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Free lead-time calculator for supply planning teams. Estimate base and risk-adjusted lead times acrosssupplier, transport, customs, handling, and final delivery stages to improve replenishment decisions.
Last updated: April 20, 2026
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Recommended lead time
66 days
9.4 weeks (base: 57.0 days)
Supplier + origin
15.0 d
Transit
28.0 d
Customs + destination
6.0 d
Variability allowance
8.6 d
Planning estimate only. Port congestion, capacity shifts, and documentation quality can change actual lead times.
Estimate practical lead times for reorder-point and safety-stock calculations.
Compare transit assumptions and resulting total lead-time differences by mode.
Add realistic variability buffers for unstable lanes and uncertain operations.
Include customs clearance assumptions in end-to-end timeline estimates.
Break down lead time by stage to identify delays and target improvements.
Account for destination handling and final delivery in planning commitments.
Ocean-mode replenishment with moderate-risk reliability profile and staged handling assumptions.
Base lead time
57.0 d
Variability
8.6 d
Recommended lead time
66 d
Weeks
9.4
The calculator sums stage-level durations from supplier processing through final delivery. It then applies a reliability-based variability factor to produce a practical recommended lead time for planning.
base lead time = supplier + origin + transit + customs + destination + final + buffer
variability days = base lead time x reliability variability factor
recommended lead time = ceil(base lead time + variability days)
lead time weeks = recommended lead time ÷ 7
Need related planning tools? Explore our supply chain efficiency calculator and sea freight transit time calculator.
Get Custom Calculator for Your PlatformRecommended lead time: 66 days
Equivalent to approximately 9.4 weeks.
Share it with procurement, planning, and operations teams.
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