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Westport Innovations Inc (NAS:WPRT)
Days Inventory
211.58 (As of Sep. 2014)

Westport Innovations Inc's average inventory for the three months ended in Sep. 2014 was $40.2 Mil. Westport Innovations Inc's cost of goods sold for the three months ended in Sep. 2014 was $17.3 Mil. Hence, Westport Innovations Inc's days inventory for the three months ended in Sep. 2014 was 211.58.

Westport Innovations Inc's days inventory increased from Sep. 2013 (158.95) to Sep. 2014 (211.58). It might indicate that Westport Innovations Inc's sales slowed down.

Warning Sign:

If a company builds up inventory, it may mean it is having difficulties selling its goods.

Inventory can be measured by Days Sales of Inventory (DSI). Westport Innovations Inc's days sales of inventory (DSI) for the three months ended in Sep. 2014 was 144.94.

Inventory turnover measures how fast the company turns over its inventory within a year. Westport Innovations Inc's inventory turnover for the three months ended in Sep. 2014 was 0.43.

Inventory to revenue ratio determines the ability of a company to manage their inventory levels. It measures the percentage of Inventories the company currently has on hand to support the current amount of Revenue. Westport Innovations Inc's inventory to revenue ratio for the three months ended in Sep. 2014 was 1.59.


Definition

Days Inventory indicates the number of days of goods in sales that a company has in the inventory.

Westport Innovations Inc's Days Inventory for the fiscal year that ended in Dec. 2013 is calculated as

Days Inventory (A: Dec. 2013 )
=Average Inventory / COGS*Days in Period
=( (Inventory (A: Dec. 2012 ) + Inventory (A: Dec. 2013 )) / 2 ) / COGS (A: Dec. 2013 )*Days in Period
=( (44.946 + 40.626) / 2 ) / 148.69*365
=42.786 / 148.69*365
=105.03

Westport Innovations Inc's Days Inventory for the quarter that ended in Sep. 2014 is calculated as:

Days Inventory (Q: Sep. 2014 )
=Average Inventory / COGS*Days in Period
=( (Inventory (Q: Jun. 2014 ) + Inventory (Q: Sep. 2014 )) / 2 ) / COGS (Q: Sep. 2014 )*Days in Period
=( (38.055 + 42.32) / 2 ) / 17.332*365 / 4
=40.1875 / 17.332*365 / 4
=211.58

* All numbers are in millions except for per share data and ratio. All numbers are in their own currency.


Explanation

An increase of Days Inventory may indicate the company's sales slowed.

1. Inventory can be measured by Days Sales of Inventory (DSI).

Westport Innovations Inc's Days Sales of Inventory for the three months ended in Sep. 2014 is calculated as

Days Sales of Inventory (DSI)=Average Inventory/Revenue*Days in Period
=40.1875/25.301*365 / 4
=144.94

2. Inventory Turnover measures how fast the company turns over its inventory within a year.

Westport Innovations Inc's Inventory Turnover for the three months ended in Sep. 2014 is calculated as

3. Inventory to Revenue determines the ability of a company to manage their inventory levels. It measures the percentage of Inventories the company currently has on hand to support the current amount of Revenue.

Westport Innovations Inc's Inventory to Revenue for the three months ended in Sep. 2014 is calculated as

Inventory to Revenue=Average Inventory / Revenue
=40.1875 / 25.301
=1.59

* All numbers are in millions except for per share data and ratio. All numbers are in their own currency.


Be Aware

A lot of business are seasonable. It makes more sense to compare Days Inventory from the same period in the previous year instead of from the previous quarter.


Related Terms

Cost of Goods Sold, Inventory, Revenue, Inventory Turnover, Inventory to Revenue


Historical Data

* All numbers are in millions except for per share data and ratio. All numbers are in their own currency.

Westport Innovations Inc Annual Data

Mar04Mar05Mar06Mar07Mar08Mar09Mar10Mar11Dec12Dec13
DaysInventory 0.0011.3814.5417.4042.9350.2239.7549.79109.96105.03

Westport Innovations Inc Quarterly Data

Jun12Sep12Dec12Mar13Jun13Sep13Dec13Mar14Jun14Sep14
DaysInventory 61.9278.540.00193.53174.39158.9561.11119.65129.76211.58
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