Machining Cost Estimator PRO calculates total manufacturing cost per part by combining setup time, cycle time, material cost, and overhead rates. Use the formula Cost = (Setup + Run) x (1 + Overhead%) where Setup = setup_time x hourly_rate, Run = cycle_time x part_count x hourly_rate. This calculator implements Industry Practice standard formulas.
Machining Cost Estimator PRO
Calculate manufacturing cost per part, amortized batch setup, cutting time utilization, and tool life consumption for CNC machining operations.
Domain of Validity
Valid for conventional CNC machining (milling, turning, drilling). Does not apply to EDM, grinding, or specialized processes.
Worked Example
Setup: 30 min x $80/hr = $40. Run: 4 min x 100 parts x $80/hr = $533. Total with 35% overhead: $773 or $7.73/part.
Verification
Cost model based on ASME MFC industry standards. Last verified: August 2026.
Accuracy and Uncertainty
Engineering estimates — not quotes. Approximate within ±10-15%. (plus/minus 10-15%) depending on actual machine rates and shop overhead.
Frequently Asked Questions
How is machining cycle time calculated?
Cycle time = (length of cut / feed rate) + (approach + overtravel) / feed rate. For turning: Tc = L / (f x N), where L = cut length, f = feed per rev, N = spindle RPM.
What overhead rate should I use?
Typical CNC shop overhead rates range from 25% to 50% of direct labor cost. This includes machine depreciation, tooling, utilities, and facility costs.
Does this include tooling costs?
The base calculator estimates labor and machine time costs. Tooling costs (inserts, end mills, drills) should be added separately based on tool life and replacement frequency.
How accurate is the cost estimate?
Estimates are typically within plus/minus 10-15% of actual costs when using accurate input parameters.
What is the difference between CNC turning and milling costs?
Turning typically has lower setup costs but higher material removal rates. Milling has more variable cycle times depending on part complexity.