Convert between bits and bytes — KB, MB, GB, TB, PB — with decimal (SI) precision, exact arithmetic, fully local.
The data size converter translates storage quantities between the units real products use: Bit, Byte, KB, MB, GB, TB, and PB. Type a value, pick the source and target units, and the tool returns the exact equivalent — 5 GB is 5000 MB, 1.5 TB is 1500000000 KB, 1 byte is 8 bits. The converter uses the decimal (SI) convention throughout: 1 KB equals 1,000 bytes, 1 MB equals 1,000 KB, and so on. That is the convention hard drives and network equipment are rated in — a "1 TB" drive is 1 trillion bytes — and it is the one that matches the prefixes printed on the box. The alternative binary convention (1 KiB = 1,024 bytes) exists and the tool does not silently mix the two: the page says clearly which convention it uses, so a converted number is never ambiguous after the fact. Arithmetic runs on exact decimal math rather than floating point, so conversions like 1048576 bytes to KB come out as precisely 1048.576, never a rounded guess. Values may be fractional, and results are shown with up to ten significant digits — enough for honest precision without trailing-zero noise. Everything is computed in your browser; nothing you enter is uploaded, logged, or stored. Use this tool when a storage quota is quoted in TB and your code measures in bytes, when you are estimating bandwidth (megabits versus megabytes is a classic eight-fold error), or when you need to communicate a size in the unit your audience actually reads.
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Converted
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Decimal (SI) convention throughout: 1 KB = 1,000 bytes, 1 MB = 1,000 KB — the convention storage vendors use. Binary units (KiB, MiB) are deliberately not mixed in.
Your hosting plan advertises 5 GB of storage but the API reports usage in bytes. Converting 5 GB to bytes: 5 × 1000³ = 5,000,000,000 bytes — the decimal convention, matching the provider’s own figure. The converter gives the same number in one step.
| Input | Value |
|---|---|
| value | 5 |
| fromUnit | GB |
| toUnit | Byte |
| Result | 5000000000 |
converted = value × 1000^(fromExp − toExp)
| Symbol | Meaning |
|---|---|
fromExp, toExp | unit exponents: Bit = −3, Byte = 0, KB = 1, MB = 2, GB = 3, TB = 4, PB = 5 (relative to bytes) |
1000 | the decimal factor between adjacent units (1 KB = 1,000 bytes) |
The Bit exponent is −3 because 1 byte = 8 bits (2³). All arithmetic is exact decimal, never floating point.
Last reviewed August 11, 2026 · Version 1.0.0 · Toolivaro does not guarantee external content.
Decimal (SI): 1 KB = 1,000 bytes, 1 MB = 1,000 KB. This is the convention used by hard-drive and network vendors — a 1 TB drive is 1 trillion bytes. The binary convention (1 KiB = 1,024 bytes) is a different system and this tool never mixes the two.
Because the tool follows the SI prefixes, where kilo means 1000. The 1024-based numbers are officially called KiB, MiB, and GiB. Many tools mix conventions silently; this one states its convention on the page so your result is never ambiguous.
Eight bits make one byte. Converting from Bit to Byte divides by 8 — 1 Bit is 0.125 Byte — and converting from Byte to Bit multiplies by 8, so 1 Byte is 8 bits.
Yes. Values may be fractional and are converted with exact decimal arithmetic — 1.5 GB is exactly 1500 MB, not a rounded approximation.
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