# Stock Runway Calculator

Measure unreserved stock against average daily demand and a supplier wait.

[Open this tool](https://whatson.pk/stock-calculator/)

Category: Seller Pricing & Profit

Reserved units are not freely available for new orders. A runway estimate should begin with unreserved inventory.

Enter current stock, reservations and average daily demand. Compare the available days with the supplier waiting time.

## Inputs and controls

* On hand stock (units). Allowed range: 0 to 1000000
* Reserved stock (units). Allowed range: 0 to 1000000
* Expected daily demand (units/day). Allowed range: 0 to 1000000
* Days until next receipt (days). Allowed range: 0 to 3660

## How to use

* Enter on hand stock, reserved stock, expected daily demand and days until next receipt.

* Select Calculate result. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.


## Why use this tool

The available stock basis helps distinguish inventory physically present from units already promised.


## Before relying on the result

Incoming stock is not included before receipt. Daily demand is an entered average; zero demand leaves runway undefined rather than promising permanent stock availability.


## Tool limitations

Incoming stock is not included before receipt. Daily demand is an entered average; zero demand leaves runway undefined rather than promising permanent stock availability.

## Questions

### Does incoming stock extend today's runway?

Not before it is received in this model. Review incoming deliveries separately from currently available stock.

### What should I check before using Stock Runway Calculator?

Check On hand stock, Reserved stock, Expected daily demand and Days until next receipt. Use the exact units shown beside the controls and replace any example values with your own inputs.

Source page last modified (UTC): 2026-10-01T18:05:21+00:00

This profile describes the tool. It does not execute it or supply a professional certification.