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Safety Stock Calculator

How much buffer to hold against demand swings and supplier delays — sized from your variance, not a thumb rule.

Free foreverPrint & PDFRuns offline
units
units
Day-to-day variation in units sold.
days
%
% of reorder cycles with no stock-out — 90 to 99.5 are the working range.

Result

How it works

Normal-distribution safety stock — Z from your chosen service level. It assumes demand is independent day to day; for lumpy B2B orders, treat this as the floor.

Generated for business use — you are responsible for the figures. Check current GST rules / your CA for compliance.

Enquire Ultra Z computes this per SKU from real history →

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