DiffCheck

Number Format Converter

Convert numbers to thousands-separated, scientific notation, currency, compact, and more formats. Supports custom separators and 10+ currencies.

1,234,567.89

All Formats

Thousands1,234,567.89
Scientific1.2346e+6
Currency$1,234,567.89
Compact1.235M
Fixed1234567.89
Integer1234567
Percent123456789.00%
Plain1234567.89

What Is the Number Format Converter?

The Number Format Converter transforms any numeric value into multiple display formats simultaneously. Paste a number and instantly see its thousands-separated, scientific notation, currency, compact, fixed decimal, integer, and percentage representations — all on one screen.

This tool is useful for developers formatting output, data analysts preparing reports, financial teams displaying monetary values, and anyone who needs to present numbers in a specific locale or style.

How to Use the Number Format Converter

  1. Enter a number in the input field, or click one of the sample values to populate it.
  2. Select a format mode: Thousands, Scientific, Currency, or Compact.
  3. Adjust mode-specific options — decimal places, separator character, currency, or precision.
  4. The primary output shows the selected format. The All Formats table below shows every format at once.
  5. Click Copy on any row to copy that specific format to the clipboard.

Features

  • Thousands format with configurable decimal places and separator (comma, dot, space, underscore, or none)
  • Scientific notation with adjustable significant digits
  • Currency format supporting USD, EUR, GBP, JPY, CNY, KRW, INR, CAD, AUD, CHF and more
  • Compact notation — K, M, B, T abbreviations
  • Fixed decimal, integer truncation, and percentage output
  • All formats shown in a summary table with one-click copy per row
  • Handles negative numbers, decimals, and scientific input (e.g. 1.5e6)

FAQ

What is scientific notation?

Scientific notation expresses a number as a coefficient multiplied by a power of ten. For example, 1234567.89 becomes 1.23456789e+6. It is commonly used in science and engineering to represent very large or very small numbers compactly.

How does the currency formatter work?

The currency formatter uses the browser's built-in Intl.NumberFormat API with the selected currency code and locale. This ensures correct symbol placement, grouping separators, and decimal conventions for each currency.

What is compact notation?

Compact notation abbreviates large numbers using suffix letters: K for thousands, M for millions, B for billions, and T for trillions. For example, 1500000 becomes 1.5M.

Can I change the thousands separator?

Yes. In Thousands mode, choose comma (,), dot (.), space, underscore, or no separator. European locales typically use a dot as the thousands separator and a comma as the decimal separator.