Round to the Nearest Tenth – Online Calculator and Rules

Enter a number:

Result of rounding the number to the nearest tenth:

≈0.00

Round to the Nearest Ten

What Does It Mean to Round to the Nearest Tenth?

Rounding a number to the nearest tenth means simplifying the number by writing it with fewer significant digits while keeping its value close to what it originally was.

The rounded number is less precise (introducing some error), but easier to use in practice.

Most often, rounding a number to the nearest tenth refers to mathematical rounding to the nearest tenth.

Mathematical rounding to the nearest tenth means rounding the number to one decimal place, where the difference between the original number and the rounded number is minimized.

Rounding Rules to the Nearest Tenth:

  • The first digit after the decimal point (the tenth part of the number) remains unchanged if the second digit after the decimal point is less than 5. (0; 1; 2; 3; 4)
  • The first digit after the decimal point increases by 1 if the second digit after the decimal point is 5 or greater. (5; 6; 7; 8; 9)

Examples:

  • 1.21 rounds to 1.2 because the second digit after the decimal point (1) is less than 5
  • 1.22 rounds to 1.2 because the second digit after the decimal point (2) is less than 5
  • 1.23 rounds to 1.2 because the second digit after the decimal point (3) is less than 5
  • 1.24 rounds to 1.2 because the second digit after the decimal point (4) is less than 5
  • 1.25 rounds to 1.3 because the second digit after the decimal point (5) is equal to 5
  • 1.26 rounds to 1.3 because the second digit after the decimal point (6) is greater than 5
  • 1.27 rounds to 1.3 because the second digit after the decimal point (7) is greater than 5
  • 1.28 rounds to 1.3 because the second digit after the decimal point (8) is greater than 5
  • 1.29 rounds to 1.3 because the second digit after the decimal point (9) is greater than 5
  • 3.14 rounds to 3.1 because the second digit after the decimal point (4) is less than 5
  • 1.549 rounds to 1.5 because the second digit after the decimal point (4) is less than 5
  • 1.55001 rounds to 1.6 because the second digit after the decimal point (5) is equal to 5