CNC Tools

CNC machining calculators for speed, feed, drilling, QC & costing.

CNC Tools is an all-in-one calculator & reference toolkit for CNC machining, programming, and shop-floor planning. Get fast, practical calculations for milling, turning, drilling, inspection, and production efficiency—right from your phone.

✅ What you can do

Cutting Parameters

Spindle Speed (RPM) Calculator

Cutting Speed (Vc) Calculator

Feed Rate Calculator (CNC)

Chip Load (fz) Calculator

Depth of Cut (DOC) Calculator

Material Removal Rate (MRR) Calculator

Surface Finish Estimator (Ra)

Tool Life Estimator (Taylor’s Equation)

Horsepower / Power Requirement Calculator

Torque Calculator (CNC)

Turning & Lathe Tools

Turning Speed & Feed Calculator

Thread Cutting Calculator (Lathe)

Taper Turning Calculator (Lathe)

Boring Bar Deflection Estimator

Parting-Off Speed Calculator

Milling & Drilling

End Mill Selection Tool

Slot Milling Parameters Calculator

Face Milling Calculator

Drilling Speed & Feed Calculator

Peck Drilling Calculator

Geometry & Programming Helpers

Bolt Circle (PCD) Calculator

Hole Pattern Generator (XY + G-code)

Arc Radius & Center Calculator

Chamfer & Fillet Calculator

Tool Path Length Estimator (Lines + Arcs + Patterns)

Cycle Time Estimator (CNC)

Materials, QC & Metrology

Hardness Conversion (HB ↔ HRC ↔ HV)

Thermal Expansion Calculator

Material Weight Calculator

Tolerance Calculator (CNC)

Fits & Clearances Calculator (CNC)

Measurement Uncertainty Estimator (CNC / QC)

Production, Cost & Efficiency

Job Cost Estimator (CNC)

Cycle Time vs Cost Analyzer (CNC)

Machine Utilization Calculator (CNC)

OEE (Overall Equipment Effectiveness) Calculator

🔓 Unlocking tools (In-App Purchase)

CNC Tools includes free tools to get started.

You can unlock all remaining premium tools with a one-time purchase inside the app (lifetime access). A Restore Purchase option is available for users who reinstall or change devices.

👷 Who it’s for

CNC operators, machinists, programmers

Production engineers & shop supervisors

Students learning machining and manufacturing

QC/inspection teams and metrology users