Halfway Between 1 and 20

When you ask "What number is halfway between 1 and 20?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=1 and Y=20.

Halfway Between Line

To find the number halfway between 1 and 20, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 1 and 20 into our formula, we get:

(1 + 20)/2 = 10.5

Thus, the number halfway between 1 and 20 is 10.5.

To check that our answer is correct, we subtract 1 from 10.5 and subtract 10.5 from 20 and compare the two numbers:

10.5 - 1 = 9.5
20 - 10.5 = 9.5

As you can see, the halfway number is 9.5 higher than 1 and 9.5 lower than 20. Therefore, our halfway between answer of 10.5 above is correct.

Halfway Between
Find halfway between two other numbers here!

Halfway Between 1 and 21
Here is our next Halfway Between calculation.