How Many Zeros?

Zero might seem like "nothing," but when it comes to large numbers, it changes everything. The number of zeroes tells you how big a number really is.

Whether you're looking at your bank account, social media followers, or data in terabytes — the difference between three zeros and nine zeros is massive.

This guide is your one-stop answer to the question:
"How many zeroes are in…?"

Zeros are small — but they hold massive power in math. In our number system, every zero you add increases the number's size tenfold.

Just one zero turns:

1 → 10
Two zeros:
1 → 100
Three zeros:
1 → 1,000

Each added zero is like adding a layer of magnitude.

How Many Zeroes in Common Large Numbers?

Let's break it down with a quick-reference chart:

Number	Zeros	Numeric Form
Thousand	3	1,000
Million	6	1,000,000
Billion	9	1,000,000,000
Trillion	12	1,000,000,000,000
Quadrillion	15	1,000,000,000,000,000
Quintillion	18	1,000,000,000,000,000,000
Sextillion	21	1,000,000,000,000,000,000,000
Septillion	24	1 followed by 24 zeros
Octillion	27	1 followed by 27 zeros
Nonillion	30	1 followed by 30 zeros
Decillion	33	1 followed by 33 zeros
Undecillion	36	1 followed by 36 zeros
Duodecillion	39	1 followed by 39 zeros
Tredecillion	42	1 followed by 42 zeros
Quattuordecillion	45	1 followed by 45 zeros
Quindecillion	48	1 followed by 48 zeros
Vigintillion	63	1 followed by 63 zeros
Googol	100	1 followed by 100 zeros
Googolplex	10^100	1 followed by 10¹⁰⁰ zeros

What Does Each Zero Add?

Each zero at the end of a number multiplies it by 10.

Example:

1 zero → 10 (10¹)
2 zeros → 100 (10²)
3 zeros → 1,000 (10³)

So every group of three zeros usually marks a big leap:

Thousand (3 zeros)
Million (6 zeros)
Billion (9 zeros)
Trillion (12 zeros)

This system is called the base-10 or decimal system, which is how we count and measure most things in everyday life.

Scientific Notation

Use powers of 10:

10³ = 1,000 → 3 zeros
10⁶ = 1,000,000 → 6 zeros
10¹² = 1,000,000,000,000 → 12 zeros

The exponent tells you how many zeros come after the 1.

What's the Biggest Number with Zeros?

A googol has 100 zeros:br> 10¹⁰⁰ = 1 followed by 100 zeros

A googolplex has a googol of zeros — you physically can't write it out because it's too big to fit in the universe!

Zeros may look like "nothing," but they carry serious weight. The number of zeroes in a number defines its power, its size, and its meaning. Whether you're calculating data, money, or cosmic distances, knowing how many zeroes are in a number helps you put things in perspective.

How Many Zeros in Large Numbers List

This list shows how many zeros are in various large numbers, starting from a hundred up to a googolplex.

Hundred — 2 zeros
Thousand — 3 zeros
Ten thousand — 4 zeros
Hundred thousand — 5 zeros
Million — 6 zeros
Ten million — 7 zeros
Hundred million — 8 zeros
Billion — 9 zeros
Trillion — 12 zeros
Quadrillion — 15 zeros
Quintillion — 18 zeros
Sextillion — 21 zeros
Septillion — 24 zeros
Octillion — 27 zeros
Nonillion — 30 zeros
Decillion — 33 zeros
Undecillion — 36 zeros
Duodecillion — 39 zeros
Tredecillion — 42 zeros
Quattuordecillion — 45 zeros
Quindecillion — 48 zeros
Sexdecillion — 51 zeros
Septendecillion — 54 zeros
Octodecillion — 57 zeros
Novemdecillion — 60 zeros
Vigintillion — 63 zeros
Centillion — 303 zeros (US)
Googol — 100 zeros
Googolplex — 10¹⁰⁰ zeros

How Many Zeros?

How Many Zeroes in Common Large Numbers?

What Does Each Zero Add?

Scientific Notation

What's the Biggest Number with Zeros?

How Many Zeros in Large Numbers List

Common Large Numbers

Digital Storage Units

Indian Numbering System

Fun Stuff