Halfway Between 5 and 21

When you ask "What number is halfway between 5 and 21?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=5 and Y=21.

Halfway Between Line

To find the number halfway between 5 and 21, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 5 and 21 into our formula, we get:

(5 + 21)/2 = 13

Thus, the number halfway between 5 and 21 is 13.

To check that our answer is correct, we subtract 5 from 13 and subtract 13 from 21 and compare the two numbers:

13 - 5 = 8
21 - 13 = 8

As you can see, the halfway number is 8 higher than 5 and 8 lower than 21. Therefore, our halfway between answer of 13 above is correct.

Halfway Between
Find halfway between two other numbers here!

Halfway Between 5 and 22
Here is our next Halfway Between calculation.