shopfloormetrics.xyz

English

Manufacturing & engineering calculators

Free online calculators for manufacturing, quality and maintenance engineers

Production & OEE

OEE calculatorAvailability × performance × quality Takt time & cycle timeCustomer pace, staffing, capacity Production capacityParts per hour, shift and week Scrap rate & yieldScrap %, FPY, RTY, ppm

Quality

Cp & Cpk calculatorProcess capability, expected ppm DPMO & sigma levelDefects per million, Six Sigma

Maintenance

MTBF & MTTRTime between failures, repair time

Materials

Hardness conversionHRC, HRB, HV, HB and tensile strength Thermal expansionLength change with temperature Metal weight calculatorWeight of plate, bar, tube, hex

Electrical

AWG to mm² conversionWire size, diameter, resistance Voltage drop & cable sizeVoltage drop %, minimum mm² Electrical powerkW, kVA, kvar, cos φ

Threads & bolts

Thread chart & tap drillPitch, minor diameter, drill Bolt tightening torqueTorque and preload (VDI 2230)

Pipes, fluids & pneumatics

Pipe sizes: DN, NPS, scheduleDN ↔ NPS, Sch 40/80, inside diameter Pipe flow & pressure dropVelocity, Reynolds number, Δp Pneumatic cylinder forcePush and pull force, air demand

Machining

Cutting speed & feedSpindle speed, feed rate, Q Surface roughnessRa ↔ Rz ↔ N grade, cut-off

Guides

PPAP levels and documentsWhich documents each level needs APQP phasesPhases, outputs, control plans FMEA according to AIAG–VDA7 steps, S–O–D, action priority 8D problem solvingD0–D8 steps, root cause, timing Root cause analysis5 Whys, fishbone diagram, 80/20 MSA and gage R&R%GRR, ndc, Cg/Cgk acceptance limits SPC and control chartsChart types, Nelson rules, constants

shopfloormetrics.xyz brings together practical calculators for everyday manufacturing work: from production KPIs (OEE, takt time, capacity, scrap rate) through quality calculations (Cp, Cpk, DPMO) and maintenance metrics (MTBF, MTTR) to engineering reference charts (hardness, threads, bolt torque, pipe sizes, wire gauge).

Every calculator shows the formula and a short explanation, so results are easy to check and to explain to your team.

All calculations run in your browser; your inputs never reach us.