Rounding Numbers Calculator. Round: To: Thousands (-3 digits) Hundreds (-2 digits) Tens (-1 digit) Ones(0 digits) Tenths (+1 decimal place) Hundredths (+2 decimal places) Thousandths (+3 decimal places) Other Other round amount (example: -4 equals ten-thousands and 4 equals ten-thousandths): Round Number Rounded Number: 0