Math

Rounding calculator

Round to nearest, down or up, to n decimal places or n significant figures.

Embed this calculator on your website

Copy this code and paste it into your page (WordPress, Wix, Webflow, HTML…). It's free: please keep the link to HOD Calc.

How it works

Round to nearest: 5 and above → up. Round down (floor) and round up (ceiling) are also shown.

Results are for guidance only and do not replace professional advice.

Worked example

With the default values:

  • Number3.14159265
  • Decimal places or digits3
  • Round ton decimal places

you get:

  • Rounded to nearest3.142
  • Rounded down3.141
  • Rounded up3.142
  • Scientific notation3.142 × 10^0

Frequently asked questions

How does the “Rounding calculator” tool work?

Round to nearest: 5 and above → up. Round down (floor) and round up (ceiling) are also shown.

What do I need to enter?

Just fill in: number, decimal places or digits, round to. The result updates as you type.

Can you give an example?

Number: 3.14159265; Decimal places or digits: 3; Round to: n decimal places → Rounded to nearest: 3.142; Rounded down: 3.141.

Is this calculator free, and is my data private?

Yes. HOD Calc is completely free with no sign-up. The calculation runs in your browser: nothing you type is sent or stored.