Toolipedia- Free
- No sign-up
- Works on any device
No tool matches your search.
- Free
- No sign-up
- Works on any device
Create a QR code for a link, Wi-Fi, WhatsApp, contact and more, or read one from a photo.
- Free
- No sign-up
- Works on any device
Fill in the details to see your QR code.
PNG for phones, chats and websites. SVG and PDF stay sharp at any size, which is best for printing. Tip: point your phone camera at the preview to test it.
3. Style (optional): colors, dots, logo
Choose a photo or screenshot or drag it here
Works with photos of printed codes, screenshots and image files.
Looking for QR codes…
Significant figures calculator
Round any number to significant figures and count the significant figures in it.
- Free
- No sign-up
- Works on any device
About Significant figures calculator
Rounds a number to the significant figures you choose and counts how many a number already has. Leading zeros never count, trapped zeros always do, and trailing zeros count only after a decimal point. So 0.00450 has three, while 4500 may have just two.
How to use Significant figures calculator
- Type the number you want to work with.
- Enter how many significant figures to round to.
- Read the rounded value and the count of significant figures in the original.
Why use this tool?
- Private: everything happens in your browser. Nothing you enter is uploaded.
- Free, with no sign-up, no watermark and no limit on how often you use it.
- Works on phones, tablets and computers: Android, iPhone, Windows, Mac and Linux. Nothing to install.
- Free to embed on your own website, with a ready-made code to copy.
- Available in 10 languages.
Also known as
Frequently asked questions
How many significant figures are in 0.0120?
Three: the 1, the 2 and the trailing 0 after the decimal point. The zeros before the 1 only mark the decimal place and do not count.
Are trailing zeros significant?
After a decimal point, yes: 2.50 has three significant figures. In a whole number like 1500 they are ambiguous unless marked, so scientific notation is clearer.
How do I round in a multi-step calculation?
Keep extra digits during the steps and round only the final answer to the least precise measurement. Rounding at every step builds up error.
Is Significant figures calculator free?
Yes. Significant figures calculator on Toolipedia is free to use, with no sign-up and no watermark.
Is it safe to use?
Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.
Does it work on my phone?
Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.
Do I need an account?
No. Just open the page and use the tool. There's no sign-up and no email needed.
Can I put Significant figures calculator on my own website?
Yes. Use the Embed on your site button under the tool to copy a short piece of code and paste it into your page. It is free, needs no account, and the tool keeps working inside your page.