Unit Converter

How to use Unit Converter

1. Open Unit Converter in your browser — it loads instantly and works offline once cached.
2. Enter your values in the input fields. Every field is labelled so you know exactly what to type.
3. The result updates automatically as you type — there is no "submit" round-trip to a server.
4. Adjust any input to compare scenarios and see how the outcome changes in real time.
5. Copy or note the result. Nothing you enter is stored or sent anywhere.

Why use Unit Converter?

• 100% free with no limits, no sign-up and no watermarks.
• Private by design — your data are processed in your browser and never uploaded to a server.
• Fast and lightweight, with instant results even on a phone or a slow connection.
• Works everywhere — any modern browser on Windows, macOS, Linux, Android or iOS.
• Part of a full unit conversion suite, so related unit tasks are one click away.

What people use Unit Converter for

• Converting between metric and imperial units for a recipe or a project.
• Handling length, weight, volume, area or speed conversions in one place.
• Checking a measurement quoted in unfamiliar units.

Unit Converter: limits and things worth knowing

• Fluid ounces differ between systems: a US fluid ounce is about 29.57 ml and a UK one about 28.41 ml, and a US pint is 16 fl oz against the UK's 20. Recipes crossing the Atlantic go wrong here more than anywhere else.
• A US gallon is 3.785 litres and an imperial gallon 4.546 — a 20% difference that matters for fuel economy figures.
• Weight and mass are distinct quantities, and pounds are used for both in everyday speech. This matters in physics and rarely elsewhere.
• Temperature converts with an offset rather than a simple ratio, which is why it behaves unlike every other conversion here.

Is it private and secure?

Your privacy is built in. Unit Converter runs completely on your device, so whatever you enter stays in your browser and is never transmitted, logged or stored on any server.

Network activity: none. Nothing is sent and nothing is fetched. This tool makes no network request at all once the page has loaded — which is why it keeps working if your connection drops.

You do not have to take that on trust — our privacy proof page publishes the Content-Security-Policy that enforces it, lists every third party it permits, and shows how to verify the whole claim yourself.

Learn more

Why Browser-Based Tools Are Safer for Your Files — Most online converters upload your files to a server. Client-side tools don't. Here's why that difference matters for privacy.