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Inventory reorder point calculator

Calculate when to reorder inventory based on lead time demand and safety stock.

Your inputs

Results

Reorder point
420 units
Lead time demand + safety stock
Lead time demand
280
Safety stock
140
When your on-hand inventory hits the reorder point, place the next PO. Safety stock covers demand spikes and supplier delays โ€” 7 days is typical, 14+ for long-lead overseas suppliers.

How to use this calculator

Fill in your own numbers in each field. Results update live. The chart shows how each component of the calculation contributes to the final answer so you can see what's driving it.

What this doesn't include

Edge cases โ€” currency conversion, regional duties, weight-based shipping exceptions โ€” can move real-world numbers 5โ€“15%. Use this as a planning baseline, not a final quote. Always confirm fees in your platform's seller dashboard.

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Frequently asked questions

How accurate is the reorder point calculator?

The math is exact; the answer depends on the inputs you provide. Check it against your latest platform reports before making budget decisions.

Is my data stored anywhere?

No. All computation runs in your browser โ€” nothing you type leaves your device. Only anonymous pageview stats are collected.

Can I save or share my result?

Yes โ€” use the Download as PDF button on the calculator card to save or share a clean copy.

Are these fees current?

Default values reflect published fee schedules as of 2026. Platforms change fees โ€” always verify against your current rate card.

Where does the math come from?

From published platform fee schedules, public ecom benchmark reports, and our own merchant data. We update defaults when platforms shift pricing.

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