Round any number three different ways: to a chosen number of decimal places, to a chosen number of significant figures, or to the nearest ten, hundred, thousand and beyond. Rounding trims a value to the precision you actually need, which matters for reporting measurements, tidying up currency, and following the significant-figure rules in science class. This calculator applies standard round-half-up behavior and shows all three results side by side so you can compare them at a glance. Significant figures count meaningful digits from the first non-zero digit, which is subtly different from decimal places, and getting that right by hand is easy to slip on. Enter your number and the settings, and every rounded form appears instantly. Everything is computed locally in your browser, so it is fast and private.
You can round to a set number of decimal places, to significant figures, or to the nearest ten, hundred or thousand.
Significant figures are the meaningful digits of a number, counting from the first non-zero digit, useful in science and measurement.
It uses standard rounding, so a trailing digit of 5 or more rounds up and less than 5 rounds down.
Round any number three different ways: to a chosen number of decimal places, to a chosen number of significant figures, or to the nearest ten, hundred, thousand and beyond. Rounding trims a value to the precision you actually need, which matters for reporting measurements, tidying up currency, and following the significant-figure rules in science class.
Yes. Rounding Calculator (Decimals and Sig Figs) is completely free, with no sign-up and no usage limits.
Yes. Rounding Calculator (Decimals and Sig Figs) runs in any modern web browser. There is nothing to download or install.
Yes. Rounding Calculator (Decimals and Sig Figs) runs entirely on your device in your browser, so nothing you enter is uploaded to a server.