🥚 Antimundo's dozenal arithmetic website

This is a website made by Antimundo to learn about dozenal arithmetic.

This website is libre software, licensed under the GPLv3 license. See the source code on Codeberg.

What is dozenal?

Most humans count on decimal base with ten digits.

Dozenal base uses a dozen of digits.

Why use dozenal?

Dozenal uses a base that has more factors than decimal, which makes it easier to make arithmetic operations, like addition, substraction, multiplicaton, and division.

Base decimal uses the number 10_decimal which has 4 factors_decimal: 1, 2, 5, 10.

Base dozenal uses the number 12_decimal which has 6 factors_decimal: 1, 2, 3, 4, 6, 12.

There are many common things that already use dozenal:

• 🥚 Eggs, 🍰 pastries, 🍩 doughnuts, 🍪 cookies, 🥤soda cans, 🥄 cutlery, 🍽️ crockery, and many other items are sold in dozens.
  _{1🥚, 2🥚, 3🥚, 4🥚, 5🥚, 6🥚, 7🥚, 8🥚, 9🥚, X🥚, E🥚, 10🥚}
• ⏰ Clocks have 10_dozenal hours.
  _{1, 2, 3, 4, 5, 6, 7, 8, 9, E, X, 10}
• 📅 Calendars have 10_dozenal months.
  _{1. january, 2. february, 3. march, 4. april, 5. may, 6. june, 7. july, 8. august, 9. september, E. october, X. november, 10. december}
• 🎵 Musical notation has 10_dozenal notes:
  _{1. C, 2. C♯, 3. D, 4. D♯, 5. E, 6. F, 7. F♯, 8. G, 9. G♯, X. A, E. A♯, 10. B}
• 🃏 Spanish-suited playing cards suits have 10_dozenal cards.
  _{1🃏, 2🃏, 3🃏, 4🃏, 5🃏, 6🃏, 7🃏, 8🃏, 9🃏, X🃏, E🃏, 10🃏}
• 🌘 There are about 10_dozenal lunar cycles a year, which has influenced a lot of cultures:
• 🏛️ There are 10_dozenal olympian gods in the greek and roman pantheon.
  _{1. Zeus, 2. Poseidon, 3. Hera, 4. Demeter, 5. Aphrodite, 6. Athena, 7. Artemis, 8. Apollo, 9. Ares, X. Hephaestus, E. Hermes, 10. Hestia.}
• 🔮 There are 10_dozenal zodiac signs.
  _{1. Aries, 2. Taurus, 3. Gemini, 4. Cancer, 5. Leo, 6. Virgo, 7. Libra, 8. Scorpio, 9. Sagittarius, X. Capricorn, E. Aquarius, 10. Pisces}
• 🇨🇳 Chinese astrology uses a 10_dozenal year cycle, with each year represented by a different animal sign.
  _{1. Rat, 2. Ox, 3. Tiger, 4. Rabbit, 5. Dragon, 6. Snake, 7. Horse, 8. Goat, 9. Monkey, X. Rooster, E. Dog, 10. Pig}

Should we switch to dozenal?

Dozenal has many advantages over decimal, but making all of our society switch to dozenal would be very hard.

One of the biggest challenges would be the metric system, because it uses a decimal base, we should have to completely change it to use a dozenal base, which isn't hard by itself, the hard part would be teaching that to the billions of humans we are on earth!

There are communities like the Dozenal Society of America, the Dozenal Society of Great Britain, and some online communities that try to share and promote the use of dozenal.

This website is just a fun place to learn about dozenal, do you think the advantages of dozenal would be worth the difficulty of switching? That's up to you to answer!

Practice dozenal arithmetic

This is a tool to practice dozenal arithmetic. It's recommended to master addition and substraction on the Medium level before trying more difficult arithmetic operations.

Decimal to dozenal converter

Add a decimal number, and it will be converted to dozenal.

Currently, it just supports natural numbers, negative numbers and decimals are not supported yet.

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