Engineering Calculators & Reference Charts
Engineering Calculators
Free calculators and reference charts for machinists, fabricators, and design engineers. 16 tools and growing.
16 calculators
Sheet Metal & Fabrication Calculators 2
CALCPress Brake Tonnage CalculatorFree press brake tonnage calculator for air bending. Enter material, thickness, die opening, and bend length to get tonnage. Includes…
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 2
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…
TABLETap Drill Size ChartUNC, UNF & metric tap drill size chart with thread dimensions. Variable engagement %, clearance drills, and tolerances per ASME B1.1.
Machining Calculators 3
TABLEDrill Bit Size ChartPrintable drill bit size chart with decimal equivalents for number, letter, fractional, and metric drills. Filter by series, search by size…
CALCNPT Thread Milling PDO CalculatorFree NPT thread milling calculator for Fusion 360. Calculate Pitch Diameter Offset (PDO), tapered bore dimensions, and hole geometry for…
CALCThread Milling PDO CalculatorFree thread milling PDO calculator for Fusion 360. Calculate Pitch Diameter Offset for UNC and UNF internal threads with tool fit check.
Structural & Mechanical Calculators 1
Material Properties & Reference 3
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…
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…
CALCMetal Weight CalculatorFree metal weight calculator for steel, aluminum, stainless, copper, brass & titanium. Enter shape and dimensions to calculate weight for…
Welding Calculators & Charts 1
Pipe & Tube Reference 2
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…
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…
Seals & O-Ring Reference 1
Engineering Reference & Conversion 1
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Request a QuoteAll calculators are provided for reference only and offered "as is" without warranty of any kind. Verify critical calculations independently with a qualified professional. Spot an error? Let us know at Contact@pifabricators.com.