# Inventory Turnover & Days Calculator

Relate period cost of goods sold to average inventory at cost.

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

Category: Seller Pricing & Profit

Inventory turnover needs cost of goods sold and inventory valued on a consistent cost basis.

Choose the period and enter average stock at cost. Compare turnover and inventory days against that same period.

## Inputs and controls

* Opening inventory value at cost (PKR). Allowed range: 0 to 1000000000
* Closing inventory value at cost (PKR). Allowed range: 0 to 1000000000
* Cost of goods sold in period (PKR). Allowed range: 0 to 1000000000
* Period length (days). Allowed range: 1 to 3660

## How to use

* Enter opening inventory value at cost, closing inventory value at cost, cost of goods sold in period and period length.

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


## Why use this tool

The period basis stays explicit, so a short sales period is not silently presented as an annual result.


## Before relying on the result

Use inventory and COGS on a consistent cost basis. Days are based on this period, not automatically annualised. Zero COGS gives no finite inventory days result.


## Tool limitations

Use inventory and COGS on a consistent cost basis. Days are based on this period, not automatically annualised. Zero COGS gives no finite inventory days result.

## Questions

### What happens when cost of goods sold is zero?

A finite inventory days result is not available from zero sales cost. Review the selected period and underlying figures.

### What should I check before using Inventory Turnover & Days Calculator?

Check Opening inventory value at cost, Closing inventory value at cost, Cost of goods sold in period and Period length. 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.