Turn raw activity logs into clear throughput insights. Adjust for staffing, downtime, and yield changes. Download reports fast, then optimize your workflow every day.
Net Production Time (minutes) = Total Time − (Breaks + Downtime + Setup)
Effective Units = Good Units (or Total Units − Scrap Units, or Total Units × Yield%)
Throughput Rate = Effective Units ÷ Net Production Time (then convert to per hour by multiplying by 60)
| Scenario | Total Units | Good Units | Net Time (min) | Throughput (units/hour) |
|---|---|---|---|---|
| Morning shift, light downtime | 240 | 228 | 405 | 33.78 |
| Afternoon shift, higher scrap | 210 | 189 | 390 | 29.08 |
| Short batch, heavy setup | 120 | 118 | 150 | 47.20 |
Throughput describes how many finished units you deliver per unit time. This calculator uses effective units and net production minutes to avoid misleading averages. For example, 228 good units over 405 net minutes equals 0.563 units per minute, or 33.78 units per hour. Track the unit label consistently, then compare shifts, teams, or product types using the same definition of completion. It highlights where time losses quietly reduce capacity today.
Quality matters because output that fails inspection consumes time twice. Enter Good Units when you have verified counts. If you only know scrap, the calculator estimates good units as Total minus Scrap. When neither is available, yield percent provides a defensible proxy for effective output. A 95% yield on 240 completed units becomes 228 effective units, aligning throughput reporting with customer-ready work instead of raw activity. Keep this rule consistent always.
Time inputs can be entered as total minutes or as start and end timestamps. The calculator then subtracts breaks, downtime, and setup to produce net time. Consider an eight-hour window of 480 minutes with 45 minutes break, 30 minutes downtime, and 15 minutes setup. Net time becomes 390 minutes, raising the importance of reducing interruptions rather than pushing speed. Cross‑midnight schedules are handled automatically. Capture losses in real time daily.
Beyond the rate, cycle time shows how long each unit effectively takes. It is calculated as net minutes divided by effective units, useful for process redesign. Labor normalization adds context when staffing changes. With 390 net minutes and three workers, labor-hours equal 19.5. If effective units are 228, efficiency becomes 11.69 units per labor-hour. Use this to evaluate training, tooling, or task allocation improvements. Monitor trends over weeks.
Targets turn measurement into management. Enter a target rate to compute attainment, helping you see whether capacity is meeting demand. Enter target units to estimate the time required at your current net rate. Scenario testing is straightforward: adjust downtime, yield, or workers and recalculate to quantify the impact before changing the workflow. Exported CSV and PDF outputs support reviews, audits, and continuous improvement logs. Share results with stakeholders and agree next actions.
Q: What does effective units mean?
A: Effective units represent customer-ready output. Use Good Units when available, otherwise Total minus Scrap. If neither is known, the calculator estimates effective output using your yield percent.
Q: Which timing method should I choose?
A: Use start and end times when you track shifts, including overnight work. Use total minutes when you already know the planned duration or when timestamps are unavailable.
Q: Why is my throughput not calculated?
A: Throughput requires positive net time and effective units. If breaks, downtime, and setup exceed total time, net time becomes zero. Fix the inputs or reduce losses.
Q: How is units per labor-hour computed?
A: Labor-hours equal net minutes divided by 60, multiplied by the worker count. Units per labor-hour equals effective units divided by labor-hours, helping compare performance across different staffing levels.
Q: Can I compare two scenarios fairly?
A: Yes. Keep the unit definition consistent, then adjust one variable at a time—such as downtime or yield. Recalculate and compare throughput, cycle time, and labor efficiency to see the true driver.
Q: What happens when I download CSV or PDF?
A: The page exports your latest calculated results from the current session. Nothing is stored permanently on the server. Recalculate if you refresh, clear sessions, or change browsers.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.