Million Calculator
A million calculator is a free online tool that converts between number scales including million, billion, trillion, thousand, lakh, crore, and arab. This calculator bridges the Western numbering system (million/billion) with the Indian numbering system (lakh/crore). To convert any raw number into millions, use our number to million converter. For currency conversions, use our currency converter or count physical cash with the money counter calculator.
Number:
From:
To:
How to Convert Between Number Scales
Converting between million, billion, lakh, and crore is simple once you know the scale factors. Follow these steps:
- Identify the number and its current scale (e.g., 5 million).
- Convert to the base value by multiplying by the scale factor (5 × 1,000,000 = 5,000,000).
- Divide by the target scale factor to get the converted value.
- For million to lakh: multiply by 10 (1 million = 10 lakh).
- For billion to crore: multiply by 100 (1 billion = 100 crore).
Formula
The million calculator uses a simple ratio formula to convert between any two number scales:
Converted Value = Number x (From Scale Factor / To Scale Factor)
Scale Factors:
1 Thousand = 1,000
1 Lakh = 100,000 (1,00,000)
1 Million = 1,000,000 (10,00,000)
1 Crore = 10,000,000 (1,00,00,000)
1 Billion = 1,000,000,000
1 Arab = 1,000,000,000 (1,00,00,00,000)
1 Trillion = 1,000,000,000,000
1 Kharab = 100,000,000,000 (1,00,00,00,00,000)Example
Convert 2.5 million to lakhs and crores:
2.5 Million = 2,500,000
To Lakhs:
2,500,000 / 100,000 = 25 Lakhs
To Crores:
2,500,000 / 10,000,000 = 0.25 Crore
Verification:
25 Lakhs = 25 x 1,00,000 = 25,00,000 = 2,500,000 ✓
0.25 Crore = 0.25 x 1,00,00,000 = 25,00,000 = 2,500,000 ✓Technical Details
Short Scale vs Long Scale: This calculator uses the short scale system (US, UK, modern international standard) where each new term represents 1,000× the previous: thousand → million → billion → trillion. In the long scale (historically used in some European countries), a billion means a million million (10¹²). All international finance, media, and scientific publications now use the short scale.
Indian Numbering System: The Indian system groups digits in pairs after the thousands place. The hierarchy is: thousand (10³), lakh (10⁵), crore (10⁷), arab (10⁹), kharab (10¹¹). This system is used in India, Pakistan, Bangladesh, Nepal, and Sri Lanka for official and financial documents.
Precision: This calculator uses JavaScript 64-bit floating-point arithmetic (IEEE 754), providing 15-17 significant decimal digits of precision. Results are displayed with up to 4 decimal places. For numbers exceeding 10¹⁵, consider using scientific notation.
Real-World Applications: Number scale conversion is essential in international finance (comparing GDP figures across countries), journalism (reporting population or budget numbers), business (company valuations, revenue figures), and education (teaching place value and number systems).
Number Scale Equivalents Reference Table
| Western | Indian | Numeric Value | Zeros |
|---|---|---|---|
| 1 Thousand | 1 Thousand | 1,000 | 3 |
| 10 Thousand | 10 Thousand | 10,000 | 4 |
| 100 Thousand | 1 Lakh | 100,000 | 5 |
| 1 Million | 10 Lakhs | 1,000,000 | 6 |
| 10 Million | 1 Crore | 10,000,000 | 7 |
| 100 Million | 10 Crores | 100,000,000 | 8 |
| 1 Billion | 100 Crores (1 Arab) | 1,000,000,000 | 9 |
| 100 Billion | 1 Kharab | 100,000,000,000 | 11 |
| 1 Trillion | 10 Kharab | 1,000,000,000,000 | 12 |
Frequently Asked Questions
How many lakhs make a million?
10 lakhs = 1 million. One lakh is 100,000 and one million is 1,000,000. So 10 x 100,000 = 1,000,000.
How many crores make a billion?
100 crores = 1 billion. One crore is 10,000,000 (10 million) and one billion is 1,000,000,000. So 100 x 10,000,000 = 1,000,000,000.
What is the Indian numbering system?
The Indian system groups digits differently: after thousands, it groups by two digits instead of three. So 10,00,000 (ten lakh) instead of 1,000,000 (one million). The hierarchy is: thousand, lakh (100K), crore (10M), arab (1B), kharab (100B).
What comes after trillion?
In the Western system: quadrillion (10^15), quintillion (10^18), sextillion (10^21). In the Indian system after kharab: neel (10^13), padma (10^15), shankh (10^17).
Why do India and the West use different systems?
The Indian system has ancient roots in Vedic mathematics and groups numbers in pairs after thousands. The Western system uses groups of three (thousands, millions, billions). Both are valid; the Indian system is used in South Asia while the Western system is used globally in finance.