you do not need to round for that you can just incorporate in formula, normal rounding rules are not difficult to calculate upper and lower limit without rounding formula.
Lets assume that the value you look for is in cel A3
then the formula is
if in A3 you put wholenumeber 3
Than any value between 2,5 and 3,499999.... will count for the countif formula above
You can make it more flexible by have 2 input cells for upper and lower limit. Then you can control exact range of numbers to find
If you need something different then please upload en excel example file it is then a lot easier to see what you mean and to build working formula.
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