Thirty free engineering tools that run in your browser, install to your home screen and work offline. Nothing is uploaded, no sign-up. Every tool is a prototype for reference use: verify results against the applicable code before relying on them.
Open the interactive tools →Need it done properly? Calculation packagesDrawings & Documents
Weld Symbol BuilderFree weld symbol generator to ISO 2553 (System A and B) and AWS A2.4. Fillet, butt, plug, spot and seam welds with size, intermittent length, contour, all-round, site…Flange Drawing GeneratorFree online flange drawing generator. Pick an ASME B16.5 class or EN 1092-1 PN flange and get a dimensioned front and section view on a drawing sheet, exportable as SVG,…Gantt Chart GeneratorFree Gantt chart generator. Add phases, tasks and dates and get a to-scale project programme on a drawing sheet with automatic day, week or month scaling. Exports as SVG…Dished Head Drawing GeneratorFree dished head drawing generator. Torispherical (DIN 28011 Klöpper, DIN 28013 Korbbogen, ASME F&D), 2:1 ellipsoidal and hemispherical heads drawn to scale with depth,…
Pressure & Piping
Minimum Wall Thickness CalculatorCalculate the minimum required wall thickness for straight cylindrical pipes and shells under internal pressure. Selectable design code — ASME B31.3, ASMEExternal Pressure & Collapse CalculatorCalculate the elastic and plastic collapse pressures for cylindrical shells under external pressure — vacuum vessels, jacketed vessels, buried pipeworkFlange Size & Rating CalculatorSelect a flange standard, pressure class and nominal size to retrieve full dimensions — OD, bolt circle, bolt count and size, flange thickness, raisedFlange Pressure-Temperature Rating LookupFree ASME B16.5 flange pressure-temperature rating lookup. Rated working pressure by material group, class and temperature, minimum class for a design pressure, rating…Pipe & Tube Size CalculatorSelect a standard, nominal size, and schedule to retrieve full dimensions — OD, ID, wall thickness, weight per metre, and manufacturing tolerances. CoversFlow, Velocity & Pipe Size CalculatorFree pipe velocity calculator. Enter flow rate and pipe size, or flow and a target velocity, to get velocity, cross-section area and the smallest standard pipe that…Pipe Flow & Pressure Loss CalculatorSize pipework from flow rate and design velocity. Select a fluid to load recommended velocities and properties, then add pipe length and fittings toPipework Thermal Expansion CalculatorCalculate free thermal expansion, constrained thermal force and stress, and the minimum expansion loop or offset leg length required to absorb theTank & Vessel Volume CalculatorFree tank volume calculator for horizontal and vertical cylindrical tanks with flat, 2:1 elliptical or hemispherical heads. Total and partial-fill volume with a dipstick…
Structural & Fabrication
Fastener & Thread DataFree fastener reference: ISO metric coarse and fine pitches, tap drill and clearance hole sizes, stress areas, ISO 4014/4032 hex bolt and nut dimensions with DIN…Beam Deflection & Stress CalculatorCalculate maximum bending moment, shear force, deflection and bending stress for nine standard beam and loading configurations. Enter factored loads forSteel Section Property CalculatorSelect a section type and designation to retrieve full dimensions and structural properties — area, second moment of area, section modulus, radius ofSheet Steel Weight CalculatorSelect a material type, grade, and thickness to retrieve weight per m², weight per standard sheet size, SWG gauge equivalent, and manufacturingMetal Weight CalculatorFree metal weight calculator for plate, round and flat bar, tube, hollow sections and sheet in steel, stainless, aluminium and other alloys. Weight per piece, per metre…Bend Allowance & Flat Pattern CalculatorFree sheet metal bend allowance calculator. Enter thickness, inside radius, bend angle and material to get bend allowance, bend deduction, outside setback and flat blank…Fillet Weld CalculatorFree fillet weld strength calculator to Eurocode EN 1993-1-8 (simplified method) or AISC 360. Enter leg size, length and load to get throat, capacity and utilisation…Bolt Torque CalculatorFree bolt torque calculator for metric bolts to ISO 898-1. Enter size, property class and lubrication to get tightening torque, clamp load and a full torque table for…Bolt Circle / PCD CalculatorFree bolt circle calculator. Enter PCD, hole count and start angle to get X/Y coordinates for every hole, angular spacing and chord distance, with a scaled pattern…Flat Plate Deflection & Stress CalculatorFree flat plate deflection and stress calculator per Roark's Formulas. Rectangular or circular plates, simply supported or clamped edges, uniform or hydrostatic pressure…
Fluids & Thermal
Pipe Heat Loss & Insulation CalculatorFree pipe heat loss calculator. Loss per metre, surface temperature, condensation and touch-limit checks, annual energy cost, and a comparison of insulation thicknesses…Psychrometric CalculatorFree psychrometric calculator. Enter dry bulb and RH, wet bulb, dew point or humidity ratio to get the full moist-air state, plus mixing of two air streams and a live…Pump & Fan Power CalculatorFree pump and fan power calculator. Enter flow and head or pressure rise to get hydraulic power, shaft power from efficiency, motor input and an installed rating with…Fluid Mixing CalculatorCalculate the resultant temperature, mass flow rate, density, specific heat and viscosity when two fluid streams are combined. Select from gases and
General
Material Properties LookupFree material properties table for 41 engineering grades: density, modulus, yield, tensile strength, thermal expansion, conductivity and service limits for structural…Engineering Unit ConverterFree engineering unit converter with 26 categories: pressure and stress, force, torque, power, energy, flow, velocity, viscosity, thermal conductivity, heat transfer…Scientific CalculatorFree online scientific calculator with trigonometric, logarithmic and power functions, memory, DEG/RAD modes and full keyboard support. No download, no