Roman Numerals

Roman Numerals: CCCXI = 311

Convert Roman Numerals

Arabic numerals:
Roman numerals:
 Arabicnumerals 0 1 M C X I 2 MM CC XX II 3 MMM CCC XXX III 4 CD XL IV 5 D L V 6 DC LX VI 7 DCC LXX VII 8 DCCC LXXX VIII 9 CM XC IX

The converter lets you go from arabic to roman numerals and vice versa. Simply type in the number you would like to convert in the field you would like to convert from, and the number in the other format will appear in the other field. Due to the limitations of the roman number system you can only convert numbers from 1 to 3999.

To easily convert between roman and arabic numerals you can use the table above. The key is to handle one arabic digit at a time, and translate it to the right roman number, where zeroes become empty. Go ahead and use the converter and observe how the table shows the solution in realtime!

Current date and time in Roman Numerals

 2024-09-11 18:44:35 MMXXIV-IX-XI XVIII:XLIV:XXXV

Here is the current date and time written in roman numerals. Since the roman number system doesn't have a zero, the hour, minute, and second component of the timestamps sometimes become empty.

The year 311

Here you can read more about what happened in the year 311.

The number 311

The number 311 is a prime number.

311 as a binary number: 100110111
311 as an octal number: 467
311 as a hexadecimal number: 137

Numbers close to CCCXI

Below are the numbers CCCVIII through CCCXIV, which are close to CCCXI. The right column shows how each roman numeral adds up to the total.

 308 = CCCVIII = 100 + 100 + 100 + 5 + 1 + 1 + 1 309 = CCCIX = 100 + 100 + 100 + 10 − 1 310 = CCCX = 100 + 100 + 100 + 10 311 = CCCXI = 100 + 100 + 100 + 10 + 1 312 = CCCXII = 100 + 100 + 100 + 10 + 1 + 1 313 = CCCXIII = 100 + 100 + 100 + 10 + 1 + 1 + 1 314 = CCCXIV = 100 + 100 + 100 + 10 + 5 − 1