🔢Number Digit Formatting
Convert large numbers to formats like commas (1,000,000), Korean units (100만/1 million), underscores (1_000_000), or scientific (1.0e6). Useful for reports, data tables, readability, receipts, and invoices.
How to use
- 1Enter a number.
- 2Multiple format conversions display.
- 3Copy the format you want.
FAQ
Does it handle very large numbers?+
Uses BigInt for unlimited digits. Even 100-digit numbers convert accurately.
What are Korean units?+
1만 (10⁴), 1억 (10⁸), 1조 (10¹²), 1경 (10¹⁶), etc. Korean large-number notation, different from English (thousand/million/billion).
Why underscores?+
Programming languages (JavaScript, Python, etc.) support underscores in large numbers like 1_000_000 for readability. This tool converts quickly.
When is scientific notation useful?+
Very large or very small numbers (astronomy, physics, statistics). 1.5e6 = 1,500,000.
Negatives and decimals?+
Yes — negatives (-1,000), decimals (1,234.56), negative exponents (1.5e-5) all supported.
Chinese-character numerals (壹·萬·億)?+
Currently Korean Hangul units only. Chinese-character numerals need a separate tool.