Here are the name of numbers of zeros using the quick scale. (Todd Helmenstine,

Have ever before wondered how numerous zeros room in a million, billion, or trillion? carry out you know how numerous zeros room in a vigintillion or a googol? Knowing how to compose ordinary large numbers is advantageous for science ormath course (or your bank account, if you space rich). Use your understanding of the gigantic numbers to admire your friends.

You are watching: How many zeros are in one trillion

Numbers based on Groups of three Zeros

While ten and also a hundred gain their own name, larger numbers are based on groups of 3 zeros. This table offers the name for the groups of zeros in a number.

NameNumber the ZerosGroups that (3) Zeros
Thousand31 (1,000)
Ten thousand4(10,000)
Hundred thousand5(100,000)
Million62 (1,000,000)
Billion93 (1,000,000,000)
Trillion124 (1,000,000,000,000)

What the numbers Look prefer Written Out

A table can be useful to look up how numerous zeros big numbers have. But, if you must know just how to create them, it helps to check out them written out in all your glory.

Ten: 10 (1 zero)Hundred: 100 (2 zeros)Thousand: 1000 (3 zeros)Ten thousands 10,000 (4 zeros)Hundred thousands 100,000 (5 zeros)Million 1,000,000 (6 zeros)Billion 1,000,000,000 (9 zeros)Trillion 1,000,000,000,000 (12 zeros)Quadrillion 1,000,000,000,000,000 (15 zeros)Quintillion 1,000,000,000,000,000,000 (18 zeros)Sextillion 1,000,000,000,000,000,000,000 (21 zeros)Septillion 1,000,000,000,000,000,000,000,000 (24 zeros)Octillion 1,000,000,000,000,000,000,000,000,000 (27 zeros)Nonillion 1,000,000,000,000,000,000,000,000,000,000 (30 zeros)Decillion 1,000,000,000,000,000,000,000,000,000,000,000 (33 zeros)

Zeros group in sets of 3

The bigger a numeral gets, the harder it i do not care to count the digits. So, digits in big numbers room grouped in sets of three. Write numbers with commas separating sets of three zeros so the it’s less complicated to read and also understand the value. For example, compose one million together 1,000,000 fairly than 1000000. The set of 3 starts as you relocate to the left the a decimal allude (the last zero). So, you write 10,000 rather than 100,00. Commas aren’t typically used after the decimal point, unless you’re dealing with a value containing a big number the digits, choose pi. Periodically a room is used instead of a comma to separate digits.

As one more example, it’s much less complicated to remember the a trillion is written with 4 sets of three zeros than it is to count out 12 separate zeroes. While you could think the that one is pretty simple, simply wait till you have to count 27 zeros because that an octillion or 303 zeros for a centillion. The is simpler to remember nine and also 101 set of zeros, respectively.

Numbers with Very huge Numbers that Zeros

The numbergoogol(termed byMilton Sirotta) has 100 zeros after ~ it. Here’s what a googol watch like, created out with every one of its zeros:


A googol is 10 increased to the 100 power.

You may notice the number googol bears a same to the company name Google. This isn’t by accident. Google is a mis-spelling of googol and fits the company’s goal of being an extremely huge search engine.

Do girlfriend think the googol is big? How about thegoogolplex, which is a one adhered to by a googol that zeros. The googolplex is so huge its worth exceeds the variety of atoms in the well-known universe.

Yet, a googolplex isn’t the largest number described to date. Graham’s number is so massive it can’t even be described using everyday mathematics. As soon as Graham’s number was explained in 1977, it to be the biggest positive integer supplied in a mathematics proof. Because then, even larger numbers have been described, such together TREE(3).

Short Scale and Long Scale

The names given to big numbers based upon powers of ten vary between different countries. The two key naming systems room the short scale and also the long scale. The unified States offers the quick scale, in which a billion is 1,000 million and is created as a one followed by ripe zeros.

See more: How Many Calories To Burn To Lose A Pound Of, Counting Calories: Get Back To Weight

The long scale is provided in France and also was previously offered in the united Kingdom. In the long scale, a billion means one million million. Follow to this an interpretation of a billion, the number is written with a one followed by 12 zeros. Both the quick scale and long scale were described by French mathematician Genevieve Guitel in 1975.