How this calculator works
Choose the smallest integer that is greater than or equal to the input. Ceiling moves toward positive infinity, including for negative inputs. An input that is already an integer stays unchanged.
Formula
ceil(x) = the least integer n satisfying n >= x.
Worked example
ceil(2.3) = 3 and ceil(-2.3) = -2.
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Frequently asked questions
Does this round to the nearest integer?
No. The direction is fixed even when the fractional part is very small.
What happens to an exact integer?
It stays unchanged, including zero and negative integers.
Can I use a measured quantity?
Yes, but the numeric result is in the unit you entered. For complete packages or items, choose the rounding direction that fits your problem.