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Common Shares Outstanding Calculator for Calculating Weighted Average

Calculator Preferences
Stock Shares Outstanding Calculator Sign
Stock Shares Outstanding Calculator

This investment calculator will calculate the weighted average number of common shares outstanding for any number of different stock transaction dates. Calculations are based on durations in number of days instead of number of months. The Learn tab includes brief answers to:

  • What is weighted average?
  • How do you calculate weighted average shares outstanding?
Learn More

Selected Data Record:

A Data Record is a set of calculator entries that are stored in your web browser's Local Storage. If a Data Record is currently selected in the "Data" tab, this line will list the name you gave to that data record. If no data record is selected, or you have no entries stored for this calculator, the line will display "None".

DataData recordData recordSelected data record: None
Begin shrs:Begin shares:Beginning shares outstanding:Beginning shares outstanding:

Beginning shares outstanding:

Enter the number of beginning shares outstanding and then select the beginning date in the row directly below this one.

Beginning date:Beginning date:Beginning date:Beginning date:

Beginning date:

Select the beginning month, day, and year. Note that this date selection will need to come before all other dates selected in the remainder of the calculator.

Ending date:Ending date:Ending date:Ending date:

End date:

In the row directly below this line, select the ending date of the period you are calculating outstanding shares for. Note that all selected dates must be earlier than this date.

Interim Stock Transactions

Interim Stock Transactions:

Use this section to enter the stock transactions that occurred between the beginning and ending dates selected above. Note that the calculator will attempt to sort the transactions in chronological order (from earliest to latest), but it would be best if you entered them in that order.

To add a transaction, select the date of the transaction (must be unique from all other transaction dates), select Increase or Decrease, and enter the number of shares transacted. When you're satisfied with the selections and entries, tap the Add ... button.

To edit a transaction, click its numbered Edit button to load the transaction into the form. When you're done making changes, tap the Save ... button.

To delete a transaction, click its numbered Edit button to load the transaction into the form. Then click the Del... button.

Important! In order to save your entries for your next visit, you will need to create (or save an existing) data record under the Data tab before closing or leaving this page.

Transaction date:Transaction date:Transaction date:Transaction date:

Transaction date:

Select the the date of the transaction. Note that the date must fall within the selected beginning and ending dates, and it must be different from any and all other transaction dates. If two or more stock transactions occurred on the same date, please combine them into a single entry.

Effect:Effect:Increase or decrease:Increase or decrease:

Increase or decrease:

Select whether the transaction resulted in an increase or a decrease in the total common shares outstanding.

Trans shrs:Trans shares:Transaction shares:Transaction shares:

Transaction shares:

Enter the number of shares associated to the transaction.

Total days:Total days:Total number of days:Total number of days:

Total number of days:

This is the calculated number of days from the beginning date to the ending date.

End shares:Ending shares:Ending shares outstanding:Total ending shares outstanding:

Total ending shares outstanding:

This is the number of shares outstanding after the beginning and all entered stock transactions have been accounted for.

Avg shares:Avg shares:Weighted average shares:Weighted average number of outstanding shares:

Weighted average number of outstanding shares:

This is the weighted average of the shares outstanding from the beginning date to the ending date.

If you would like to save the current entries to the secure database, tap or click on the Data tab, select "New Data Record", give the data record a name, then tap or click the Save button. To save changes to previously saved entries, simply tap the Save button. Please select and "Clear" any data records you no longer need.

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Help and Tools

Help and Tools:

This section, which you can Unstick or Hide in the Calculator Preferences (just above the top of the calculator), contains the following tabs (content too long to fit within bordered frame can be scrolled up and down):

About: Click this tab for an introduction to the calculator.

Instructions: Click this tab for step-by-step instructions for using the calculator.

Terms: Click this tab for a list of the descriptions that are located within each popup help button (info icons).

PCalc: Click this tab for a handy "pocket" calculator you can use when you need to calculate an entry needed for the calculator.

Data: Click this tab to save a set of entries or a note in between visits. Entries and notes will be stored to your web browser's local storage (if supported by your browser of choice), meaning they can only be recalled with the same device and web browser you were using when you saved them. If you'd like to save entries and notes between devices you can do so by subscribing to the Ad-Free Member Version.



Add or remove this page to/from my favorites.

Adjust Calculator Width:

Move the slider to left and right to adjust the calculator width. Note that the Help and Tools panel will be hidden when the calculator is too wide to fit both on the screen. Moving the slider to the left will bring the instructions and tools panel back into view.

Also note that some calculators will reformat to accommodate the screen size as you make the calculator wider or narrower. If the calculator is narrow, columns of entry rows will be converted to a vertical entry form, whereas a wider calculator will display columns of entry rows, and the entry fields will be smaller in size ... since they will not need to be "thumb friendly".

Show/Hide Popup Keypads:

Select Show or Hide to show or hide the popup keypad icons located next to numeric entry fields. These are generally only needed for mobile devices that don't have decimal points in their numeric keypads. So if you are on a desktop, you may find the calculator to be more user-friendly and less cluttered without them.

Stick/Unstick Tools:

Select Stick or Unstick to stick or unstick the help and tools panel. Selecting "Stick" will keep the panel in view while scrolling the calculator vertically. If you find that annoying, select "Unstick" to keep the panel in a stationary position.

If the tools panel becomes "Unstuck" on its own, try clicking "Unstick" and then "Stick" to re-stick the panel.