Everything here came from a real-world need,
and are now available when you need it.
Every calculator here is free, runs entirely in your browser, and came out of an actual problem on an actual build — sheet metal flat patterns and K-factor, thread milling pitch diameter offset, clearance and counterbore sizes, ISO 286 fits, plasma cutting cost per part, rolled throughput yield, shop capacity and lead time, and part numbering. No sign-up, no data leaves your machine.
Naming, numbering, and file discipline before the work starts.
Part numbers, complete file families, and project folder trees from a project code, date, and description — deterministic naming with no counter to maintain.
Dimensions, fits, and hardware decisions made at the drawing stage.
ISO 286 hole and shaft limits with the resulting clearance, transition, or interference band — plus aim points that tell you where to machine inside each tolerance.
Drill size straight out of the minor-diameter window, then the Pitch Diameter Offset from your cutter's crest flat — the exact number to type into CAM.
Clearance, counterbore, and countersink dimensions for inch and metric socket head and flat head screws — the numbers you need before the drill touches the part.
Time, cost, and machine planning before the job runs.
Per-part cut time and cost before the torch fires — arc-on time, pierce dwell, consumable amortization, shop rate, material, and batch totals.
Rolled throughput yield across a routing, true staged cost per good part, and the exact number of blanks to start to hit a quantity with confidence.
Attended vs unattended time across the job queue, slack against your real available hours, and the honest lead time to quote instead of touch time.
Bench math for forming, bending, and assembling the part.
K-factor driven flat-pattern math for press-brake work — bend allowance, deduction, and blank length, plus a reverse solver that dials in the K your brake actually produces.
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This shelf grows with the shop. If there's a repetitive bit of math in your process, we'll build it and put it here.
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