How Many Zeros in a Billion? Zeros in Million, Trillion and Beyond
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A billion has 9 zeros: 1,000,000,000. That is 10^9, or one thousand million. The chart below gives the zero count for every common large number name, so you can check any of them quickly.
How many zeros in a billion
In modern English (the short scale), one billion is written 1,000,000,000. Count the zeros after the 1 and you get 9, written as 10^9. It equals 1,000 millions.
Some languages and older British texts use the long scale, where a billion means a million millions. In that system a billion has 12 zeros. If a source could be using either system, writing 10^9 or 10^12 removes the doubt.
Zeros chart: thousand to vigintillion
| Name | Written with commas | Number of zeros |
|---|---|---|
| Thousand | 1,000 | 3 |
| Million | 1,000,000 | 6 |
| Billion | 1,000,000,000 | 9 |
| Trillion | 1,000,000,000,000 | 12 |
| Quadrillion | 1,000,000,000,000,000 | 15 |
| Quintillion | 1,000,000,000,000,000,000 | 18 |
| Sextillion | 1,000,000,000,000,000,000,000 | 21 |
| Septillion | 1,000,000,000,000,000,000,000,000 | 24 |
Larger names continue the same pattern of three extra zeros per step:
| Name | Power of 10 | Number of zeros |
|---|---|---|
| Octillion | 10^27 | 27 |
| Nonillion | 10^30 | 30 |
| Decillion | 10^33 | 33 |
| Undecillion | 10^36 | 36 |
| Duodecillion | 10^39 | 39 |
| Tredecillion | 10^42 | 42 |
| Quattuordecillion | 10^45 | 45 |
| Quindecillion | 10^48 | 48 |
| Sexdecillion | 10^51 | 51 |
| Septendecillion | 10^54 | 54 |
| Octodecillion | 10^57 | 57 |
| Novemdecillion | 10^60 | 60 |
| Vigintillion | 10^63 | 63 |
Quick answers
- How many zeros in a million: 6 (1,000,000).
- How many zeros in a billion: 9 (1,000,000,000).
- How many zeros in a trillion: 12 (1,000,000,000,000).
- How many zeros in a quadrillion: 15.
- How many zeros in ten thousand: 4 (10,000).
- How many zeros in a hundred thousand: 5 (100,000).
- How many zeros in ten million: 7. In a hundred million: 8.
- How many zeros in a googol: 100 (10^100).
Zeros in lakh and crore
The Indian numbering system groups digits differently. One lakh is 1,00,000, which has 5 zeros and equals one hundred thousand. One crore is 1,00,00,000, which has 7 zeros and equals ten million. So one billion is 100 crore.
How to count zeros without a chart
Each short-scale name from million onward has a Latin prefix that gives a number n. The zero count is 3n + 3. Billion uses bi (2), so 3 × 2 + 3 = 9. Trillion uses tri (3), so 3 × 3 + 3 = 12.
For a number already written out, add commas every three digits from the right. Each full group of 000 adds three zeros, so 1,000,000,000 has three groups and 9 zeros.
Check it with the calculator
Enter 10 as the base and 9 as the exponent in the power calculator. The result is 1,000,000,000, the digit count shows 10 digits (a 1 plus 9 zeros), and the words section reads it as one billion.