NumbersAbout 10 billion
Ten billion is a thousand crore, or ten arab. In India an amount of this size is nearly always said in crores: "a thousand crore rupees".
10 billion in other units
The same amount can be named in thousands, lakhs, millions, crores or billions. Divide by the size of the unit: a thousand has 3 zeros, a lakh 5, a million 6, a crore 7, a billion 9 and a trillion 12.
| Unit | 10 billion is |
|---|---|
| Thousands | 10,000,000 |
| Lakhs | 100,000 |
| Millions | 10,000 |
| Crores | 1,000 |
| Billions | 10 |
| Trillions | 0.01 |
Where the commas go
In the Indian system the first comma comes after three digits from the right and then after every two: 10,00,00,00,000. In the international system a comma comes after every three digits: 10,000,000,000. The digits are the same in both. The Indian form has 4 commas and the international form has 3.
Place value
10 billion has 11 digits. Its leading digit, 1, is in the thousand crores (ten arab) place in the Indian system, which the international system calls the ten billions place. Every place after it holds a zero.
How big is 10 billion?
- In time. 10,00,00,00,000 seconds make 317 years, 35 days, 17 hours, 46 minutes and 40 seconds. Counting aloud from 1 at one number a second, without a break, would take that long to reach 10 billion.
- In minutes. 10,00,00,00,000 minutes are 19,025 years, 319 days, 10 hours and 40 minutes.
- In money. 10,00,00,00,000 paise are ₹100,000,000. 10,00,00,00,000 one-rupee coins are, of course, ₹10,00,00,00,000, written on a cheque as "Rupees One Thousand Crore Only".
- In length and weight. 10,00,00,00,000 metres are 10,000,000 km, and 10,00,00,00,000 grams are 10,000,000 kg, which is 10,000 tonnes.
Ten times more and ten times less
Ten times 10 billion is 1,00,00,00,00,000 (10,000 crore), which is 100 billion. One tenth of it is 1,00,00,00,000 (100 crore), which is 1 billion. Each step adds or removes one zero.
Mistakes to avoid
- Count the zeros before you write: 10 billion has 10. One zero too many makes it ten times larger.
- Do not mix the comma styles in one number. Write 10,00,00,00,000 or 10,000,000,000.
- In words, the unit stays singular after a number: "10 billion", not "10 billions".
Common questions
How many zeros are there in 10 billion?
10 billion is written 10,00,00,00,000. It has 10 zeros and 11 digits in all.
What is 10 billion in lakhs and crores?
10 billion is 1,000 crore. In lakhs it is 100,000 lakh, in crores 1,000 crore and in millions 10,000 million.
How do you write 10 billion in words?
In the Indian system: one thousand crore. In the international system: ten billion. In Hindi: दस अरब.