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Inventory days of cover

Estimate how long current usable inventory can serve your average daily demand.

Your starting point

LOCAL · PRIVATE

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A little more clarity

RESULT

Your result will appear here.

Run the sample to see how it works.

FROM INPUT TO ANSWER

Use this tool

  1. Enter on-hand and reserved units.
  2. Enter sales and the number of days over which those sales occurred.
  3. Calculate unreserved coverage at the observed average rate.
WHAT THE NUMBERS MEAN

Reading your result

Days of cover is zero when all stock is reserved. It assumes observed demand continues and no replenishment arrives.

UNDER THE HOOD

How this works

(On hand − reserved) ÷ (observed sales ÷ observation days).

Use the units shown beside each field. For monetary amounts, use one currency throughout; calculations do not convert currencies. Results normally display up to two decimal places. Nonzero values below 0.01 use up to six significant digits; values below 0.000001 use scientific notation (for example, 1E-7 means 0.0000001). Rankings use unrounded values, so displayed scores can look equal without being tied. CSV downloads retain numeric precision. Monetary rounding uses half-away-from-zero. Inputs or results beyond supported precision are rejected.

BEFORE YOU USE THE RESULT

Assumptions & limits

No seasonal or demand forecast. Reservations cannot exceed stock; observed sales must be positive.

Required numeric fields reject blank, malformed and out-of-range values; negative values are allowed only for inventory position. Whole quantities are validated where units must be indivisible.

Results are planning aids based on the values you enter. Check important decisions and documents before using or sharing them.

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