Enter any decimal number into the Number field and this Round to Nearest Hundredth Calculator returns the value rounded to two decimal places. You can also choose your rounding mode — standard half-up, round up, or round down — to match exactly how you need the result handled.
Rounded to Nearest Hundredth
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Original Number
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Difference (Rounded − Original)
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Third Decimal Digit (Key Digit)
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Rounding to the nearest hundredth means expressing a number with exactly two decimal places. You look at the third decimal digit (the thousandths place): if it is 5 or greater, you round the second decimal digit up; if it is 4 or less, you leave the second decimal digit unchanged.
Look at the third decimal digit of 3.141, which is 1. Because 1 is less than 5, the second decimal digit stays the same. So 3.141 rounded to the nearest hundredth is 3.14.
2.85 already has exactly two decimal places, so it is already at the hundredths precision. Rounded to the nearest hundredth, 2.85 remains 2.85.
The third decimal digit of 18.194 is 4, which is less than 5. So the second decimal digit stays as 9, and 18.194 rounded to the nearest hundredth is 18.19.
The third decimal digit is 6, which is 5 or greater. This means you round the second decimal digit (5) up to 6. So 0.556 rounded to the nearest hundredth is 0.56.
When the digit to be dropped is exactly 5 (e.g. 2.345), 'round half up' increases the kept digit by one (→ 2.35), while 'round half down' leaves it unchanged (→ 2.34). For all other digits the two methods produce the same result. Half-up is the standard method taught in most schools.
Ceiling (round up) always rounds toward positive infinity — any non-zero third decimal digit causes the hundredths digit to increase. Floor (round down) always truncates toward negative infinity — it simply drops all digits after the second decimal place regardless of the value that follows.
The most common real-world use is currency, where values are expressed in dollars and cents (two decimal places). It is also used in science, engineering, and statistics when a precision of one hundredth (0.01) is sufficient for the required accuracy.