Rounding Calculator
Rounding Calculator
Enter a number and how many decimal places to round to — use a positive number for decimal places (like 2 for hundredths), 0 for the nearest whole number, or a negative number to round to the nearest ten, hundred, thousand, and so on.
Positive decimal places round after the decimal point — 2 decimal places takes 1234.567 to 1234.57 — while 0 rounds to the nearest whole number, dropping everything after the decimal point according to standard rounding rules. Negative decimal places extend rounding to the left of the decimal point instead: −2 rounds to the nearest hundred, −3 to the nearest thousand, which is useful for rounding large figures like population counts or budget estimates to a sensible level of precision.
- Positive decimal places round after the decimal point: 2 decimal places rounds to the nearest hundredth (e.g. 1234.567 → 1234.57).
- Zero rounds to the nearest whole number: using 0 decimal places drops everything after the decimal point, rounding up or down based on standard rounding rules.
- Negative decimal places round to the left of the decimal point: −1 rounds to the nearest ten, −2 to the nearest hundred, −3 to the nearest thousand, and so on.
What rounding rule does this use for a value exactly halfway (like 2.5)?
This uses standard "round half up" rounding, so 2.5 rounds to 3 and −2.5 rounds to −2 (rounding toward positive infinity at the halfway point) — the most common convention taught in school.
How do I round to the nearest hundred?
Enter −2 for the decimal places — for example, rounding 1234.567 to −2 decimal places gives 1200, since −2 means "round to the hundreds place."
Rounding Calculator
Enter a number and how many decimal places to round to — use a positive number for decimal places (like 2 for hundredths), 0 for the nearest whole number, or a negative number to round to the nearest ten, hundred, thousand, and so on.
Positive decimal places round after the decimal point — 2 decimal places takes 1234.567 to 1234.57 — while 0 rounds to the nearest whole number, dropping everything after the decimal point according to standard rounding rules. Negative decimal places extend rounding to the left of the decimal point instead: −2 rounds to the nearest hundred, −3 to the nearest thousand, which is useful for rounding large figures like population counts or budget estimates to a sensible level of precision.
- Positive decimal places round after the decimal point: 2 decimal places rounds to the nearest hundredth (e.g. 1234.567 → 1234.57).
- Zero rounds to the nearest whole number: using 0 decimal places drops everything after the decimal point, rounding up or down based on standard rounding rules.
- Negative decimal places round to the left of the decimal point: −1 rounds to the nearest ten, −2 to the nearest hundred, −3 to the nearest thousand, and so on.
What rounding rule does this use for a value exactly halfway (like 2.5)?
This uses standard "round half up" rounding, so 2.5 rounds to 3 and −2.5 rounds to −2 (rounding toward positive infinity at the halfway point) — the most common convention taught in school.
How do I round to the nearest hundred?
Enter −2 for the decimal places — for example, rounding 1234.567 to −2 decimal places gives 1200, since −2 means "round to the hundreds place."