File Size Converter: Convert KB, MB, GB, TB Online | Free

A Accurate conversion between SI (decimal, e.g., GB) and IEC (binary, e.g., GiB) units is crucial for server and cloud management to avoid capacity miscalculations. Cloud providers often quote in SI units, while operating systems and applications display in IEC. Using a reliable file size converter ensures you provision the correct storage, prevent unexpected "out of space" errors, and optimize costs by understanding exact capacity differences.

A You can input the capacity of a floppy disk, like 1.44 MB, and see its exact byte equivalent. For example, 1.44 MB is 1,509,949,440 bytes. This tool helps you visualize those old storage limits against modern file sizes. It’s a fun way to see how much storage has evolved. Just enter '1.44' into the MB field and hit convert.

A Absolutely. This converter handles raw data units, so you can manually calculate bitrates by dividing file size by duration. For example, a 1.5 GB video that's 2 hours long has a bitrate around 1.7 Mbps. Just convert 1.5 GB to megabits (12,000 Mb), then divide by 7,200 seconds. Internet speeds are measured in bits per second, so converting byte-based file sizes to bits helps you estimate download times. Try converting 500 MB to megabits (4,000 Mb) at a 50 Mbps connection for an 80-second download.

A Yes, this converter fits video workflows perfectly. DaVinci Resolve or Premiere Pro often display project sizes in MB or GB, but export settings might ask for kilobits per second. Try converting a 4.2 GB render to MB: you get 4,200 MB. That clarity helps you guess if it'll fit a 32 GB SD card before exporting. For bitrate math, convert your file to bits first — 1 GB equals 8,000 Mb. Then divide by your video length in seconds. It saves a lot of trial and error.

A That's a classic gotcha. Internet plans advertise speeds in megabits per second (Mbps), but file sizes show in megabytes (MB). One byte equals 8 bits, so a 100 Mbps connection actually downloads at 12.5 MB/s max. Try it here: convert 100 megabits to megabytes. You'll get 12.5 MB. Misunderstanding this makes you think your connection is 8 times slower than it really is. Quick trick: divide any Mbps number by 8 for the real-world MB/s speed.

A Yes, it does — up to exabytes for SI and exbibytes for IEC. Scientists working with genome sequencing or large-scale climate models need those higher units. Enter 3.2 PB into the petabyte field, and you'll see it as 3,200,000 GB. That's useful when comparing cloud storage tiers. Just don't try fitting that on your laptop.

A Websites typically display file sizes in SI units (MB, GB) where 1 MB equals 1,000,000 bytes. Your browser or operating system often reports in binary units (MiB, GiB) where 1 MiB equals 1,048,576 bytes. That "100 MB" download might show as 95.4 MiB locally. Try converting 100 MB to MiB here — you'll see the exact difference. Always check which standard the source uses before panicking about a missing 4.6 MiB.

A Yes, and it matters if you're optimizing for page speed. A kilobyte (KB) is 1,000 bytes, while a kibibyte (KiB) is 1,024 bytes. Using our converter, a 500 KB image target becomes 488 KiB — that's a 2.4% difference. Compression tools often stick to SI units, but your image editor might show binary. That gap can push you over a hosting limit without you realizing it. When aiming for a 100 KB file, always set your compressor to 97.7 KiB just to be safe.

A People care more than you'd think, especially when buying storage. A gigabyte (GB) is 1,000,000,000 bytes, while a gibibyte (GiB) is 1,073,741,824 bytes. That 7.4% gap means a "1 TB" drive sold in SI units actually gives you about 931 GiB when Windows counts it. Run 1 GB through this converter and you'll see 0.93 GiB staring back. Hard drive manufacturers use SI because bigger numbers look better. Operating systems default to IEC because they work in powers of two. Neither is lying, but you should know which one you're looking at before you panic about missing space.

A Paste 1,073,741,824 bytes into the input and you'll see it expressed as 1.07 GB in SI or exactly 1 GiB in IEC. The tool detects your numeric entry and shows both standards side-by-side, so you don't pick incorrectly. If you're debugging a server error message that shows raw bytes, this feature is a lifesaver. Quick tip: count the digits first—9 digits means under a GB, 10 digits means you're in GB territory. That mental shortcut catches most mistakes before you convert.