Free Par Level Calculator
Calculate the ideal par level for any office supply or breakroom item. Enter your daily usage and lead time to find the minimum stock level you should always maintain.
Enter your values
How many units of this item are consumed per day on average.
Days from placing an order to receiving delivery.
Extra stock to cushion against demand spikes or delayed deliveries. Commonly 20–50% of lead time demand.
Set par levels in OfficeStoreApp
Enter this par level as the Minimum Stock for each item in OfficeStoreApp. You'll get an alert the moment any item drops to or below its par level — across every site and store.
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What is a Par Level?
A par level (short for "periodic automatic replenishment level") is the minimum quantity of an item you should always have on hand. When stock falls to the par level, you need to reorder immediately to avoid running out before the next delivery arrives.
Par levels are widely used in breakroom and pantry management, office supply stockrooms, and hospitality. The term comes from hospitality (bars, restaurants) where it means the stock needed to operate through a single service period.
The Par Level Formula
- Average Daily Usage: Units consumed per day on average.
- Lead Time: Days between placing an order and receiving it.
- Safety Buffer: Extra units to absorb demand spikes or delivery delays. Typically 20–50% of your lead time demand.
Par Level vs Reorder Point vs Minimum Stock
These terms are often used interchangeably, but there are subtle differences:
| Term | Meaning | Common In |
|---|---|---|
| Par Level | Minimum stock to hold; reorder when you hit it | Breakrooms, pantries, hospitality |
| Minimum Stock | Same concept — floor below which you act | Warehouses, procurement software |
| Reorder Point | Trigger to place a purchase order | Formal procurement, ERP systems |
In practice, par level and minimum stock are the same thing — the quantity that triggers a reorder action. "Reorder point" is a more formal procurement term that may be set higher than minimum stock to account for lead time from a separate safety stock floor.
Par Level Examples for Office Supplies
| Item | Daily Usage | Lead Time | Par Level (est.) |
|---|---|---|---|
| Coffee pods (25-person office) | 30 pods | 3 days | 120 pods |
| A4 paper reams | 0.5 reams | 5 days | 4 reams |
| Hand soap pumps | 0.2 units | 7 days | 3 units |
| Ballpoint pens | 1 pen | 5 days | 8 pens |
Tips for setting accurate par levels
- Review par levels quarterly — usage patterns change with headcount and seasons
- Set a higher safety buffer for items that cause the most disruption when out of stock (e.g. coffee, toilet rolls)
- Measure actual consumption for 2–4 weeks before setting a par level for a new item
- Adjust for delivery reliability — if your supplier often runs late, increase your lead time estimate by 20–30%