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Mayan Numeral Converter

Convert numbers into base twenty Mayan numerals and read the place digits back into decimal.

Convert Mayan numerals

Numeral: —
Place digits: —
Read back: —
A dot is one, a bar is five and the shell marks a zero place. Places are powers of twenty, read from the top down.

How to use the Mayan Numeral Converter

  1. Type a decimal number to see its Mayan numeral and place digits.
  2. Read the breakdown table to see the bars, dots and shell in every place.
  3. Type place digits from the top down to convert a numeral back to decimal.

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Frequently Asked Questions

Common questions about the free online mayan numeral converter.

Type the decimal number and the Mayan numeral appears at once, together with the digit in every place of the base twenty system.
It is a base twenty system read from the top place down. Each place is twenty times the value of the place below it.
A dot stands for one, a bar stands for five and a shell stands for zero. The digit nineteen is three bars and four dots.
The Maya used a shell as a placeholder so that an empty place could be told apart from a missing one, one of the earliest uses of zero.
Type the place digits from the top down, separated by commas, and the tool multiplies each place by its power of twenty.
Six places are allowed, so the tool handles whole numbers from zero up to nearly sixty four million.
No. The conversion runs entirely in your browser and nothing you type is ever uploaded.
Yes. It is completely free, needs no account and can be used as often as you like.

Last updated: October 10, 2026