and more. Built for machinists, fabricators, and engineers. No signups, no ads, no paywalls.
Free machinist and fabricator tools
Recommendations
AI Tools
Calculators
Aluminum Weight Calculator
Calculate weight by dimensions and alloy.
6061 Aluminum Weight Calculator
NewCalculate 6061 plate, block, and round bar weight.
7075 Aluminum Weight Calculator
NewCalculate high-strength 7075 plate and bar weight.
7050 Aluminum Weight Calculator
NewCalculate 7050 aerospace plate and bar weight.
6061 Plate Weight Calculator
NewCalculate 6061-T651 plate and block weight by cut size.
6061-T6511 Weight Calculator
NewCalculate 6061-T6511 flat and round bar weight.
Stainless Steel Bar Weight Calculator
NewCompare 304, 316, 17-4 PH, and 416 bar weight.
304 Stainless Bar Weight Calculator
NewCalculate 304 stainless round bar weight.
316 Stainless Bar Weight Calculator
NewCalculate 316 stainless round bar weight.
17-4 PH Bar Weight Calculator
NewCalculate 17-4 PH stainless round bar weight.
416 Stainless Bar Weight Calculator
NewCalculate free-machining 416 round bar weight by cut size.
Speeds and Feeds Calculator
RPM, feed rate, and chip load by material and tool.
Material Removal Rate Calculator
MRR in cubic inches per minute for milling.
Chamfer and Countersink Calculator
Chamfer width, depth, and countersink dimensions.
Scrap Value Calculator
Estimate the dollar value of your aluminum drops.
Thermal Expansion Calculator
Dimensional change from temperature shifts.
Stack Tolerance Calculator
Worst case and RSS tolerance stack-up analysis.
Shop Rate Calculator
Calculate your required hourly rate by costs and capacity.
Weld Distortion Estimator
Predict angular distortion, shrinkage, and warping.
Plate Warp and Distortion Risk Calculator
NewPredict how much 6061, 7075 or 7050 plate bows after machining.
Plate Thickness Tolerance and Cleanup Calculator
NewASTM B209 thickness tolerance and whether the part will clean up.
Thread Pull-Out and Engagement Calculator
NewStrip load and minimum thread engagement in aluminum.
Anodize Growth and Pre-Anodize Size Calculator
NewPre-anodize machining size for bores, ODs, slots and tapped holes.
Buy-to-Fly Ratio and Cost Per Part Calculator
NewChip weight, scrap credit, and true material cost per part.
Tool Deflection and Chatter Risk Calculator
NewEnd mill tip deflection, L to D risk band, and what to change first.
Surface Finish Predictor
NewAchievable Ra and Rz from feed and nose radius, plus max feed for a target finish.
Tolerance Feasibility and Cost Checker
NewCheapest process that holds a callout, the cost band, and what is really governing.
Reference Charts
Tap Drill Chart
Tap drill sizes for imperial and metric threads.
Thread Pitch Reference
UNC, UNF, UNEF, and metric thread data.
Drill Size Chart
Number, letter, and fractional drill sizes.
Bolt Torque Reference
Torque values by bolt size, grade, and condition.
GD&T Quick Reference
Geometric dimensioning and tolerancing symbols.
Hardness Converter
HRC, HRB, Brinell, Vickers, tensile strength.
Surface Finish Converter
Ra, Rz, RMS, CLA with reference values.
Machine Taper Reference
CAT40, BT30, HSK, Morse taper dimensions.
G-Code / M-Code Reference
Searchable G and M code reference for Fanuc, Haas, Mazak.
Insert Geometry Decoder
Decode carbide insert designations (CNMG, WNMG, etc.).
Plate Stock Reference
Standard mill plate sizes and stocked thicknesses by alloy.
Plate Flatness and Bow Tolerance Chart
NewHow much bow and waviness ASTM B209 actually allows, by size.
Spec Cross-Reference and Obsolescence Checker
NewQQ-A-250, AMS and ASTM B209 with active or cancelled status.
Converters
Hardness Converter
HRC, HRB, Brinell, Vickers, tensile strength.
Surface Finish Converter
Ra, Rz, RMS, CLA with reference values.
Metals Unit Converter
Length, weight, stress, density, temperature, gauge.
Decimal / Fraction / mm Converter
Instant conversion between decimal, fraction, and mm.
Spec Cross-Reference and Obsolescence Checker
NewQQ-A-250, AMS and ASTM B209 with active or cancelled status.