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Add Thousands Separators

Format numbers with commas, periods or spaces between every three digits.

  • Free
  • Real-time
  • Runs locally
Formats as you type
Ln 1, Col 1

Format

Output style

Comma groups, period decimals (US, UK, most of Asia).

Numbers in your text use a

Decimal places

Formatted

0

Numbers

Left as is

0

Short, leading zero or scientific

0 formatted

Make long numbers easy to read by adding thousands separators: 1234567.89 becomes 1,234,567.89. Paste a single number, a list, or a whole report, and every number is formatted in place while the rest of the text stays exactly as it was.

Choose the style your readers expect: commas (US and UK), periods with a decimal comma (much of Europe), narrow spaces (French and SI style), apostrophes (Swiss) or Indian lakh and crore grouping. Numbers that already have separators are converted, years like 2026 are left alone, and decimals can be rounded. Everything runs in your browser.

01

How to add thousands separators

  1. STEP 01

    Paste your numbers

    Paste numbers or any text that contains them. Formatted text appears below as you type.

  2. STEP 02

    Pick the output style

    Choose commas, periods, spaces, apostrophes or Indian grouping, and tell the tool how decimals are written in your text.

  3. STEP 03

    Copy the result

    Optionally round to a number of decimal places, then copy or download the formatted text.

02

Features

  • Five grouping styles

    1,234,567.89 · 1.234.567,89 · 1 234 567,89 · 1'234'567.89 · 12,34,567.89.

  • Formats inside text

    Numbers in sentences, tables and lists are formatted while words and punctuation stay untouched.

  • Converts existing formats

    Turn 1,234.5 into 1.234,5 or the other way round in one step.

  • Years and codes protected

    Four-digit years, numbers with leading zeros and codes like ID12345 are left as they are.

  • Exact rounding

    Round to 0–3 decimal places using exact decimal arithmetic, so 2.675 rounds to 2.68.

  • Negative numbers and dates

    Minus signs are kept, while the hyphens in dates and ranges are not mistaken for them.

03

Thousands separators around the world

English-speaking countries group thousands with commas and use a period for decimals. Much of continental Europe and South America does the reverse, with periods between thousands and a decimal comma. France and the international SI style use a thin space, Switzerland often uses an apostrophe, and India groups the first three digits and then every two (lakh and crore).

Using the expected format avoids costly misunderstandings: 1.250 means one and a quarter in the US but one thousand two hundred and fifty in Germany.

04

Frequently asked questions

How do I add commas to numbers?

Paste your text and keep the 1,234,567.89 style selected. Every number with five or more digits gets a comma between each group of three digits.

Why is 2026 not changed to 2,026?

Four-digit whole numbers are usually years, PINs or codes, so they are left alone by default. Turn off “Leave 4-digit numbers alone” to format them too, as in 5,000.

Can I convert European numbers to US format?

Yes. Choose “Decimal comma” for the input and the 1,234,567.89 output style. 1.234.567,5 becomes 1,234,567.5.

Which space is used for the space style?

A narrow no-break space, as recommended by the SI and French typography. It keeps the digit groups on one line and looks right in documents and on the web.

How does Indian number grouping work?

The last three digits form one group and the remaining digits are grouped in pairs, so ten million is written 1,00,00,000 (one crore).

Is my data uploaded?

No. Numbers are formatted in your browser and nothing is sent to a server.

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