Quickly round decimals to one tenth with friendly explanations and steps today. Batch process lists, pick rounding rules, then download clean CSV or PDF.
| Input | Rounded to nearest tenth (half-up) | Why |
|---|---|---|
| 12.34 | 12.3 | Hundredths digit is 4, so the tenths stays. |
| 12.35 | 12.4 | Hundredths digit is 5, so the tenths increases. |
| -0.05 | -0.1 | Half-up moves away from zero at the tie. |
| 99.995 | 100.0 | Carry happens when the tenth place rounds up. |
Try the other rounding rules to see how ties like X.X5 behave.
To round a value x to the nearest tenth, shift the decimal one place:
This calculator also offers tie-handling options (half-up, half-down, half-even) plus floor and ceiling at the tenth place.
Rounding simplifies numbers so decisions are faster and communication is clearer. In budgets, measurements, and classroom work, the nearest tenth is a common compromise: it keeps one decimal of detail while removing distracting digits that rarely change the conclusion.
The tenths digit is the first digit after the decimal point. When you round to the nearest tenth, you keep that digit and look one place to the right (the hundredths digit). This place-value check controls whether the tenths digit stays the same or increases by one.
A reliable way to round is to shift, round, then shift back. Multiply the value by 10 to move the tenths place into the ones position. Round to an integer using a chosen rule, then divide by 10. This mirrors the formula section and produces consistent results for both small and large magnitudes.
The tricky moments happen when the shifted value ends with exactly 0.5. Different fields choose different tie rules. Half-up matches many school examples. Half-even reduces systematic bias in long datasets. Half-down moves ties toward zero. Selecting the rule makes your rounding behavior explicit and auditable.
Negative numbers can surprise users because “up” and “down” depend on the sign. For ties, half-up moves away from zero, so -0.05 becomes -0.1. Floor and ceiling work at the tenths place too: floor moves toward negative infinity, while ceiling moves toward positive infinity.
Rounding is not only cosmetic; it changes what you report as meaningful precision. If your instrument is accurate to about 0.1 units, reporting to the nearest tenth is appropriate. If uncertainty is larger, extra decimals can mislead. This calculator helps you match the displayed precision to the quality of your data.
When working with lists, consistent rounding prevents small formatting differences from becoming analysis errors. Batch mode accepts values separated by commas, spaces, or line breaks. Invalid entries are flagged, so you can clean input quickly. Exporting CSV supports spreadsheets and reporting, while PDF suits sharing and recordkeeping.
Always check boundary examples such as 1.24, 1.25, 1.26, and values near carry points like 9.95 or 99.995. Keep in mind that some decimals are not represented exactly in binary, so stable workflows document the rounding rule and apply it consistently. Small discipline here prevents large downstream confusion.
It means keeping one digit after the decimal point. You look at the hundredths digit to decide whether the tenths digit stays the same or increases by one.
Because the hundredths digit is 5, which is treated as a tie. In half-up rounding, ties increase the tenths digit, so 12.35 becomes 12.4.
Half-even (bankers rounding) sends ties to the nearest even digit after shifting. It is common in finance and statistics because it reduces long-run rounding bias.
The calculator applies the selected rule consistently with sign. In half-up, ties move away from zero, so -0.05 rounds to -0.1 at the tenth place.
Floor moves the value down toward negative infinity at the tenths place, while ceiling moves it up toward positive infinity. They do not use “tie” logic; they are directional.
Yes. Choose Batch list, paste numbers separated by commas, spaces, or new lines, and calculate. You can then export the full results to CSV or PDF.
Different tools use different tie rules or display formatting. Selecting the rounding rule here makes the behavior explicit, and the steps show exactly how the tenths result is produced.
Accurate rounding builds confidence in calculations every single day.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.