HEALTH AND TRAINING

Half marathon speed calculator

Alternative name: Half marathon pace calculator

If you are running a half marathon (21.0975 km / 13.1 miles) then you probably want to know your speed per kilometer. Knowing your speed before the race will make you able to plan your half marathon better. Enter your planned half marathon time below and we will calculate your speed.

Results

Speed in Kilometer per hour: 11.45 km/h
Running pace: 5 minutes, 14 seconds min/km


Our calculations

At Calculatorian, we are keen to share our knowledge, be transparent and open to feedback. Here are the calculations used to create this calculator. If you find an error or deficiency, contact us and we'll fix it in an instant!

Speed in Kilometer per hour was calculated like this:

Step 1

First we need to calculate the variable tis. tis = Time in minutes.

Step 2

Then we need to calculate the variable pace. pace = Pace in minutes per kilometer.

Step 3

Finally we put it together and calculate it like this:

Running pace was calculated like this:

Step 1

First we need to calculate the variable tis. tis = Time in minutes.

Step 2

Finally we put it together and calculate it like this:

Variables used in this formula

hh = Hours
mm = Minutes
ss = Seconds