Data Speed Converter

How to use Data Speed Converter

1. Open Data Speed 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 Data Speed 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 data speed tasks are one click away.

What people use Data Speed Converter for

• Converting between megabits and megabytes to understand a connection speed.
• Estimating download time for a file at a given speed.
• Comparing an advertised broadband speed against observed throughput.

Data Speed Converter: limits and things worth knowing

• Connection speeds are quoted in bits per second and file sizes in bytes. Divide by 8: a 100 Mbps connection transfers at most about 12.5 MB per second, which is why downloads look slower than the advertised figure.
• Decimal and binary prefixes differ. A manufacturer's 1 TB drive is 10^12 bytes, while the operating system may report 2^40 bytes, showing about 931 GB — the disk is not missing anything.
• Real throughput is lower than the line rate because of protocol overhead, typically 5-10% for TCP/IP.
• Advertised broadband speeds are usually 'up to' figures measured to the exchange, not to any particular server.

Is it private and secure?

Your privacy is built in. Data Speed 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.