Add a free, ready-made calculator to your website, blog or class page by pasting a few lines of code. No sign-up, no cookies, and the calculators run in your visitor’s browser.
Last updated: October 2026
Weight of steel, aluminum, copper and other metal bars, plates, tubes and angles. Open the full page.
Gallons or litres of paint for a room, with doors, windows, coats and ceiling. Open the full page.
Gallons or litres in a rectangular, round, oval or kidney pool, with fill time. Open the full page.
Teachers, bloggers, hardware shops and DIY sites often want a calculator their visitors can use without leaving the page. Copy the code for any calculator below and paste it into your page. It works on any site that accepts an iframe, including WordPress, Wix, Blogger and plain HTML.
Looking for the standalone versions? See the Metal Weight, Paint and Pool Volume calculators.
Are the widgets free? Yes. You can place any of them on your website, blog or classroom page at no cost. The only request is to keep the small “Calculator by Figuro.net” link under the widget.
Do the widgets collect visitor data? No. The embedded calculators run entirely in the visitor's browser, do not use cookies or analytics, and do not send what visitors type to any server.
Will it fit my page? The widget adapts to the width of its container, and the snippet resizes the frame automatically so there are no inner scrollbars.
Can I change the colours or size? You can change the width and maximum width in the code. The calculator itself keeps a light theme so it stays readable on any site.
Can I request another calculator as a widget? Yes. Use the contact page to tell us which calculator you would like next.