Convert Rial to Toman and Back

One toman is ten rial, and that single zero is behind most money mistakes: a price written in rial on a site is spoken in toman day to day, and a check has to spell it out. This tool takes the number in Persian or Latin digits, ignores thousands separators and does two things: converts rial to toman or back, and writes the amount out in Persian words with the right unit. The arithmetic uses big integers, so billion- and trillion-scale amounts stay exact with no rounding and no lost zeros. Note that converting rial to toman drops any remainder under ten rial, since toman is the larger unit.

This tool runs entirely in your browser. No data is sent to any server.

How to use it

1. 1

   Type the amount into the box; Persian and Latin digits both work.

2. 2

   Press “rial” or “toman” to set the direction of the conversion.

3. 3

   Read the converted amount and its written form, then copy it with the button.

Frequently asked questions

How do rial and toman relate?

One toman is ten rial. Converting rial to toman removes a zero; converting toman to rial adds one.

Why is the rial remainder dropped?

Because toman is the larger unit and the output is whole numbers. 1,234,567 rial becomes 123,456 toman with 7 rial left unshown.

Is the written form correct for a check?

It writes the number and unit correctly, but a given bank may want extra wording such as “only”. Take the text and complete it to your bank’s format.