Rounding & Significant Figures

It rounds any number to a chosen number of decimal places or significant figures. For example, 3.14159 rounded to 2 decimal places gives 3.14, and to 3 significant figures gives 3.14 as well. For 0.004567, 2 significant figures give 0.0046, while 2 decimal places give just 0.00.

Select the place-value mode and pick 10, 100 or 1000. For 1,23,456 rounded to the nearest 1000, you get 1,23,000. This is exactly how census, budget and population figures are quoted in Indian newspapers. The tool also shows the rounded value in the Indian comma format with lakhs and crores.

The standard school rule is round half up: 2.5 becomes 3 and 3.5 becomes 4. The tool follows this convention by default. There is also banker's rounding, which rounds 0.5 to the nearest even number to avoid bias in large datasets; that mode is available as an option for accounting use.

Decimal places fix the position after the dot, useful for money and measurements like 99.95 rupees. Significant figures fix the count of meaningful digits, useful in science where 0.00456 has 3 significant figures regardless of leading zeros. Engineering and physics usually want significant figures, accounting wants decimal places.

Computers store some decimals approximately, so 0.1 plus 0.2 may show as 0.30000000000000004 internally. After rounding to 2 places you still get 0.30, but very long calculations can drift. This tool rounds the final displayed value cleanly without scientific notation, so you always see ordinary decimals.

Yes. Pick 0 decimal places and the tool gives a clean rupee figure. So 1499.75 rounds to 1500, and 1499.40 rounds to 1499. This is how GST invoices, EMI schedules and salary slips usually show the final payable amount. For paise-level accuracy, switch back to 2 decimal places.