Engineering Calculators & Reference Charts
Engineering Calculators
Free calculators and reference charts for machinists, fabricators, and design engineers. 24 tools and growing.
24 calculators
Sheet Metal & Fabrication Calculators 2 calculators
Type: CALCPress Brake Tonnage CalculatorFree press brake tonnage calculator for air bending. Enter material, thickness, die opening, and bend length to get tonnage. Includes…
Type: TABLESheet Metal Gauge ChartInteractive sheet metal gauge thickness chart for steel, stainless steel, aluminum, and galvanized. Gauge to inches and mm with filtering…
Fastener & Thread Calculators 3 calculators
Type: TABLEBolt Torque ChartBolt torque chart for SAE Grade 2, 5 & 8 plus calculator for metric (ISO 8.8/10.9/12.9) and stainless steel bolts. Dry and lubricated…
Type: TABLEClearance Hole ChartClearance hole chart for bolts and screws — normal, close, and loose fit drill sizes with hole diameter limits, inch and metric, per ASME…
Type: TABLETap Drill Size ChartUNC, UNF & metric tap drill size chart with thread dimensions. Variable engagement %, clearance drills, and tolerances per ASME B1.1.
Type: CALCNPT Thread Milling PDO CalculatorFree NPT thread milling calculator for Autodesk Fusion. Calculate Pitch Diameter Offset (PDO), tapered bore dimensions, and hole geometry…
Type: CALCThread Milling PDO CalculatorFree thread milling PDO calculator for Autodesk Fusion. Calculate Pitch Diameter Offset for UNC and UNF internal threads with tool fit…
Machining Calculators 5 calculators
Type: CALCChip Load CalculatorFree CNC chip load calculator. Solve for chip load (feed per tooth) or feed rate in inch or metric units, with optional radial chip…
Type: TABLEDrill Bit Size ChartPrintable drill bit size chart with decimal equivalents for number, letter, fractional, and metric drills. Filter by series, search by size…
Type: CALCDrilling Feed Rate CalculatorFree drilling feed rate calculator. Solve spindle RPM, feed rate, and material removal rate from drill diameter, SFM, and feed per…
Type: CALCNPT Thread Milling PDO CalculatorFree NPT thread milling calculator for Autodesk Fusion. Calculate Pitch Diameter Offset (PDO), tapered bore dimensions, and hole geometry…
Type: CALCThread Milling PDO CalculatorFree thread milling PDO calculator for Autodesk Fusion. Calculate Pitch Diameter Offset for UNC and UNF internal threads with tool fit…
Type: TABLEClearance Hole ChartClearance hole chart for bolts and screws — normal, close, and loose fit drill sizes with hole diameter limits, inch and metric, per ASME…
Type: TABLETap Drill Size ChartUNC, UNF & metric tap drill size chart with thread dimensions. Variable engagement %, clearance drills, and tolerances per ASME B1.1.
Structural & Mechanical Calculators 3 calculators
Type: CALCBeam Deflection CalculatorFree beam deflection calculator for simply supported and cantilever beams. Calculate max deflection, bending stress, and reactions for…
Type: CALCCentrifugal Force CalculatorFree centrifugal force calculator. Enter mass, radius, and RPM (or velocity) to get force in lbf or N, plus g-force. Imperial and metric.…
Type: CALCSection Modulus & Moment of Inertia CalculatorFree section modulus and area moment of inertia calculator for rectangle, circle, tube, and I-beam cross-sections. Returns I, Z, polar…
Material Properties & Reference 6 calculators
Type: CALCBrinell Hardness CalculatorFree Brinell hardness calculator — enter test load, ball diameter, and indentation diameter to compute HBW (BHN) per ASTM E10, with a steel…
Type: TABLEDensity of Metals ChartDensity of metals chart with values in lb/in³, g/cm³, and lb/ft³ for 70+ alloys. Filter by category, search by alloy name. Sourced from…
Type: HYBRIDHardness Conversion CalculatorFree hardness conversion calculator and chart — Brinell, Rockwell C, Vickers, and Shore, with tensile estimate. Printable PDF, per…
Type: TABLEMachinability Chart with ISO 513 / VDI 3323 CodesMachinability chart with ISO 513 / VDI 3323 codes for steel, stainless, cast iron, aluminum, Inconel, and hardened steel. Filter by AISI…
Type: CALCMetal Weight CalculatorFree metal weight calculator for steel, aluminum, stainless, copper, brass & titanium. Enter shape and dimensions to calculate weight for…
Type: TABLEStainless Steel Grades ChartStainless steel grades chart: composition, tensile, yield, hardness, and applications for 24 grades. Compare 304 vs 316, magnetic vs…
Welding Calculators & Charts 1 calculators
Pipe & Tube Reference 2 calculators
Type: TABLENPT Pipe Thread Size ChartNPT pipe thread size chart with ASME B1.20.1 Table 1a and 1b dimensions. Searchable reference for all 13 standard NPT sizes from 1/16 to 4…
Type: TABLEPipe Schedule ChartSteel pipe schedule chart with wall thickness, ID, OD, and weight per foot for NPS 1/8 to 24. Filter by pipe size and schedule number per…
Type: CALCNPT Thread Milling PDO CalculatorFree NPT thread milling calculator for Autodesk Fusion. Calculate Pitch Diameter Offset (PDO), tapered bore dimensions, and hole geometry…
Seals & O-Ring Reference 1 calculators
Engineering Reference & Conversion 1 calculators
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