Free unit converter widget for your website

Build a free unit converter, customise the colour, theme and size, and embed it on your website in under a minute. No sign-up, no code to write.

Why embed a converter?

When a visitor needs to convert a measurement, they don’t want to leave your page to google it. An embedded converter lets them do it right there - they stay longer, your site feels more professional and the page is more useful. And it costs you nothing.

Perfect for

• Recipe & food blogs – let readers switch between dl, ml, cups and tablespoons.
• DIY & construction – inches to mm, square metres, timber sizes.
• Fitness & running – miles to km, min/km to km/h, pace.
• Travel – Fahrenheit to Celsius, miles, feet and more.
• E-commerce – sizes and weights right on the product page.
• School & education – a simple, accurate tool for students.

How it works

1. Pick a category and units above.
2. Customise the theme, accent colour, background and size to match your site.
3. Copy the code.
4. Paste it wherever you want the converter - done!

Features

• Fast & lightweight – loads in a cached iframe and won’t slow your page down.
• Responsive – looks great on mobile and desktop.
• Light & dark theme – follows your site automatically, or pick one.
• Custom accent, background and border – match your design.
• Always accurate – we handle the conversions; you never update anything.
• Completely free – no account required.