4 Basic Flowchart Symbols

Whether you're trying to read a flowchart or creating a flowchart, knowing the most common symbols and flowchart conventions is going to make it a lot easier. Here, we've got the four flowcharting symbols you've got to know, plus a rundown on some more intermediate process symbols if you're looking for extra credit.

1. The Oval

An End or a Beginning


The oval, or terminator, is used to represent the start and end of a process. Use the Gliffy flowchart tool to drag and drop one of these bad boys and you've got yourself the beginning of a flowchart. Remember to use the same symbol again to show that your flowchart is complete.

2. The Rectangle

A Step in the Flowcharting Process


The rectangle is your go-to symbol once you've started flowcharting. It represents any step in the process you’re diagramming and is the workhorse of the flowchart diagram. Use rectangles to capture process steps like basic tasks or actions in your process.

3. The Arrow

Indicate Directional Flow


The arrow is used to guide the viewer along their flowcharting path. And while there are many different types of arrow tips to choose from, we recommend sticking with one or two for your entire flowchart. This keeps your diagram looking clean, but also allows you to emphasize certain steps in your process.

4. The Diamond

Indicate a Decision


The diamond symbolizes that a decision is required to move forward. This could be a binary, this-or-that choice or a more complex decision with multiple choices. Make sure that you capture each possible choice within your diagram.

With those four basic symbols, you likely have everything you need to get started on your own flowchart! Give it a try with Gliffy or read on for more info on intermediate flowcharting symbols.


Intermediate & Advanced Flowchart Symbols

As you know, flowcharts are made up of a sequence of actions, data, services, and/or materials. They illustrate where data is being input and output, where information is being stored, what decisions need to be made, and which people need to be involved. In addition the basic flowchart conventions, rules, and symbols, these intermediate flowchart symbols will help you describe your process with even more detail.

Document Symbols

Single and multiple document symbolsSingle and multiple document icons show that there are additional points of reference involved in your flowchart. You might use these to indicate items like “create an invoice” or “review testing paperwork.”

Data Symbols

Five symbols representing data storageData symbols clarify where the data your flowchart references is being stored. (You probably won’t use the paper tape symbol, but it definitely came in handy back in the day.)

Input & Output Symbols

Four symbols representing input and output typesInput and output symbols show where and how data is coming in and out throughout your process.

Merging & Connecting Symbols

Three symbols for merging and connectingAgreed-upon merging and connector symbols make it easier to connect flowcharts that span multiple pages.

Additional Useful Shapes

Predefined process, loop limit, and delay symbolsThe above are a few additional symbols that prove your flowcharting prowess when put to good use.

Using Flowchart Symbols

You’ve got the building blocks to make an awesome flowchart, so get started! 

Try online Try in Confluence

P.S. We threw together a little cheat sheet-slash-key you can use to keep drawing. If you’re feeling like you could still use a little help, you can find all Gliffy’s information about creating a flowchart by visiting our dedicated flowchart examples page.

Key of the most common flowchart symbols