Ochrequiet invoicing

Free tool

Know exactly when to reorder.

Enter your average daily usage and supplier lead time, add a safety buffer — entered directly or worked out from your worst case — and get the stock level that should trigger your next order.

Nothing you type here ever leaves your browser. There's no server behind this page — every figure is calculated locally, on your device, the same local-first idea behind the Ochre app.

Reviewed 2026-08-11

How many units you typically sell or use in a day, on average.

How many days it typically takes a new order to arrive, from order to receipt.

The buffer you want on hand for when usage or lead time run worse than average.

Results

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Questions

What is a reorder point?
The stock level at which you should place your next order — low enough that you're not carrying excess inventory, high enough that you don't run out before the new stock arrives. It's your average usage during the supplier's lead time, plus a safety buffer for when usage or lead time run higher than average.
What is safety stock, and why two ways to get it?
Safety stock is the buffer that protects you when reality is worse than average — a supplier running late, or a sudden sales spike. You can enter it directly if you already know the number, or derive it from your worst-case usage and lead time compared to your averages, which is more work but doesn't rely on a guess.
What is days of cover?
How many days your reorder point's stock would last at your average daily usage. It's a sanity check: if that figure looks far too long or too short for how your supplier actually behaves, revisit your lead time or usage inputs before you rely on the reorder point.
How is reorder point different from Economic Order Quantity?
Reorder point answers WHEN to order — the stock level that triggers a new order. Economic Order Quantity answers HOW MUCH to order once you've decided to. They're companion numbers, not alternatives to each other; most reorder systems use both together.
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What this page cannot do

Reordering is a decision, not a formula.

This works out a threshold from the lead time and average daily use you supply, with no view of what you actually hold. Ochre stores a stock quantity on every product, and a purchase order you send to a vendor is a real, dated document — but deciding when to reorder is still yours; there is no automation that places an order for you.