Round to the Nearest Tenth Calculator
Enter any number and round it to the nearest tenth — or switch to whole numbers, hundredths, thousandths, or ten-thousandths. The calculator shows the digit it examined and the rule it applied.
Example: with Number to round 7.482 · Round to the nearest Tenth (0.1) → Rounded value: 7.5.
Computed by the calculator below using its default values. Change any input to see your own numbers.
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Check it outHow to round to the nearest tenth
The tenths place is the first digit after the decimal point. To round to the nearest tenth, look one digit further — the hundredths digit. If it’s 4 or less, keep the tenths digit; if it’s 5 or more, bump the tenths digit up by one. So 7.482 → 7.5 (hundredths digit 8 rounds up), 3.44 → 3.4 (the 4 rounds down), and 2.35 → 2.4 (a 5 rounds up). When the tenths digit is 9, the round carries: 6.97 → 7.0 — and writing 7.0 rather than 7 signals the answer is good to one decimal place.
Watch the wording: the nearest tenth (0.1) is not the nearest ten (10). 246.3 to the nearest tenth is 246.3 already; to the nearest ten it’s 250. This calculator also rounds to whole numbers, hundredths, thousandths, and ten-thousandths — the rule is identical, just applied one place further along.
How it’s calculated
To round to the nearest tenth, the calculator examines the hundredths digit of the number as typed: 0–4 rounds down (the tenths digit stays), 5–9 rounds up (the tenths digit increases by one, carrying if it is 9). The same rule shifts one place for whole numbers, hundredths, thousandths, and ten-thousandths. Ties (an examined digit of exactly 5) round up, i.e. away from zero, so −7.45 becomes −7.5. Reading the typed digits avoids binary floating-point surprises on tie values.
Results update as you type and are estimates, not professional advice — verify important decisions with a qualified professional.
Common mistakes
- Cascading through the digits: 7.449 → 7.45 → 7.5 is wrong. Only the hundredths digit (4) matters, so 7.449 → 7.4.
- Confusing the nearest tenth (0.1) with the nearest ten (10) — 246 is 246.0 to the tenth but 250 to the ten.
- Dropping the trailing zero: 6.97 rounds to 7.0, and that .0 is what tells a reader the value is precise to tenths.
Frequently asked questions
How do I round to the nearest tenth?
Keep one decimal place. Check the hundredths digit: 5 or more rounds the tenths digit up, 4 or less leaves it alone. 12.36 → 12.4; 12.34 → 12.3.
What is 3.45 rounded to the nearest tenth?
3.5. The hundredths digit is exactly 5, and the standard school rule rounds fives up. (Some spreadsheets show 3.4 because they store 3.45 as a hair less in binary.)
What does 6.97 round to?
7.0. The hundredths digit 7 rounds the tenths digit 9 up, which carries into the ones place. Keep the .0 to show tenths precision.
Is the nearest tenth the same as one decimal place?
Yes — rounding to the nearest tenth, to 0.1, and to one decimal place all mean the same thing.
How do I round to the nearest ten thousandth?
Keep four decimal places and check the fifth: 3.14159 → 3.1416. Choose “Ten-thousandth” in the calculator to see the steps.