The running pace calculator on this website provides 3 different types of results: your calculated running pace, a running pace chart and your calculated running speed.
Your running pace is how long it takes you to run a completed cycle, typically a single mile or 1 kilometer. Therefore, when your run at a pace, you can say that you are running a specific time per distance. For example, an eight minute mile or 5 minutes per kilometer.
Running speed is a different calculation. It is usually defined at the distance traveled per hour. For example, 10 miles per hour or 6 kilometers per hour.
The difference between your pace and your calculated speed is vastly different. For example, if you run an 6 minute mile pace, it would take you 1 hour to run 10 miles. If you run at 6 miles per hour, your pace would be 10 minutes per mile.
As you can see, running speed and running pace are very different numbers. However, both numbers will provide insight into how fast your are running. They can both provide key points of data to improve your training and your fitness level.