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Ceiling Function Calculator
Ceiling and floor of a number, plus rounding and truncation, for decimals and negatives.
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Ceiling
Compare Your Options And Get Clear Answers
Ceiling and floor of a number, plus rounding and truncation, for decimals and negatives.
Ceiling Function Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: ceil(x) = smallest integer >= x.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Ceiling Quick Guide
Typical values for reference.
| x | Ceiling | Floor | Round |
|---|---|---|---|
| 3.2 | 4 | 3 | 3 |
| -2.3 | -2 | -3 | -2 |
| 5 | 5 | 5 | 5 |
| 0.5 | 1 | 0 | 1 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Ceiling Function Calculator FAQ
Answers to common questions about this calculator.
It rounds a number up to the next integer.
ceil(-2.3) = -2, floor(-2.3) = -3.
ceil(x) = smallest integer >= x.
It is an estimate based on the inputs you enter. Check real quotes, labels or official guidance for important decisions.