Convert between all digital storage units from bits to petabytes in real time. Also calculates file transfer times for a given file size and connection speed.
Open Bit & Byte Calculator → free, no sign-inDigital storage units are genuinely confusing: bits, bytes, kilobytes, megabytes, gigabytes, terabytes — and the difference between kilobytes (1000 bytes) and kibibytes (1024 bytes) catches people out all the time. The Bit & Byte Calculator converts instantly between all of them, and also calculates file transfer times given a connection speed — useful any time you're estimating how long a download or upload will take.
System administrators sizing storage, developers estimating payload sizes, anyone trying to understand their broadband speed in practical terms, or students learning about data representation — the real-time conversion makes the relationships between units immediately clear.
No tutorials. No learning curve. Open it and get started.
No server uploads. File transfer time calculations account for real-world efficiency — not just raw theoretical bandwidth.
Completely free. No trial period. No premium tier for basic functionality. No account required. Use it as often as you need.
One job, done well. Bit & Byte Calculator was built to solve a specific problem cleanly. No feature bloat, no ads, no distractions.
What's the difference between MB and MiB?
MB (megabyte) = 1,000,000 bytes (decimal/SI). MiB (mebibyte) = 1,048,576 bytes (binary/IEC). Operating systems often use MB to mean MiB, which causes confusion.
Why does my 1TB hard drive show less storage?
Manufacturers use decimal prefixes (1TB = 1,000,000,000,000 bytes) while operating systems often display in binary (1TiB = 1,099,511,627,776 bytes).
How is transfer time calculated?
File size in bits divided by connection speed in bits per second, with a real-world efficiency factor applied.
Does it support very large values?
Yes — values up to petabyte scale are supported.
What units are included?
Bits, bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes in both decimal and binary prefixes.
Free. Instant. No sign-in. Open it and get the job done.
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