Halfway Between 5 and 128

When you ask "What number is halfway between 5 and 128?" 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=128.

Halfway Between Line

To find the number halfway between 5 and 128, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 5 and 128 into our formula, we get:

(5 + 128)/2 = 66.5

Thus, the number halfway between 5 and 128 is 66.5.

To check that our answer is correct, we subtract 5 from 66.5 and subtract 66.5 from 128 and compare the two numbers:

66.5 - 5 = 61.5
128 - 66.5 = 61.5

As you can see, the halfway number is 61.5 higher than 5 and 61.5 lower than 128. Therefore, our halfway between answer of 66.5 above is correct.

Halfway Between
Find halfway between two other numbers here!

Halfway Between 5 and 129
Here is our next Halfway Between calculation.