Roman Numerals to 20

Roman Numerals to 20


Roman Numerals Chart 1 to 10

Before learning the numerals 11 to 20 first watch our lesson on Roman Numerals 1 to 10.

roman numerals 1 to 10 chart

Roman Numerals Chart 11 to 20

Roman Numerals 11 to 20 chart

  • The Roman numerals 11 to 20 are simply ten larger than the Roman numerals 1 to 10.
  • We start with the numeral ‘X’, which is worth 10.
  • We add the numerals for 1-10 after this X.

The Roman numerals 11 to 20 are simply the same as the Roman Numerals 1 to 10 but with an X numeral in front.


17 written in Roman Numerals

  • XVII is made of the numerals X, V and two I‘s.
  • X is worth 10, V is worth 5 and I is worth 1.
  • XVII is the same as 10 + 5 + 1 + 1.
  • XVII is worth seventeen.
  • VII is 5 + 1 + 1, which equals 7.
  • If we know that VII is 7, then we can make 17 by simply writing an X numeral in front.


Roman Numerals to 20 Interactive Question Generator

Roman Numerals to 20: Interactive Questions

Roman Numerals to 20 Worksheets and Answers

Writing Roman Numerals to 20

The Roman numerals to 20 are made up of the following three numerals.

roman numerals I V and X

  • I = 1
  • V = 5
  • X = 10
  • We can add up to three of the same numeral together in a row to make larger numbers.

    For example, two I numerals is two lots of one and makes a total of 2.

    2 is written as II in Roman numerals.

    2 in roman numerals

    We can write III as 3. This is because we have three I numerals. 1 + 1 + 1 = 3.

    3 in roman numerals

    We cannot write 4 as IIII because it uses four I numerals. The most we are allowed to use together is three.

    Instead we write 4 as IV, which is an I before a V, which means 1 before 5.

    4 in roman numerals

    We can count on from 5 to make larger numbers.

    VI means V plus I, which means 5 plus 1.

    VI is 6 in Roman numerals.

    6 in Roman Numerals

    Similarly 7 is written as VII because V + I + I means 5 + 1 + 1.

    8 is VIII because V + I + I + I means 5 + 1 + 1 + 1.

    Again we can’t write 9 as VIIII because it uses four of the same numeral at once. We are only allowed to write three of the same numeral at once.

    Instead, 9 is written as 1 before 10. We write IX because I is 1 and X is 10.

    Here are the Roman numerals to 10. Please visit our lesson on Roman numerals 1 to 10 for our video lesson. When teaching the Roman numerals to 20, we recommend first learning these numerals to 10.

    roman numerals chart of numerals 1 to 10

    11 is ten more than 1, 12 is ten more than 2, 13 is ten more than 3 and so on.

    The numbers 11 to 20 are simply 10 more than the numbers 1 to 10.

    To write the Roman numerals to 20, simply add the numerals for the numbers 1 to 10 to the numeral X.

    X is worth ten and when writing any numerals after this, it will add ten to those numerals.

    Here are the Roman numerals 11 to 20 formed by writing an X numeral in front of the numeral that is 10 less in value.

    Roman Numerals to 20 chart

    For example, 11 is ten more than 1.

    The numeral for 1 is I.

    Therefore to write 11, we write an X and then the numeral for 1.

    11 is written as XI in Roman numerals.

    11 in Roman Numerals

    XI means X + I, which is 10 + 1.

    10 + 1 = 11.

    Similarly, 15 is ten more than 5.

    Therefore to write 15, we write an X and then the numeral for 5.

    The numeral for 5 is V.

    15 is written as XV in Roman numerals.

    15 in Roman Numerals

    XV is X + V, which means 10 + 5.

    It is important to note that we always need to write the larger numerals first when adding Roman numerals.

    We have to write XV in that order because X is worth 10 and V is only worth 5.

    We cannot write V then X as it breaks this rule. We simply write an X and then the smaller value numerals.

    Here we have XVII.

    This means X + V + I + I, which means 10 + 5 + 1 + 1.

    XVII are the Roman numerals for 17.

    17 in Roman numerals

    VII is 7 and so, if we remember how to write 7, then we simply write an X in front to make 17.

    Remember that 4 is written as IV because we can’t use four I numerals.

    IV is one before five, which is four.

    XIV is simply IV with an X numeral before it.

    XIV is X + IV, which means 10 + 4.

    14 in Roman Numerals

    Remember that we only add Roman numerals when they are decreasing in size.

    I is less than V and so we do not add IV to make 6.

    Instead we subtract I from V to make 4. It is easiest to read IV as 1 before 5.

    6 is 1 after five, which is written as VI.

    Here is the final list of the Roman numerals for 11 to 20. We can see the numeral X highlighted in blue, with the numerals following shown in red.

    Roman Numerals to 20 list


Now try our lesson on Rounding Off to the Nearest 10 on a Number Line where we learn how to round numbers to the nearest ten.