Milling Speeds & Feeds Calculator
Calculate spindle RPM and table feed from cutting speed, tool diameter, flute count, and chip load.
Formula library / interactive tools
Manufacturing Calculators
Practical calculators for machining, fabrication, welding, laser processing, multi-axis work, and additive manufacturing. Each tool shows its formula, assumptions, units, and production checks.
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Try a process, formula name, or unit such as RPM, bend, heat input, or 5-axis.
Try a process, formula name, or unit such as RPM, bend, heat input, or 5-axis.
Core Calculators
Tap Drill Size Calculator
Estimate starting tap drill diameters for metric and Unified 60-degree cut threads.
Sheet Metal Bend Allowance & Bend Deduction Calculator
Calculate bend allowance and bend deduction from angle, radius, thickness, and K-factor.
Weld Heat Input Calculator
Estimate arc energy per unit length from voltage, current, travel speed, and an efficiency factor.
Machining & CNC Operations
Live
Milling Speeds & Feeds Calculator
Calculate spindle RPM and table feed from cutting speed, tool diameter, flute count, and chip load.
RPM · mm/min · m/min · SFM · IPMOpen calculator →
Planned
Drilling RPM & Feed Calculator
Calculate drilling spindle speed, feed per revolution, and penetration rate.
RPM · mm/rev · IPR · mm/minIn development
Live
Tap Drill Size Calculator
Estimate starting tap drill diameters for metric and Unified 60-degree cut threads.
mm · in · thread engagementOpen calculator →
Planned
Machining Time Calculator
Estimate cycle time from cut length, feed rate, approach, rapids, and tool changes.
min · sec · mm/min · IPMIn development
Live
Material Removal Rate & Spindle Power Calculator
Estimate material removal rate and approximate spindle power from cutting conditions.
cm³/min · in³/min · kW · HPOpen calculator →
Live
Radial Chip Thinning Calculator
Estimate chip-load compensation at shallow radial engagement below 50 percent of tool diameter.
fz · feff · ae/D · mm · inOpen calculator →
Sheet Metal & Forming
Planned
Sheet Metal Bend Allowance & Bend Deduction Calculator
Calculate bend allowance and bend deduction from angle, radius, thickness, and K-factor.
BA · BD · K-factor · mm · inIn development
Planned
Press Brake Tonnage Calculator
Estimate air-bending tonnage from material strength, thickness, die opening, and bend length.
tons/m · tons/ft · kN · MPaIn development
Welding & Thermal Joining
Planned
Weld Heat Input Calculator
Estimate arc energy per unit length from voltage, current, travel speed, and an efficiency factor.
kJ/mm · kJ/in · V · AIn development
Laser & Thermal Cutting
Planned
Laser Kerf Compensation Calculator
Calculate nominal profile offsets from measured kerf width and cut-side strategy.
mm · in · µm kerfIn development
Multi-Axis & Advanced Kinematics
Planned
5-Axis Rotary Feed Conversion Calculator
Convert coordinated rotary motion into inverse-time or degrees-per-minute feed values.
deg/min · 1/min · mm/minIn development
Additive Manufacturing
Planned
3D Printing Volumetric Flow & Build Time Estimator
Estimate extrusion volumetric flow, deposition limits, and approximate build duration.
mm³/s · layer time · hoursIn development
Calculator Guides
How to Calculate Milling Speeds and Feeds
Derive spindle RPM from cutting speed and cutter diameter, then calculate feed rate from flute count and chip load.
n = (vc × 1000) / (π × D)Read the formula guide →Understanding K-Factor and Bend Deduction in Sheet Metal
A practical explanation of neutral-axis position, bend allowance, bend deduction, and flat-pattern assumptions.
BA = (π / 180) × A × (R + K × T)Recent Technical Guides
Heat Input and Travel-Speed Assumptions
A practical explanation of heat input, efficiency assumptions, and why procedure-specific limits must be checked before production.
H = (η × V × I × 60) / (v × 1000)5-Axis Inverse Time Feed Mode (G93)
Understand why simultaneous rotary and linear motion may require inverse-time feed, and what the programmed value represents.
F(G93) = feed rate / coordinated path lengthReference method & editorial transparency
We explain formulas, identify assumptions, show units, disclose sponsored content, and tell readers when a value should be checked against current tooling data, equipment documentation, or a procedure-specific requirement.
Production application disclaimerEducational starting point—confirm critical values with tooling data, material specifications, machine limits, and qualified personnel before production.