About the Number Converter
The Number Converter turns any integer or decimal into a dozen useful representations at once. Type once, see the same value as English words, short-scale magnitudes (million, billion, trillion), Indian lakh and crore, scientific notation, engineering notation, base-2 / base-8 / base-16, and Roman numerals — all live, all in your browser.
Nothing you type is sent anywhere. Everything runs client-side in JavaScript, so it works offline once loaded and there is no rate limit.
Common uses
- Writing large numbers in prose — turn
1,234,567,890into "one billion two hundred thirty-four million…" - Cross-region money & population figures — see US "1.23 billion" and Indian "123 crore" side-by-side.
- Scientific writing — Avogadro's number 6.022 × 10²³ or Planck's constant instantly.
- Base conversion for programmers — decimal ↔ hex ↔ binary without switching tabs.
- Roman numerals for titles, chapter numbers, and clock faces — up to 3999.
Short scale vs Indian numbering
Most of the English-speaking world uses short scale — thousand → million → billion → trillion, each step ×1,000. India and much of South Asia use lakh (100,000) and crore (10,000,000), then arab (10⁹) and kharab (10¹¹). The converter shows both formats so cross-border numbers are unambiguous — a "billion-dollar company" in Silicon Valley is "10,000 crore" in Mumbai.
Scientific & engineering notation
Scientific notation writes any number as a single-digit mantissa × a power of 10. Engineering notation is the same idea but restricts the exponent to multiples of 3, aligning with SI prefixes (kilo, mega, giga…). Very large or very small numbers become readable — 0.0000000000000000000001 becomes 1 × 10⁻²².
Hex, binary, and octal
For integer inputs, the converter shows the value in base 2 (binary), base 8 (octal), and base 16 (hexadecimal) — with standard 0x, 0b, and 0o prefixes. Decimals and negatives are skipped for base output since they don't have a single canonical form.
Privacy
No servers involved. Your input never leaves your device. Bookmark the page for offline access.