Engineering tools
Browse by what you need to do: identify a part, size a system, select a component, diagnose a margin, generate geometry, lay out a pattern, check a limit, compare options, tune a setup, estimate cost or load, convert scales, or look up a standard table.
Identifiers 5 Sizing Tools 35 Selectors 9 Diagnostics 10 Generators 8 Layout Tools 15 Checkers 19 Comparators 4 Tuners 12 Estimators 23 Planners 18 Converters 7 Lookups 16 Calculators 5
Identifiers
5 toolsMatch measured parts, sizes, gauges and fit families to likely standards.
Identify Thread Identifier Match measured major diameter and pitch or TPI to likely metric, UNC and UNF thread designations. Identify Drill Size Finder Find the nearest number, letter or fractional drill from a target hole size or shop designation. Identify Sheet Metal Gauge Finder Find the nearest sheet-metal gauge by material and target thickness, with inch, mm, mil and weight references. Identify Wrench Size Finder Find wrench and socket size from metric or SAE bolt size, or match measured hex across-flats dimensions. Identify Keyway Fit Finder Find DIN 6885-1 parallel key size, shaft depth, hub depth and fit-class notes from shaft diameter.
Sizing Tools
35 toolsPick practical duct, wire, drill, transformer, pipe and member sizes from design inputs.
Size Duct Size Size round and rectangular HVAC ducts from airflow, velocity and friction-rate targets. Size Grille Size Size HVAC grilles, registers and diffusers from airflow and target face velocity. Size Refrigerant Line Size Screen suction and liquid refrigerant line IDs from capacity, properties, velocity targets and pressure-drop budgets. Size Casting Gating System Size casting choke, runner and ingate areas from pour rate, head and gating ratio. Size Drawer Slide Size drawer slide clearances, rounded slide length, box width and estimated travel. Size Transformer kVA Size single-phase or three-phase transformer kVA from voltage, current, kW and power factor. Size Motor Full-Load Amps Size formula motor running amps, design current and service-factor current from horsepower, voltage, efficiency and power factor. Size Motor Overload Size Size motor overload relay/heater target setting from nameplate FLA, multiplier and selected dial setting. Size Grounding Conductor Size Size equipment grounding conductors from OCPD rating, material and voltage-drop upsize ratio. Size Off-Grid Solar Size off-grid PV watts, battery Ah, controller current and inverter rating from daily load. Size Solar String Sizing Size PV series strings against cold Voc, hot Vmp, MPPT window and input current. Size Access Control Power Supply Size access-control power supply amperage, farthest-door wire drop and standby battery capacity. Size Tap Drill Size Size tap drills from thread designation and target percent thread engagement. Size Addendum Dedendum Size spur-gear addendum, dedendum, whole depth, clearance, outside diameter and root diameter. Size Sprocket Pitch Diameter Size roller-chain sprocket pitch diameter from chain pitch and tooth count. Size Pipe Size by Flow Velocity Size pipe inside diameter from flow rate and target velocity. Size Catch Basin Sizing Size catch-basin grate open area and outlet pipe capacity from drainage area and rainfall intensity. Size Trench Drain Sizing Size trench drain grate open area, channel depth and outlet pipe capacity from runoff or known flow. Size Gutter & Downspout Sizing Size roof gutter capacity, required gutter depth and downspout count from roof area and rainfall intensity. Size Roof Ventilation Size attic roof ventilation NFA, soffit/ridge split and vent count or linear feet from floor area and product data. Size French Drain Sizing Size French-drain trench storage, gravel voids, perforated pipe capacity and required trench length. Size Swale Capacity Size trapezoidal drainage swale capacity, velocity, required depth and limiting drainage area. Size Sump Pump Capacity Size sump pump capacity at head from inflow, basin volume, pump-down time and cycling. Size Culvert Capacity Size circular or box culvert barrel capacity for a road or driveway crossing from drainage area, rainfall intensity, slope and Manning n. Size Water Softener Sizing Size water softener resin volume, usable grain capacity and regeneration interval from hardness load. Size Deck Joist Span Size preliminary deck joist spans from joist spacing, loads and entered wood design values. Size Deck Beam Span Size preliminary deck beam spans from tributary deck width, built-up plies and entered wood design values. Size Deck Footing Size Size preliminary deck or post footing bearing area from load and entered allowable soil bearing. Size Wood Beam Span Size preliminary sawn-lumber beam or joist spans from loads and member dimensions. Size Lintel Size Size preliminary lintel span, load, section S/I and bearing checks. Size Hydraulic Cylinder Force Size hydraulic cylinder push and pull force from pressure, bore and rod diameter. Size Hydraulic Cylinder Speed Size hydraulic cylinder stroke speed, stroke time and required flow from bore, rod, stroke and pump flow. Size Compressed Air Receiver Sizing Size compressed-air receiver volume, reserve time and recharge time from demand, compressor FAD and pressure band. Size Compressed Air Pipe Sizing Size compressed-air pipe ID and pressure drop from SCFM, line pressure, run length, roughness and fittings. Size Tractor PTO Horsepower Size tractor PTO or equivalent implement horsepower from shaft torque or draft pull.
Selectors
9 toolsChoose a target size, rating, component, wire, pin, bearing or material class from constraints.
Select Spring Design Select spring wire diameter and active coils from target load, travel and spring index. Select Spring Wire Size Select compression-spring wire size from target rate and stress limits. Select Bearing Life (L10) Select bearing rating life from load, speed and catalog dynamic rating. Select Brake Master Cylinder Bore Select master-cylinder bore from target brake line pressure and pedal force. Select Fuel Injector Flow Select injector flow rating from target power, BSFC, duty cycle and fuel pressure. Select Valve Spring Rate Select valve-spring geometry by rate, seat load, open load, bind clearance and stress margin. Select Shaft Diameter Select solid shaft diameter from torque, bending moment, allowable shear and safety factor. Select Shear Pin Diameter Select shear pin diameter from load, allowable stress, safety factor and shear planes. Select Standing Rigging Wire Size Select sailboat rigging wire size from breaking strength, safety factor and tension.
Diagnostics
10 toolsTroubleshoot margins, bottlenecks, surge, cavitation, critical speed and pressure problems.
Diagnose Duct Friction Loss Diagnose duct run pressure loss from CFM, size, equivalent length, roughness and static budget. Diagnose HVAC Static Pressure Diagnose external static pressure bottlenecks across ducts, filters, coils and terminals. Diagnose Pump NPSH Diagnose NPSH margin and cavitation risk for pump suction conditions. Diagnose Water Hammer Pressure Diagnose pipe surge pressure, critical closure time and pressure-rating margin. Diagnose Driveshaft Critical Speed Diagnose driveshaft critical speed margin from tube geometry, length and material. Diagnose End Mill Deflection Diagnose end-mill stickout deflection, stress and L/D ratio from flute length, radial force and stiffness factor. Diagnose Boring Bar Deflection Diagnose boring bar or cutter stickout deflection, stress margin and L/D overhang ratio. Diagnose Stall Margin Diagnose aircraft load-factor and accelerated-stall margin for a planned g load. Diagnose Spring Natural Frequency Diagnose spring natural frequency, effective moving mass and operating-frequency separation. Diagnose Spring Buckling Diagnose compression spring buckling critical deflection, no-buckling length and diameter margin.
Generators
8 toolsCreate geometry, DXF profiles, coordinates, cut lists and flat patterns.
Generate Gear Generator Generate an involute spur gear preview and DXF outline from module or DP. Generate Gear DXF Generator Build a CAD-ready involute spur gear DXF from tooth count, pressure angle and pitch. Generate Cut List Generate board cut lists with kerf, yield and rough material planning. Generate Plywood Cut Optimizer Generate sheet-goods cut layouts with kerf, rotation, yield and cost. Generate Cone Flat Pattern Generate cone and frustum flat-pattern dimensions for sheet-metal layout. Generate Square to Round Transition Generate station true lengths and blank-area checks for square-to-round transition layout. Generate Box Flat Pattern Generate tray or open-box blanks with bend allowance, deduction and relief checks. Generate Duct Transition Lay out duct transition length, taper angle, area change and velocity check.
Layout Tools
15 toolsTurn dimensions into spacing, slopes, hole coordinates, joinery geometry and field layout marks.
Lay out Bolt Circle Coordinate Lay out X-Y bolt-circle coordinates for drilling, inspection or CNC setup. Lay out Taper Per Foot Lay out machining taper per foot, compound angle and tailstock setover from two diameters. Lay out Dovetail Spacing Lay out dovetail tails, pins, species slope guidance and cleanup-chisel width. Lay out Mortise and Tenon Lay out mortise and tenon cheeks, shoulders, clearances and glue area. Lay out Dado & Groove Lay out dado and groove slot width, wall marks, cut depth, cutter passes and glue-contact area. Lay out Pipe Slope Lay out pipe fall, pitch, end invert elevation and slope ratio from run length. Lay out Pipe Rolling Offset Lay out pipe rolling offset true offset, travel, cut length, advance and roll angle. Lay out Pipe Bend Developed Length Lay out pipe bend arc length, developed cut length, chord, setback and blank margin. Lay out Pipe Miter Cut Lay out pipe miter cut angle, long-to-short difference and wrap-around template marks. Lay out Pipe Saddle Cut Lay out centered branch saddle and lateral coping template drops. Lay out Pipe Reducer Offset Lay out concentric and eccentric pipe reducer offset, side lengths and taper angles. Lay out Conduit Bend Offset Lay out conduit offset bend marks, shrink allowance, straight-run margin and bend budget. Lay out Deck Diagonal Board Lay out diagonal deck board rows, longest run, waste and material count. Lay out Deck Ledger Fastener Spacing Lay out deck ledger fastener spacing from tributary load and entered fastener allowable. Lay out Standing Rigging Spec Lay out replacement stay or shroud cut length with turnbuckle setup and reserve.
Checkers
19 toolsPass/fail and utilization screens for tolerances, code-style limits and design margins.
Check True Position Check GD&T position error against tolerance, MMC bonus and result verdict. Check Tolerance Stack-Up Check worst-case and RSS stack limits from signed dimensions and tolerances. Check Conduit Fill Check conductor area against raceway fill limits by trade size. Check Electrical Box Fill Check outlet, switch and junction box volume from conductors, devices, grounds and clamps. Check Voltage Drop Check wire size, voltage drop and percent loss for AC or DC runs. Check Short-Circuit Current Check available fault current from transformer kVA, impedance and source/downstream R/X. Check Conduit Pull Tension Check conduit pull tension, bend multiplier and sidewall pressure from route friction and cable limits. Check Press Fit / Interference Check interference pressure, assembly force, torque capacity and hub stress. Check Shelf Sag Check shelf span deflection against a practical sag limit. Check Notched Joist Capacity Check remaining bending and shear stress at a notched joist or beam section. Check Pipe Pressure Rating Check pipe wall pressure rating and Barlow-style utilization. Check Thread Engagement Check engaged thread length against internal and external stripping. Check Epoxy Anchor Pullout Check adhesive anchor bond capacity, steel capacity, utilization and required embedment. Check Hydraulic Cylinder Rod Buckling Check hydraulic cylinder rod buckling, yield capacity, safety factor and required rod diameter. Check Hydraulic Fluid Velocity Check hydraulic oil velocity and required line ID from flow, line type and actual bore. Check Brake Bias Check front/rear brake bias from pressure, piston area, pad friction and rotor radius. Check Carbon Equivalent Check steel CE, Pcm and CET against entered weldability and preheat-screening limits. Check Chvorinov Solidification Time Check casting and riser solidification time from Chvorinov modulus and target time ratio. Check Part 103 Ultralight Check Part 103 ultralight weight, fuel, speed and basic use thresholds from entered data.
Comparators
4 toolsCompare alternatives such as tire sizes, wheel offsets, gear tables and finish scales.
Compare Tire Size Compare tire diameter, circumference, revs per mile and speedometer change. Compare Wheel Offset Compare wheel width, offset, spacer, backspacing, inner clearance and outer poke. Compare Gear Speed Table Compare road speed across transmission gears at a target RPM. Compare Va Weight Table Compare maneuvering speed across aircraft operating weights.
Tuners
12 toolsAdjust ratios, speeds, tensions, rates and setup targets until the operating window is right.
Tune Gear Backlash Tune spur-gear backlash allowance, angular backlash and tooth-thickness reduction from pitch size. Tune Final Drive Ratio Tune axle or final-drive ratio from target RPM, road speed, tire size and gear ratio. Tune RPM Drop Tune shift spacing by comparing after-shift RPM and power-band margin. Tune Dynamic Compression Ratio Tune cam-timing compression geometry from static ratio, rod length and intake closing angle. Tune Exhaust Resonator Tune quarter-wave side-branch or Helmholtz resonator length from target drone frequency and gas temperature. Tune Welding Amperage Tune starting welding current, voltage and wire/electrode setup from process, material and thickness. Tune Welding Duty Cycle Tune welding current and cooldown against a rated machine duty cycle. Tune Belt Tension Tune tight-side, slack-side and effective belt tension from power, speed and wrap. Tune Lead Screw Torque Tune lead screw torque, thrust, linear speed and critical RPM for a motion axis. Tune Clutch Torque Capacity Tune clutch clamp force and design margin from friction, radius and surface count. Tune Suspension Wheel Rate Tune wheel rate and ride frequency from spring rate, motion ratio and corner mass. Tune Va Weight Adjustment Tune published maneuvering speed for actual operating weight when the POH permits it.
Estimators
23 toolsScreen cost, capacity, heat loss, charge, fuel, runtime and performance before detailed design.
Estimate Concrete Slab Estimate rectangular slab concrete volume, cubic yards, bags, ready-mix truckloads, weight and entered-price cost. Estimate Wood Glue Consumption Estimate wood glue or adhesive volume, containers, leftover and cost from bonding area and spread rate. Estimate Wood Stain Coverage Estimate wood stain, paint or sealer volume, containers and cost from area, coats, species and surface condition. Estimate Furnace BTU Estimate furnace BTU/h, output capacity and supply airflow from a screening load. Estimate Mini Split Sizing Estimate ductless mini-split room BTU/h, nominal size, tons and airflow screen. Estimate BTU/GPM Delta T Estimate hydronic BTU/h, required GPM and required Delta T from water or glycol flow. Estimate Refrigerant Line Charge Estimate added refrigerant charge from line-set length and manufacturer charge rate. Estimate Expansion Tank Sizing Estimate hydronic expansion tank acceptance, minimum volume, utilization and pressure margin. Estimate Pipe Insulation Heat Loss Estimate pipe heat loss, heat saved, surface temperature and annual energy cost. Estimate Compressed Air Leak Cost Estimate compressed-air leak flow, annual kWh, cost and repair payback from SCFM or orifice size. Estimate Chemical Feed Rate Estimate chemical feed pump rate, daily use and day-tank runtime from ppm dose. Estimate Fleet Fuel Cost Estimate fleet route fuel, idle fuel, fuel cost and cost per mile. Estimate Trucking Fuel Surcharge Estimate per-mile trucking fuel surcharge, total FSC and diesel recovery margin. Estimate Quarter Mile Estimate quarter-mile ET and trap speed from race weight and horsepower. Estimate Machine Shop Rate Estimate loaded shop hourly rate from labor, overhead, utilization and margin. Estimate Machining Cost Estimate CNC part cost from material, setup, cycle time, shop rate and markup. Estimate Casting Yield Estimate casting yield, melt charge, return metal and metal cost per accepted casting. Estimate Weld Cost Per Inch Estimate weld cost per inch, per foot and total job cost from deposition and shop rates. Estimate Powder Coating Coverage Estimate powder coverage, pounds to plan and coating material cost from area, film thickness, SG and transfer efficiency. Estimate Anodizing Amp-Hour Estimate anodizing rectifier current, amp-hours and runtime from area, film thickness, current density and efficiency. Estimate Electroplating Thickness Estimate plating thickness, time, amp-hours and deposited metal mass from Faraday-law process inputs. Estimate Groove Weld Area Estimate groove weld area, volume, deposited metal and filler from joint prep geometry. Estimate Aircraft Range & Endurance Estimate aircraft endurance, reserve time and still-air range from fuel and burn rate.
Planners
18 toolsTakeoff and workflow helpers for parts, material, fleet, shop and field work.
Plan Panel Glue-Up Plan panel strips, boards, clamps, waste and cost for woodworking glue-ups. Plan Cabinet Door Size Plan overlay or inset cabinet door sizes from opening, reveals and gaps. Plan Cabinet Face Frame Opening Plan face-frame openings, rails, stiles, rows and columns from frame dimensions. Plan Drawer Box Size Plan drawer-box parts from opening, slide clearance, setbacks and material thickness. Plan Deck Board Plan deck board count, rows, fasteners, linear decking and material cost. Plan Rebar Spacing Plan rebar bar counts, actual spacing, stock sticks and weight for rectangular mats. Plan Rebar Lap Splice Length Plan rebar lap splice length, available-lap margin and duplicate lap allowance. Plan Wood Fence Material Plan fence posts, rails, pickets, gate openings, concrete bags and material cost. Plan Trim Molding Plan baseboard, crown, chair rail or casing stock length, waste, leftover and material cost. Plan Veneer Coverage Plan wood veneer sheet count, matching allowance, leftover, utilization and material cost. Plan Rafter Plan common rafter length, pitch angle, overhang and rafter count. Plan Peck Drilling Plan peck count, drill depth and G83/G73-style retract overhead before programming a hole cycle. Plan Helical Ramp Entry Plan end-mill helical entry pitch, turns, ramp feed, chip load and cycle time from angle, diameter and depth. Plan Pipe Support Span Plan pipe support or hanger spacing from pipe material, size and load. Plan Pipe Trench Backfill Plan pipe trench excavation, bedding, native reuse, imported backfill and loose spoil haul-off. Plan Truckload Capacity Plan pallet positions, stack levels, cube use and payload margin in a trailer. Plan Truck Axle Load Plan cargo placement against front and rear GAWR margins. Plan Trailer Tongue Weight Plan cargo position for target tongue weight and axle-group load.
Converters
7 toolsMove between engineering units, pitches, grades and drawing scales.
Convert Mechanical Unit Converter Convert common mechanical units for length, area, volume, force, pressure, torque, power and density. Convert Hardness Conversion Finder Convert approximate steel hardness values between HRC, HV, Brinell and tensile strength table rows. Convert Surface Finish Ra/Rz Converter Convert approximate Ra, Rz, RMS and ISO N surface roughness values. Convert Gear Pitch Convert gear module, diametral pitch, circular pitch and pitch diameter. Convert Surface Feet per Minute Convert SFM or m/min and tool diameter into spindle RPM. Reference Decimal to fraction chart Convert common decimal inch values to fractions and millimeters. Reference Hardness conversion chart Cross-reference common hardness scales for shop and material work.
Lookups
16 toolsStandards tables, material data and shop reference pages for fast answers.
Look up Material Density Finder Search engineering materials by name or category, compare density units and estimate weight from volume. Look up Pipe Schedule Finder Find steel pipe OD, wall, bore, flow area and nominal weight from NPS and schedule 40 or 80. Look up Metric Bolt Torque Finder Look up metric coarse bolt torque estimates by size, ISO property class and nut factor. Look up Cutting Speed Finder Find starting turning cutting speeds by material and tool type, with quick SFM, m/min and RPM context. Look up Chip Load Finder Find starting end mill chip load by cutter diameter and material, with a quick feed-rate estimate. Reference Tap drill chart Look up tap drill sizes for common metric and unified threads. Reference Drill size chart Look up number, letter, fractional and metric drill sizes. Reference Thread pitch chart Look up common metric and unified thread pitches. Reference Cutting speed chart (SFM by material) Look up practical starting SFM ranges by material. Reference Chip load chart Look up chip-load starting points by cutter diameter and material. Reference Material density chart Look up material densities for metal, wood and engineering materials. Reference Steel pipe schedule chart Look up pipe schedule OD, wall and ID dimensions. Reference Bolt torque spec chart Look up common bolt torque starting points by grade and diameter. Reference Sheet metal gauge chart Look up sheet-metal gauge thickness by material family. Reference GD&T symbols chart Look up GD&T symbol names and practical meanings. Reference Weld symbol reference Look up common welding symbols, callout anatomy, arrow-side placement and field/all-around markers.
Calculators
5 toolsFormula-backed numeric tools for sizing, force, speed, stress and cost.
Calculate Machinist Scientific calculator with shop defaults: degree trig, nearest-1/64 fraction readout, in⇄mm conversion and a calculation tape. Calculate Kerf Width Calculate saw kerf loss, required stock length, offcut, yield and cut-loss cost. Calculate Board Feet Calculate lumber board feet, waste allowance, species-based weight and material cost. Calculate Torque Power RPM Calculate shaft power, torque or RPM from the rotating-power relationship. Calculate Spring Rate Calculate spring rate from wire size, coil diameter, active coils and material.
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