Convert Number Systems Online

Convert numbers between decimal, binary, hexadecimal, and octal quickly and accurately. Perfect for programming, engineering, and mathematical calculations.

  • One (Base Unit)
  • Pair
  • Trio
  • Quadruple
  • Quintuple
  • Dozen (dz)
  • Score
  • Gross
  • Great Gross
  • Hundred
  • Thousand (K)
  • Million (M)
  • Billion (B)
  • Trillion (T)
  • Quadrillion (P)
  • Quintillion (E)
  • Sextillion
  • Septillion
  • Octillion
  • Nonillion
  • Decillion
  • Googol
  • Kilo (k, ×10³)
  • Mega (M, ×10⁶)
  • Giga (G, ×10⁹)
  • Tera (T, ×10¹²)
  • Peta (P, ×10¹⁵)
  • Exa (E, ×10¹⁸)
  • Zetta (Z, ×10²¹)
  • Yotta (Y, ×10²⁴)
  • Milli (m, ×10⁻³)
  • Micro (μ, ×10⁻⁶)
  • Nano (n, ×10⁻⁹)
  • Pico (p, ×10⁻¹²)
  • Femto (f, ×10⁻¹⁵)
  • Atto (a, ×10⁻¹⁸)
  • Zepto (z, ×10⁻²¹)
  • Yocto (y, ×10⁻²⁴)
  • Decimal
  • Binary
  • Octal
  • Hexadecimal
  • Scientific Notation
  • Roman Numerals
  • Percentage
  • Parts Per Million (PPM)
  • Parts Per Billion (PPB)
  • One (Base Unit)
  • Pair
  • Trio
  • Quadruple
  • Quintuple
  • Dozen (dz)
  • Score
  • Gross
  • Great Gross
  • Hundred
  • Thousand (K)
  • Million (M)
  • Billion (B)
  • Trillion (T)
  • Quadrillion (P)
  • Quintillion (E)
  • Sextillion
  • Septillion
  • Octillion
  • Nonillion
  • Decillion
  • Googol
  • Kilo (k, ×10³)
  • Mega (M, ×10⁶)
  • Giga (G, ×10⁹)
  • Tera (T, ×10¹²)
  • Peta (P, ×10¹⁵)
  • Exa (E, ×10¹⁸)
  • Zetta (Z, ×10²¹)
  • Yotta (Y, ×10²⁴)
  • Milli (m, ×10⁻³)
  • Micro (μ, ×10⁻⁶)
  • Nano (n, ×10⁻⁹)
  • Pico (p, ×10⁻¹²)
  • Femto (f, ×10⁻¹⁵)
  • Atto (a, ×10⁻¹⁸)
  • Zepto (z, ×10⁻²¹)
  • Yocto (y, ×10⁻²⁴)
  • Decimal
  • Binary
  • Octal
  • Hexadecimal
  • Scientific Notation
  • Roman Numerals
  • Percentage
  • Parts Per Million (PPM)
  • Parts Per Billion (PPB)

Conversion Formula

Direct numerical conversion

Convert one-base-unit to Other Units

One to Pair

1 one = 0.5 pair

1 One (Base Unit) = 0.5 Pair

1 one-base-unit equals 0.5 pair.

One to Trio

1 one = 0.3333333333333333 trio

1 One (Base Unit) = 0.3333333333333333 Trio

1 one-base-unit equals 0.3333333333333333 trio.

One to Quadruple

1 one = 0.25 quadruple

1 One (Base Unit) = 0.25 Quadruple

1 one-base-unit equals 0.25 quadruple.

One to Quintuple

1 one = 0.2 quintuple

1 One (Base Unit) = 0.2 Quintuple

1 one-base-unit equals 0.2 quintuple.

One to Dozen

1 one = 0.08333333333333333 dozen

1 One (Base Unit) = 0.08333333333333333 Dozen (dz)

1 one-base-unit equals 0.08333333333333333 dozen.

One to Score

1 one = 0.05 score

1 One (Base Unit) = 0.05 Score

1 one-base-unit equals 0.05 score.

One to Gross

1 one = 0.006944444444444444 gross

1 One (Base Unit) = 0.006944444444444444 Gross

1 one-base-unit equals 0.006944444444444444 gross.

One to Great Gross

1 one = 0.0005787037037037037 great-gross

1 One (Base Unit) = 0.0005787037037037037 Great Gross

1 one-base-unit equals 0.0005787037037037037 great-gross.

One to Hundred

1 one = 0.01 hundred

1 One (Base Unit) = 0.01 Hundred

1 one-base-unit equals 0.01 hundred.

One to Thousand

1 one = 0.001 thousand

1 One (Base Unit) = 0.001 Thousand (K)

1 one-base-unit equals 0.001 thousand.

One to Million

1 one = 0.000001 million

1 One (Base Unit) = 0.000001 Million (M)

1 one-base-unit equals 0.000001 million.

One to Billion

1 one = 1e-9 billion

1 One (Base Unit) = 1e-9 Billion (B)

1 one-base-unit equals 1e-9 billion.

One to Trillion

1 one = 1e-12 trillion

1 One (Base Unit) = 1e-12 Trillion (T)

1 one-base-unit equals 1e-12 trillion.

One to Quadrillion

1 one = 1e-15 quadrillion

1 One (Base Unit) = 1e-15 Quadrillion (P)

1 one-base-unit equals 1e-15 quadrillion.

One to Quintillion

1 one = 1e-18 quintillion

1 One (Base Unit) = 1e-18 Quintillion (E)

1 one-base-unit equals 1e-18 quintillion.

One to Sextillion

1 one = 1e-21 sextillion

1 One (Base Unit) = 1e-21 Sextillion

1 one-base-unit equals 1e-21 sextillion.

One to Septillion

1 one = 1.0000000000000001e-24 septillion

1 One (Base Unit) = 1.0000000000000001e-24 Septillion

1 one-base-unit equals 1.0000000000000001e-24 septillion.

One to Octillion

1 one = 1e-27 octillion

1 One (Base Unit) = 1e-27 Octillion

1 one-base-unit equals 1e-27 octillion.

One to Nonillion

1 one = 9.999999999999999e-31 nonillion

1 One (Base Unit) = 9.999999999999999e-31 Nonillion

1 one-base-unit equals 9.999999999999999e-31 nonillion.

One to Decillion

1 one = 1e-33 decillion

1 One (Base Unit) = 1e-33 Decillion

1 one-base-unit equals 1e-33 decillion.

One to Googol

1 one = 1e-100 googol

1 One (Base Unit) = 1e-100 Googol

1 one-base-unit equals 1e-100 googol.

One to Kilo

1 one = 0.001 kilo

1 One (Base Unit) = 0.001 Kilo (k, ×10³)

1 one-base-unit equals 0.001 kilo.

One to Mega

1 one = 0.000001 mega

1 One (Base Unit) = 0.000001 Mega (M, ×10⁶)

1 one-base-unit equals 0.000001 mega.

One to Giga

1 one = 1e-9 giga

1 One (Base Unit) = 1e-9 Giga (G, ×10⁹)

1 one-base-unit equals 1e-9 giga.

One to Tera

1 one = 1e-12 tera

1 One (Base Unit) = 1e-12 Tera (T, ×10¹²)

1 one-base-unit equals 1e-12 tera.

One to Peta

1 one = 1e-15 peta

1 One (Base Unit) = 1e-15 Peta (P, ×10¹⁵)

1 one-base-unit equals 1e-15 peta.

One to Exa

1 one = 1e-18 exa

1 One (Base Unit) = 1e-18 Exa (E, ×10¹⁸)

1 one-base-unit equals 1e-18 exa.

One to Zetta

1 one = 1e-21 zetta

1 One (Base Unit) = 1e-21 Zetta (Z, ×10²¹)

1 one-base-unit equals 1e-21 zetta.

One to Yotta

1 one = 1.0000000000000001e-24 yotta

1 One (Base Unit) = 1.0000000000000001e-24 Yotta (Y, ×10²⁴)

1 one-base-unit equals 1.0000000000000001e-24 yotta.

One to Milli

1 one = 1000 milli

1 One (Base Unit) = 1000 Millis (m, ×10⁻³)

1 one-base-unit equals 1000 millis.

One to Micro

1 one = 1000000 micro

1 One (Base Unit) = 1000000 Microes (μ, ×10⁻⁶)

1 one-base-unit equals 1000000 microes.

One to Nano

1 one = 999999999.9999999 nano

1 One (Base Unit) = 999999999.9999999 Nanoes (n, ×10⁻⁹)

1 one-base-unit equals 999999999.9999999 nanoes.

One to Pico

1 one = 1000000000000 pico

1 One (Base Unit) = 1000000000000 Picoes (p, ×10⁻¹²)

1 one-base-unit equals 1000000000000 picoes.

One to Femto

1 one = 999999999999999.9 femto

1 One (Base Unit) = 999999999999999.9 Femtoes (f, ×10⁻¹⁵)

1 one-base-unit equals 999999999999999.9 femtoes.

One to Atto

1 one = 999999999999999900 atto

1 One (Base Unit) = 999999999999999900 Attoes (a, ×10⁻¹⁸)

1 one-base-unit equals 999999999999999900 attoes.

One to Zepto

1 one = 1.0000000000000001e+21 zepto

1 One (Base Unit) = 1.0000000000000001e+21 Zeptoes (z, ×10⁻²¹)

1 one-base-unit equals 1.0000000000000001e+21 zeptoes.

One to Yocto

1 one = 1.0000000000000001e+24 yocto

1 One (Base Unit) = 1.0000000000000001e+24 Yoctoes (y, ×10⁻²⁴)

1 one-base-unit equals 1.0000000000000001e+24 yoctoes.

One to Decimal

1 one = 1 decimal

1 One (Base Unit) = 1 Decimal

1 one-base-unit equals 1 decimal.

One to Binary

1 one = 1 binary

1 One (Base Unit) = 1 Binary

1 one-base-unit equals 1 binary.

One to Octal

1 one = 1 octal

1 One (Base Unit) = 1 Octal

1 one-base-unit equals 1 octal.

One to Hexadecimal

1 one = 1 hex

1 One (Base Unit) = 1 Hexadecimal

1 one-base-unit equals 1 hexadecimal.

One to Scientific Notation

1 one = 1 scientific

1 One (Base Unit) = 1 Scientific Notation

1 one-base-unit equals 1 scientific-notation.

One to Roman Numerals

1 one = 1 roman

1 One (Base Unit) = 1 Roman Numerals

1 one-base-unit equals 1 roman-numerals.

One to Percentage

1 one = 100 percentage

1 One (Base Unit) = 100 Percentages

1 one-base-unit equals 100 percentages.

One to Parts Per Million

1 one = 1000000 ppm

1 One (Base Unit) = 1000000 Parts Per Millions (PPM)

1 one-base-unit equals 1000000 parts-per-millions.

One to Parts Per Billion

1 one = 999999999.9999999 ppb

1 One (Base Unit) = 999999999.9999999 Parts Per Billions (PPB)

1 one-base-unit equals 999999999.9999999 parts-per-billions.

About Number Systems

Into some form of numerical values a number system is a special way to represent. It says how writing, reading and computing numbers works. The most widely used number systems are decimal (base-10), binary (base-2), octal (base-8) and hexadecimal (base-16), any of which are particularly suitable to different fields. While people favor the decimal system mainly, because digital technology employs binary as its basis.

Each number system has its own base or radix whose value describes how many unique digits it has. For instance, in decimal you see only numbers 0–9, while binary uses just 0 and 1. Understanding number systems is the foundation of mathematics, computer science and digital electronics, as well as the cornerstone for representing data processing, transmission. All these have critical implications for how things will actually work in practice.

Number systems are at the heart of a wide range of applications--from simple arithmetic to complex programming. They are essential tools in modern technology that allow for everything from converting between bases to designing logic circuits and encoding digital information.

Historical Development

The concept of number representation has been around since ancient times. Early men recorded counts on bones or stones. As society progressed, more structured number systems began to arise. The Babylonians used base-60 numbers; the Romans had Roman numerals and the Maya employed a vigesimal (base-20) system.

However, all this changed with the Hindu-Arabic Numeric system; because through the introduction of position notation and the concept of zero as placeholder numeral (our present mathematical foundation), it opened up an era of great prosperity and scientific achievement. This system has now become the global standard,Laying the ground for all subsequent mathematics.

As our understanding of nature’s laws grows, new number systems developed out of necessity. First published by Leibniz in the seventeenth century, binary eventually became the lingua franca of digital computation.

The development of number systems mirrors the increasing demands of human society for faster and more comprehensive ways to manipulate numbers. Each new form of notation and structure has opened up fresh possibilities in science, commerce, engineering and communication.

Modern Applications

Today, systems of numbers count for countless techniques. Ordinary numbers compose the root of computing systems, empowering more regular processors, memories and logic circuits but also run in RAM. Octal and hexadecimal systems are often used in software development and computer hardware design because they allow better representations than does binary data.

In mathematics, number systems are used in set theory, algebra, and number theory to explore properties of group theory and ring theory Real numbers and complex numbers were later added to the system. Engineers use them to design control systems, signal processing, but also in digital circuits.

Digital displays, encryption methods, color codes in web design, and IP addresses are just a few of the real-world examples where number systems play a role. For instance, a hex color code like #FF0000 represents RGB values in hexadecimal format.

In education, understanding how number systems work can not only increase logical reasoning but also lay a solid foundation for further studies in STEM fields. From children learning binary arithmetic to computer programmers using machine language, number systems are still an indispensable part of today’s intellectual ecosystem.

Future Developments

With the rapid rise of artificial intelligence (AI), quantum computing peripheral technologies have developed and are still evolving, such as advanced data algorithmic systems.The concept of qubits in quantum computing embodies intervals that can represent multiple digits at the same time-- potentially creating all new modes of representation for numbers beyond binary logic as we know them now.

AI and machine learning also need high-performance number representations to optimizes, trains algorithms, and handles large-scale data.Floating-point arithmetic, sparse matrix representations of computations, logarithmic number systems are already in use by developers, but new innovations are on the horizon.

And in the age of blockchain technology, the integrity of transactions hinges on number theory, cryptographic systems. The future may see number systems which modify data compression, error correction and secure communication on a massive scale as never before in history.As data grows exponentially, number systems may be designed to include features like error correction and secure communication on a massive scale--a recurring motif of systems architecture meant for transportation between the bounds of time in a home network or throughout roadside-to-space-frame cars onlySome number sequences circle around, repeating; others do not, and itis possible that everything will turn out quite different. Looking ahead, research into biology computing and molecular data storage might develop new number systems which have their roots in the natural world.The development of number systems in the future is not merely a matter of representation--it