File Size Calculator
Convert file size units and estimate transfer time from download or upload speed. Useful for storage, media, and data planning.
KB 1,500,000
MB 1,500
GB 1.5
TB 0.0015
Mbps
Estimated Time 5m 28s
Frequently Asked Questions
- File size is usually measured in bytes and converted into KB, MB, GB, or TB. A file size calculator helps convert between units and estimate download or upload time.
- MB usually refers to decimal megabytes (1,000,000 bytes), while MiB refers to binary mebibytes (1,048,576 bytes). Many consumer tools use decimal-style labels for simplicity.
- A rough estimate is time = file size / transfer speed. Just make sure the file size and speed use compatible units.
- In decimal units, 1 GB = 1,000 MB. In binary units, 1 GiB = 1,024 MiB.
- Different systems and apps may use decimal or binary unit conventions, so the same file can appear with slightly different numbers.
- Yes. It is useful for estimating storage needs, upload limits, transfer times, and approximate media file sizes.
- That depends on context. A large image might be tens of MB, while a large video file might be several GB or more.
- Yes. Compression reduces the number of bits needed to store the same information, often shrinking the file significantly.