Million, Billion, Trillion & Quadrillion Converter
Convert large numbers across the international short scale used in modern English: thousand, million, billion, trillion, quadrillion and quintillion.
Convert large-number scales
Convert thousand, million, billion, trillion, quadrillion and quintillion using the modern English short scale.
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The locale changes separators only. It does not convert currencies or exchange rates.
International Large-Number Scale
| Name | Power of 10 | Full number |
|---|---|---|
| Thousand | 10³ | 1,000 |
| Million | 10⁶ | 1,000,000 |
| Billion | 10⁹ | 1,000,000,000 |
| Trillion | 10¹² | 1,000,000,000,000 |
| Quadrillion | 10¹⁵ | 1,000,000,000,000,000 |
| Quintillion | 10¹⁸ | 1,000,000,000,000,000,000 |
This calculator uses the modern English short scale, where each new -illion step is 1,000 times the previous one. That is the convention users generally encounter in current US and international English-language business, science and media.
Popular Conversions
Why a Billion Can Be Easy to Misread
The step from million to billion is not ten times; it is 1,000 times. A billion is 1,000 million, and a trillion is 1,000 billion. Showing the full number alongside the named scale makes financial reports, company valuations, population figures, data sizes and scientific quantities easier to check.
For exact integer arithmetic beyond ordinary browser-number precision, use our Big Number Calculator. For powers of ten and E notation, use the Scientific Notation Calculator.
Frequently Asked Questions
How many millions are in a billion?
There are 1,000 million in 1 billion on the modern English short scale.
How many billions are in a trillion?
There are 1,000 billion in 1 trillion.
How many trillions are in a quadrillion?
There are 1,000 trillion in 1 quadrillion.
Does this convert currencies?
No. This tool converts number scales only. Locale formatting changes separators but not currency or exchange rates.