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Mayan Numerals

Tool to convert to/from Mayan numbers system. The Maya numeral system uses a mix of base 20 (vigesimal) and base 5 (and also 360 numerals)

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Mayan Numerals -

Tag(s) : Numeral System, History, Symbol Substitution

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Mayan Numerals

Mayan to Decimal/Arabic Numbers Converter



Decimal/Arabic to Mayan Numbers Converter





Answers to Questions (FAQ)

What are Maya numerals? (Definition)

In the Maya culture, numbers consist of simple glyphs/symbols: the dots . and the - (horizontal) lines.

The mathematical peculiarity of Maya numeration is the writing of numbers in base 20 (called vicesimal or vigesimal base).

In the Maya civilization, the writing of numbers is generally vertical (the units are placed under the tens/twenties, under the (four-)hundreds etc.)

How to write Maya numbers?

In Mayan culture, numbers are written in base 20 (called vigesimal base). The 20 Mayan digits are composed of simple glyphs/symbols that can be added: dots . associated to value $ 1 $ (units) and horizontal bars - associated to value $ 5 $. The mayan civilization used a vertical writing for the numbers (units under tens/twenties, under (four-)hundreds, etc.).

Example: The number $ 14 $ (English/hindu-arabic numeral in base 10) is written char(69) in Mayan (2 bars and 4 dots: $ 2 \times 5 + 4 \times 1 = 14 $)

Example: $ 26 $ is written (in 2 rows: 1 dot on the first line: $ 1 \times 20 = 20 $ and 1 dot and 1 bar on the second line $ 1 + 5 = 6 $, total $ 20 + 6 = 26 $)
char(49)
char(54)

Example: $ 0 $ (zero) is noted char(48) (originally a shell shape, but some say an egg or an American football/rugby ball)

The Mayas seemed to use a specific rule, a modified Vigesimal system, for the third floor when they wrote dates and sometimes for large numbers. Indeed, for dates, the third place stops at $ 360 $ (base 10). This change on the third floor refers to the following numbers.

Example: In base 20 $ 360 $ is normally written char(73)char(48), but in modified base 20, $ 360 $ is written char(49)char(48)char(48) (which equals $ 400 $ in unmodified base 20). In the same way, the number $ 7200 $ is written $ 8000 $.

How to convert Mayan numbers?

Converting Mayan numerals to English/Arabic numerals is made by counting dots and bars symbols on each rows and treat it as base 20 writing, before converting it to base 10.

Example: a single row with 2 dots and 3 bars: $ 2 \times 1 + 3 \times 5 = 17 $

Example: A number on two rows with 1 dot then (under) 2 dots: $ 1 \times 20 + 2 \times 1 = 22 $

For numbers that are greater than or equal to 360, be sure to apply the modified vigesimal system if necessary.

How to write a date with Mayan numbers?

The dates in Maya are based on the kin (plural kinob), which is 1 day, then the uinal (plural unialob) which is 20 days, the tun, an 18 uinalob period which is therefore 360 days, about 1 year (365.24 days), then the katun (20 tunob = 7200 days = about 20 years), then the baktun (20 katunob, 144000 days = about 394 years). Day 0 seems to match August 11, 3114 BC of our era (precision to be relativised with the Gregorian / Julian calendar chosen)

To write a birthdate or anniversary date in a contemporary way, dCode recommends to use the values of the 3 numbers (day, month, year) written in Maya and separated by a dash - or a bar / (slash)

How to count using Mayan numerals?

The first Mayan numbers are:

0(zero)char(48)1char(49)2char(50)3char(51)4char(52)
5char(53)6char(54)7char(55)8char(56)9char(57)
10char(65)11char(66)12char(67)13char(68)14char(69)
15char(70)16char(71)17char(72)18char(73)19char(74)
20char(49)
char(48)
21char(49)
char(49)
22char(49)
char(50)
23char(49)
char(51)
24char(49)
char(52)
40char(50)
char(48)
60char(51)
char(48)
80char(52)
char(48)
100char(53)
char(48)

For others maya numbers (up to 1000, 10000, 100000, 1000000 etc.), use the form above.

Why does maya notation change after 19 (from 20)?

Today, for counting, base 10 is used, up to 9, the 10 digits 0,1,2,3,4,5,6,7,8,9 use only one character/symbol /glyph, beyond 9, it is necessary to use 2 symbols/numbers to write 10 (a 1 and a 0). Similarly, the Mayan numeral uses base 20 to count, so beyond 19 it is necessary to use 2 symbols/glyphs.

Why does maya notation use base 20?

It is assumed that men today count in base 10 because they have 10 fingers on their hands. It is likely that the Maya considered a process including the toes, or 20 fingers.

Why is 20 not written with 4 bars?

It's mostly unusual and confusing so avoid it. It's a bit like asking the question why not write 10 with a new symbol, like , some may understand, some may not.

How to recognize Mayan numbers?

Maya numeration uses generally stacked lines and dots.

The Mayan civilization lived in Central America around -2000 BC as their pyramids testify.

Although there are similarities, the Mayan civilization is different from the Aztecs or the Incas.

Any reference to Mexico, Belize, Guatemala, El Salvador or Honduras (current areas where the Mayans lived) are clues.

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