Calculators & tools
Tools for working on the drawing. Standards-based, no sign-up, no registration.
For design and purchasing
Experts from our team use these calculators when reviewing drawings. The data comes straight from the standards, not from approximation formulas. Where an exact conversion is not technically possible, the tools say so explicitly instead of feigning precision.
Cutting data calculator
Spindle speed, feed rate and metal removal rate for turning and milling. With guide values for eight material groups and theoretical roughness.
Hardness converter
Convert Rockwell C, Brinell, Vickers, Rockwell B and tensile strength. Based on ISO 18265, with the full comparison table.
Material designation cross-reference
German material number, EN name, old DIN name, AISI and UNS for 53 materials. Forgiving search, also for V2A or Ms58.
Bolt circle calculator
X/Y coordinates for holes on a bolt circle, with hole spacing, sketch and output as NC blocks.
Weight & material requirement
Weight of round, tube, hex, square and flat bar. Plus parts per bar and bars needed for a batch.
Taper calculator
Setting angle, included angle and taper ratio from three dimensions. With Morse and steep tapers as presets.
Countersink and chamfer calculator
Countersink diameter and depth, chamfer in X and Z, drill point length. With countersink dimensions for screws M3 to M20.
Tolerance calculator ISO 286
Deviations and limits for holes and shafts. Fit type, clearance and interference. Including the full IT tolerance chart.
Ra/Rz converter
Convert surface roughness in both directions, with the ISO 1302 roughness grade and the machining process that achieves it.
Thread Calculator
Tap drill, pitch, clearance hole and thread engagement for metric threads. 40 sizes from M1.6 to M36, including blind hole layout.
Material Selector
Filter 25 materials by strength, corrosion, temperature and machinability. Including what the choice will cost you in production.
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