Round any decimal number to the nearest whole number instantly
| Original Number | Nearest Integer | Explanation |
|---|---|---|
| 3.2 | 3 | 0.2 < 0.5, round down |
| 3.7 | 4 | 0.7 > 0.5, round up |
| -2.6 | -3 | Negative: rounds to -3 |
| 7.5 | 8 | Exactly 0.5, round up |
| -1.3 | -1 | Negative: rounds to -1 |
| 99.9 | 100 | 0.9 > 0.5, round up to 100 |
An integer is a whole number without any decimal or fractional part. Integers include positive numbers (1, 2, 3, ...), negative numbers (-1, -2, -3, ...), and zero (0). When you round to the nearest integer, you're converting a decimal number to the closest whole number.
Examine the fractional part (everything after the decimal point). For example, in 3.7, the decimal part is 0.7.
If the decimal part is 0.5 or greater, round UP. If it's less than 0.5, round DOWN.
The result is a whole number with no decimal places. For 3.7, the result is 4.
You can't have 3.7 people. If an average is 3.7 people per household, you'd round to 4 people.
Example: 3.7 people → 4 people
Physical items must be whole numbers. You can't order 12.4 chairs.
Example: 12.4 chairs → 12 or 13 chairs
Ages are typically expressed as whole numbers. Someone 25.8 years old is "25 years old."
Example: 25.8 years → 26 years
Game scores and test scores often use whole numbers only.
Example: 87.6 points → 88 points
Each vote is counted as a whole number. You can't cast 0.5 votes.
Example: Weighted average 145.3 votes → 145 votes
When converting to days, you often round to whole days.
Example: 7.8 days → 8 days
The most common method. Decimal part ≥ 0.5 rounds up, < 0.5 rounds down.
Examples: 2.4 → 2, 2.5 → 3, 2.6 → 3
Always round to the next higher integer, even if closer to the lower one.
Examples: 2.1 → 3, 2.9 → 3, -2.5 → -2
Always round to the next lower integer, even if closer to the higher one.
Examples: 2.1 → 2, 2.9 → 2, -2.5 → -3