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Operation time norm calculator

Enter the time per part, the setup time and the batch size. The calculator works out total labor-hours, labor cost and how many parts a shift actually produces.

One-time machine or workstation setup for the batch

Result

Labor-hours for the batch

—

Labor cost for the batch —
Effective time per part —
Parts per shift —

Your inputs are stored in this browser, so everything is still here next time. Nothing is sent to a server.

This calculation is for informational purposes only and does not replace advice from a qualified professional. Formulas and rates may not fit your exact situation — double-check the figures before making decisions.

How it is calculated

Total time = setup time + number of parts × time per part. In labor-hours = total time ÷ 60. Labor cost = labor-hours × worker rate.

Effective time per part = total time ÷ number of parts — the time per part with setup spread across the batch. On small batches it's noticeably above the nominal operation time; on large batches it nearly matches it.

Output per shift = the integer part of (shift length − setup time) ÷ time per part — how many parts actually get made in a shift with one setup at the start.

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