Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Supplier Lead Time Variability Calculator

Quantify supplier lead time variability and calculate the maximum expected lead time at your chosen confidence level to size safety stock buffers accurately. Use this when onboarding new suppliers or reviewing safety stock policies after missed deliveries.

Average Lead Time (days)

Lead Time Standard Deviation (days)

Confidence Level

Fill in the required fields to see your result.

Supply Chain

Inventory Turnover Analysis Calculator

Computes your inventory turnover ratio and days sales in inventory from annual COGS and average inventory value. Use it to diagnose overstocking, understocking, or cash tied up in slow-moving goods.

Cost of Goods Sold (Annual) ($)

Average Inventory Value ($)

Fill in the required fields to see your result.

Key differences

	Supplier Lead Time Variability Calculator	Inventory Turnover Analysis Calculator
Category	Supply Chain	Supply Chain
Inputs required	3	2
Result	Maximum Expected Lead Time (days)	Inventory Turnover Ratio (times)
What it does	Quantify supplier lead time variability and calculate the maximum expected lead time at your chosen confidence level to size safety stock buffers accurately. Use this when onboarding new suppliers or reviewing safety stock policies after missed deliveries.	Computes your inventory turnover ratio and days sales in inventory from annual COGS and average inventory value. Use it to diagnose overstocking, understocking, or cash tied up in slow-moving goods.