Mayan Numeral Calculator

Convert between modern decimal numbers and ancient Mayan vigesimal numerals

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Numeral Converter

Decimal → Mayan
Mayan → Decimal
Calendar Converter
Mayan Vigesimal Value
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Mayan Numeral Representation
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How to Enter Mayan Numerals

Use the interactive builder below to create Mayan numerals place by place:

  1. Select the place value (20⁰, 20¹, 20², etc.) for a row. Ensure each row has a unique place value.
  2. Use the "+ Dot (1)" and "+ Bar (5)" buttons to set the value (0-19) for that place.
  3. Use "+ Add Place Value" to add more rows (up to 4).
  4. Click "Convert to Decimal" to see the result.
Value: 0
Decimal Value
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Mayan Calendar System

The Maya used multiple calendar systems, including:

  • Tzolkin: 260-day sacred calendar (13 numbers × 20 day names)
  • Haab: 365-day solar calendar (18 months of 20 days + 5 extra days)
  • Long Count: Linear count of days since the mythological creation date (Aug 11, 3114 BCE)

Convert between Gregorian dates and Mayan calendar dates below. Uses the GMT correlation (584283).

Mayan Calendar Date
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About Mayan Numerals

The Maya civilization developed a vigesimal (base-20) number system using only three symbols:

  • A dot () represents 1
  • A bar () represents 5
  • A shell symbol () represents 0

Numbers 1-19 are formed by combining dots (max 4) and bars (max 3). Numbers are written vertically, with place values increasing upwards (200 at the bottom, 201 above it, etc.).

Examples

Number 12 (in 200 place)
2 bars (5+5 = 10) + 2 dots (1+1 = 2)

= 12
Number 25 (1.5 in vigesimal)
Place 201: 1 dot (1 x 20 = 20) Place 200: 1 bar (5 x 1 = 5)
201
200
= 25