Free Engineering & PLM tools
126 templates, calculators, worksheets and reference tables. Each runs in your browser and exports to PDF, Excel, Word or CSV.
Templates and forms
SAP Document Info Record Template
Capture the key fields of a document info record before entering it in CV01N, with links to material, BOM and change number.
SAP Engineering Change Request (ECR) Template
A structured change request form that captures the reason, impact on stock and open orders, and approvals before a change number is created.
Part Numbering Scheme Generator Template
Fill in your company rules and get a one-page part numbering standard with format, class codes, examples and governance rules.
CNC Workholding and Fixture Plan Template
A fill-in plan for how each CNC operation locates and clamps the part, with datums, clamp forces and risk notes.
Engineering Drawing Release Request Template
A release request form that records revision, tolerance and GD&T review status, affected parts and approvals before a drawing goes to the shop floor.
Datum Reference Frame Definition Template
A one-page record of how datums A, B and C are established, which degrees of freedom they constrain and how the fixture and CMM should locate the part.
Tolerance Analysis Report Template
A design review document that records the assembly requirement, analysis method, assumptions, results and decision for a tolerance study.
Drawing Tolerance Clarification Request Template
A structured form to raise a technical query about a drawing tolerance, datum scheme or GD&T callout, with the proposed interpretation, impact and a disposition signature.
Engineering Change Request (ECR) Form Template
A fill-in ECR form that captures the reason for change, affected parts, risk and board approvals, ready to export as PDF or Word.
Engineering Change Order (ECO) Template
An ECO and ECN document template with affected items, effectivity, stock disposition and implementation tasks, exportable as PDF or Word.
Part Numbering Policy Template
A fill-in policy document that defines how part numbers are structured, assigned, revised and retired, exportable to Word or PDF.
Engineering Change Board Meeting Minutes Template
Fill in a clean ECB or CCB meeting record with decisions per change, actions and sign-off, and export it to PDF or Word.
New Part Introduction Request Form Template
A request form that gives engineering and master data teams everything needed to create a new part in the ERP correctly the first time.
Drawing Release Package Transmittal Template
A transmittal sheet that lists every drawing, revision and file sent in a release package, with a receipt acknowledgement line.
Engineering Change Shop Floor Notice Template
A one page notice that tells production what changed, from which work order, and what to do with old-revision parts.
Stainless Steel Grade Selection Datasheet Template
A fill-in datasheet that records service conditions and the proposed stainless grade, with a quick reference of common grades and UNS numbers.
Material Substitution Request Form Template
Record why a material grade is being replaced, compare properties and capture engineering and quality approval.
PCBA Engineering Change Notice Template
A fill-in ECN for PCB assembly changes covering BOM, fabrication data, process impact, inventory disposition and approvals.
Medical Device Change Control Request Template
Change request form with impact assessment on regulatory filings, risk files, validations and labeling.
Worksheets
SAP Super BOM Design Worksheet
Lay out every component of a 150 percent BOM with its selection condition, quantity and cost, then see how many items are always present versus conditional.
SAP Change Master and Revision Level Log
Track change numbers, validity dates, revision levels and the number of BOMs and routings each engineering change touches.
SAP Engineering Change Affected Materials Impact Worksheet
A row by row worksheet of affected materials with quantities, cost and disposition that totals the financial impact of a change.
Cloud MRP BOM Data Cleanup Worksheet
Clean each BOM line with unit of measure, scrap allowance and cost before loading data into MRPeasy, Katana, Odoo, ERPNext or Fishbowl.
DFMEA Worksheet Template (Excel Export)
A design FMEA table that follows the function, failure, effect and cause chain and ranks lines by risk score.
BOM Explosion Requirements Worksheet
Explode a bill of materials into component requirements, with quantity per, scrap allowance and extended cost for each line.
CNC Program Revision Log Worksheet
An editable log of CNC program changes with revision, reason, proveout status and approver, exportable to Excel.
Casting Pattern Allowance Worksheet
Compute pattern dimensions from finished size, machining stock per side and shrink percent, feature by feature, and export the table to Excel.
Hole and Shaft Fit Clearance Worksheet
An editable worksheet that computes minimum and maximum clearance (negative means interference) for each hole and shaft pair from their limit sizes.
BOM Comparison Worksheet (Revision A vs B)
Enter quantities and costs for each BOM revision and get the quantity change and cost delta per component, ready to export to Excel.
Drawing Revision Log Worksheet
An editable revision history log for engineering drawings with ECO reference, change description, approver and release date.
PLM Selection Scorecard Worksheet
A weighted scorecard to compare three PLM candidates on change management, BOM, CAD and ERP integration, cost and vendor fit.
Engineering Change Open Stock Disposition Worksheet
List every affected part with on-hand, WIP and on-order quantities, pick a disposition, and see the cost exposure of the change.
Engineering Change Implementation Task Tracker Worksheet
Track ECO implementation tasks by owner and due date, with planned and actual hours and a late-task indicator.
Design Review Comment Resolution Log Worksheet
Log every design review comment with severity, owner, response and due date, and see how many remain open.
ECO Backlog Aging Worksheet
List open ECOs with stage, owner, age and target days, and see overdue days and engineering hours at a glance for the weekly change board.
Fastener Torque Spec Conversion Log Worksheet
Record each fastener torque once in ft-lb and get N-m, in-lb and kgf-m for work instructions across plants and suppliers.
Design History File Index Template
An editable index of the records that make up a medical device design history file, with status, owner and review date for each document.
Medical Device Design Input Traceability Matrix Worksheet
Editable traceability matrix linking each design input to its design output, verification, validation and risk control.
Calculators and simulators
SAP Engineering Change Obsolescence Exposure Calculator
Quantify the write-off risk of replacing a component and estimate when old stock runs out so you can set the right effectivity date.
BOM Accuracy Calculator
Compute BOM and line-level accuracy from an audit sample and estimate the rework effort to reach your target.
BOM Error Cost of Poor Quality Calculator
Quantify what BOM line errors cost when they are found late, and see the chance that a released BOM is completely clean.
Part Number Keyspace Capacity Calculator
Test a part numbering scheme before you adopt it: total capacity, usable numbers after reserves and years until exhaustion at your growth rate.
Weibull Reliability and B10 Life Calculator
Enter Weibull shape and scale to get reliability at a mission time, the B-life at a chosen failure percentage and the instantaneous hazard rate.
Series and Parallel System Reliability Calculator
Multiply component reliabilities in series, add redundant parallel units to the weakest block and see how system reliability responds.
APQP Tooling Cavity Count Calculator
Size the number of cavities per tool from annual demand, peak factor, cycle time, OEE and available hours before you commit to a tooling quote.
Assembly Tolerance Stack Worst Case vs RSS Calculator
Add up the contributors in a linear stack and see the minimum gap by worst case, root-sum-square and a 1.5x modified RSS.
Metric Thread Dimensions and Tensile Stress Area Calculator
Basic and design dimensions for an ISO metric thread plus the tensile stress area and breaking load for a given property class.
Weld Metal Volume and Weight Calculator (V-Groove)
Computes weld metal area, volume and weight per meter and for the full joint from plate thickness, root gap, groove angle and reinforcement.
Preheat Temperature and Carbon Equivalent Calculator
Enter steel chemistry to get IIW carbon equivalent, Pcm and an indicative preheat temperature adjusted for thickness.
Welding Heat Input Calculator
Compute arc energy and net heat input from amps, volts, travel speed and process efficiency, and see how speed changes the result.
Fillet Weld Size and Strength Calculator
Find effective throat and weld metal capacity of a fillet weld from leg size, length and filler classification, with LRFD and ASD design values.
Bolt Circle Hole Coordinates Calculator
Enter the pitch circle diameter, hole count and start angle to get the X and Y position of any hole plus the chord between neighbours.
Linear Thermal Expansion Calculator (Two Materials)
Find how much a part grows between two temperatures, and how much two mating materials move relative to each other.
Press Fit Interference Pressure and Force Calculator
Estimate contact pressure, hub hoop stress, press-in force and slip torque for a solid shaft pressed into a hub.
Bonus Tolerance (MMC) Position Calculator
Calculates the bonus tolerance gained as a feature departs from maximum material condition and compares the total allowed position zone to the measured error.
GD&T Bonus Tolerance Calculator (MMC and LMC)
Enter the size limits, the actual feature size and the position tolerance at MMC. Get the bonus tolerance, the total allowed position zone and a pass/fail against measured X and Y offsets.
Shaft and Hole Clearance Fit Limits Calculator
Type in nominal size and the hole and shaft deviations in micrometres. See minimum clearance, maximum clearance, mean clearance and whether the fit is clearance, transition or interference.
Bilateral and Unilateral Tolerance Converter
Turn any plus/minus tolerance, even an unequal or one-sided one, into upper and lower limits, a mid-limit target and an equal bilateral equivalent that CNC programmers can aim at.
Metric Thread Pitch Diameter and Tap Drill Calculator
Enter major diameter and pitch for any ISO metric thread. Get basic pitch diameter, minor diameters, tensile stress area and a tap drill size for your chosen thread engagement.
Minimum Wall Thickness Calculator with Concentricity
Combine outside diameter tolerance, bore tolerance and a coaxiality zone to see the true thinnest wall that can occur, and the margin against your minimum wall requirement.
Shrink Fit Heating Temperature Calculator
Calculate how hot a bore must be to slip over a shaft: required expansion, temperature rise and final oven temperature, with the material limits that matter.
GD&T Virtual Condition and Resultant Condition Calculator
Enter a pin and a hole with their MMC and LMC sizes and position tolerances at MMC. Get virtual conditions, resultant conditions and the guaranteed clearance and worst case gap.
Engineering Change Cost Impact Calculator
Estimate the full one-time cost of an engineering change and the payback period against annual savings before you approve it.
Last Time Buy Quantity Calculator
Calculate the last time buy quantity and the investment and carrying cost for a part reaching end of life.
ECO Cycle Time and Backlog Calculator
Use Little's law to turn open ECO count and closure rate into average cycle time, backlog clearing time and the engineering headcount your change flow needs.
Engineering Change Cutover Cost Calculator
Decide whether to cut an engineering change in immediately or let old stock run out, based on scrap, rework and the weekly benefit of the new design.
Design Change Cost Escalation Calculator
Model the cost of the same design change at different lifecycle phases, with tooling and affected-unit rework, to justify earlier design reviews.
PLM Total Cost of Ownership Calculator
Add up licences, viewer seats, hosting, admin staff, implementation, ERP integration and training to see the true multi-year cost of a PLM system.
Design-to-Cost Target Gap Calculator
Start from target price and margin, derive the allowable cost, and see how much cost the design still has to take out per unit and per year.
Part Number Proliferation Cost Calculator
Quantify what duplicate part numbers cost in record maintenance and excess inventory, and how fast a clean-up project pays back.
Steel and Aluminum Plate and Bar Weight Calculator
Weight and material cost of plate, round bar, square bar and hex bar in common metals, with kg per metre and a thickness sweep chart.
Torque Conversion Calculator
Convert any torque value between Newton-metres, pound-feet, pound-inches, kgf-m, kgf-cm, ounce-inches and Newton-centimetres.
Pressure Conversion Calculator
Convert pressure between psi, bar, MPa, kPa, atm, kgf/cm2, mmHg and inches of water in one step.
Bolt Preload and Tightening Torque Calculator
Work out target preload and tightening torque for a metric bolt from its property class, tensile stress area, preload percentage and nut factor.
Beam Deflection and Bending Stress Calculator
Compute midspan or tip deflection, peak bending moment and bending stress for a simply supported or cantilever beam in steel, stainless, aluminum or titanium.
Wire Harness Voltage Drop and Power Loss Calculator by AWG
Find voltage drop, percent drop and I squared R loss in a copper wire run by gauge, current, length and conductor temperature.
PCB Trace Width and Current Capacity Calculator (IPC-2221)
Enter current, allowed temperature rise and copper weight to get the minimum external or internal trace width from the IPC-2221 formula.
PCB Trace Width Calculator (IPC-2221)
Find the minimum trace width for a given current, allowed temperature rise and copper weight using the IPC-2221 relationship.
Resistor Power Derating Calculator
Check whether a chosen resistor is safely derated at your operating voltage and ambient temperature.
Fiber Optic Numerical Aperture and V-Number Calculator
Compute NA, acceptance angle, relative index difference, V-number, cutoff wavelength and mode count for a step-index fiber.
Optical Lens Focal Length Calculator
Find focal length from surface radii and glass index, then image distance, magnification, f-number and diffraction-limited spot size.
Wavelength to Frequency Converter
Convert a vacuum wavelength in nanometers to optical frequency, photon energy, wavenumber, period and wavelength inside glass, water or fiber.
Heat Exchanger LMTD and Required Area Calculator
Find heat duty, LMTD, cold stream flow and the area needed for a given overall U value.
EV Busbar Weight, Cost and Power Loss Calculator
Size a rectangular copper or aluminum busbar for weight, blank cost, resistance, voltage drop and resistive loss at a given current.
Battery Pack Series Parallel Configuration Calculator
Enter series and parallel counts and cell data to get pack voltage, Ah, kWh, cell count, cell mass and power at a chosen C rate.
Reference tables
SAP BOM Usage and Item Category Reference
Look up the standard BOM usage keys and item category codes, with a plain note on what each controls.
ISO 286 IT Tolerance Grade Table (IT5 to IT9)
Standard tolerance band widths in micrometres for IT5 to IT9 across nominal sizes up to 250 mm.
Sheet Metal Minimum Bend Radius by Material Reference
Typical minimum inside bend radius for common sheet metal alloys and tempers, shown as a multiple of material thickness, with cracking notes.
Press Brake V-Die Opening and Minimum Flange Reference
Rule-of-thumb V die opening, minimum flange and approximate inside radius for mild steel air bending, by material thickness.
Sheet Metal Density and Weight per Area Reference
Density and weight per area per millimetre of thickness for steel, stainless, aluminum, copper, brass and titanium sheet.
Mold Steel Grades Selection Reference
Common mold steels and cavity materials with typical working hardness and the situations where each is normally chosen.
Injection Mold Gate Types Reference
A comparison table of common mold gate types with where each works best, trade-offs and how the gate is removed.
ISO 286 IT Tolerance Grades Table
Look up the ISO 286 standard tolerance width for grades IT5 to IT11 across nominal size ranges up to 500 mm.
GD&T Symbols Reference Table
A searchable list of the 14 GD&T geometric characteristics and common modifiers with category, datum use and tolerance zone shape.
ISO 2768 General Tolerances Table
Look up the default tolerance for dimensions with no individual tolerance, by size range and ISO 2768-1 class.
ISO 2768-1 General Linear Tolerances Reference
Look up the permitted deviation for any linear dimension, external radius or chamfer under ISO 2768-1 tolerance classes fine, medium, coarse and very coarse.
ISO 2768-2 General Geometrical Tolerances Reference
Look up default flatness, straightness, perpendicularity, symmetry and circular run-out values for ISO 2768-2 classes H, K and L.
Metric Tap Drill and Clearance Hole Size Reference
Lookup chart of metric tap drill sizes plus fine, medium and coarse clearance holes for common fasteners from M1.6 to M30.
Typical Achievable Tolerance by Manufacturing Process Reference
Planning reference of the IT grade and approximate tolerance band each common manufacturing process can hold on a 25 mm feature.
Engineering Drawing Sheet Size Reference Table
Searchable chart of ASME Y14.1 and ISO 5457 style drawing sheet sizes in inches and millimetres, with the nearest equivalent in the other system.
Engineering Drawing Line Types Reference
Lookup table of common drawing line types, their weight, pattern and what each is used for on a part or assembly drawing.
Engineering Change Effectivity and Disposition Terms Reference
Searchable table of ECO and ECN vocabulary: effectivity types, stock disposition choices, change classes and related document terms, with how each shows up in an ERP.
Metal Density Reference Table
Searchable table of nominal densities for common engineering metals in three units, with typical use notes.
Steel Grade Equivalents Reference (AISI, EN, JIS)
Nearest-equivalent cross reference between AISI/SAE, European EN numbers and names, and JIS grades for common steels.
Aluminum Alloy Reference (Series, Temper, Density)
Quick lookup of common wrought and cast aluminum alloys with series, tempers, density, weldability and typical applications.
Fractional Inch to Decimal and mm Chart
Every 1/32 inch from 1/32 to 1 inch with decimal inches and exact millimetres, searchable and exportable.
Pipe NPS Schedule 40 and 80 Dimensions and Weight Reference
NPS 1/2 to 12 with DN, outside diameter, Schedule 40 and 80 walls and calculated steel weight per metre.
Metric Bolt Property Class Reference (ISO 898-1)
Strength values for the common metric bolt property classes with a computed yield-to-tensile ratio.
Thermal Expansion and Elastic Modulus by Material
Typical CTE and elastic modulus for common metals and plastics, with growth per metre for a 100 degree C rise.
Steel Sheet Gauge Thickness and Weight Chart
Gauge to thickness in inches and mm with calculated carbon steel weight per area.
IP Ingress Protection Code Reference (IEC 60529 and ISO 20653)
Look up the two digits of an IP code under IEC 60529 and the automotive IP6K9K style ratings, with a plain summary of each test.
IP Ingress Protection Code Reference (IEC 60529)
Look up what every IP digit means for solids and liquids, so enclosure, motor and sensor specs on your machine are unambiguous.
IEC 60204-1 Wire and Pushbutton Colour Reference
Conductor, pushbutton and indicator lamp colours used in machine control panels, in one searchable chart.
China Steel, Aluminium and Copper Grade Equivalents Reference
Cross-reference common Chinese material grades to approximate AISI/ASTM and EN designations before you accept a substitution.
Checklists
SAP Engineering Change Number Checklist
Walk through a change master from reason and effectivity to affected objects and release so no BOM, routing or document is changed without a number.
Sheet Metal DFM Design Review Checklist
A pre-release checklist for sheet metal parts covering cutting, bending, hardware, tolerance and finishing issues that cause rework and quote changes.
Engineering Drawing Review Checklist
A tickable checklist for checking a manufacturing drawing before release: title block, dimensions, tolerances, GD&T, notes and revision.
Design for Manufacturing Tolerance Review Checklist
A pre-release checklist for reviewing tolerances on a drawing for manufacturability, function and inspectability.
Engineering Design Review Checklist
A scored checklist for design reviews covering requirements, manufacturability, supply chain, test and release readiness.
ECO Implementation and Closure Checklist
Verify that BOMs, drawings, stock, suppliers, work instructions and quality records are all updated before you close an engineering change.
Engineering Change Implementation Readiness Checklist
Pre-release checklist covering documents, stock disposition, suppliers, ERP data, shop floor and quality actions for an engineering change order.
Design for Manufacturability Review Checklist
Design review checklist covering tolerances, materials, processes, assembly, inspection, supply chain and cost for a new or changed part.
Electronics BOM Scrub Checklist
A grouped checklist for scrubbing an electronics BOM before RFQ or release: data integrity, sourcing, lifecycle, compliance and assembly readiness.
Assessments
GD&T Readiness Assessment for Design Teams
Score how well your team applies GD&T and tolerancing practice, from training and standards to supplier feedback and inspection alignment.
Engineering Change Management Maturity Assessment
Ten-question self-assessment that scores how controlled your engineering change process is and gives practical next steps for your score band.