KB to GB Converter

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Enter kilobytes to find decimal gigabytes, then compare the result with the binary GiB value if your source may use 1024-based units.

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How to use our KB to GB Converter

  1. Copy the number from file details, a log, a quota, a spreadsheet, or storage documentation into "Kilobytes (KB)."
  2. Enter a plain number, a decimal, scientific notation, or a number with a KB or kB suffix. Use commas only in thousands groups, such as 1,000,000.
  3. Select "Calculate" to get the decimal gigabytes answer, which is the usual choice for an amount labeled KB or kB.
  4. Read the GiB comparison only if the original source uses 1024-based KiB units, even if its screen loosely says KB.
  5. Sanity-check the source label before using the answer: uppercase B means bytes, while lowercase b means bits and needs a different conversion.
Example inputs for KB to GB Converter
Example inputs for KB to GB Converter

Definitions

KB or kB: A kilobyte written with an uppercase B for bytes. In decimal units, 1 kB equals 1,000 bytes.

GB: A decimal gigabyte. One GB equals 1,000,000 kB.

KiB: A kibibyte, a binary unit equal to 1,024 bytes.

GiB: A gibibyte, a binary unit equal to 1,048,576 KiB.

Bytes and bits: Uppercase B means bytes. Lowercase b means bits, a different and smaller unit.

Decimal and binary prefixes: Decimal prefixes scale by 1,000, while binary prefixes scale by 1,024.

Common mistakes and quick fixes

Mistake: Treating KB and KiB as the same unit.
Fix: Use the decimal GB answer for KB or kB. Use the GiB comparison only when the source amount is actually KiB-based.

Mistake: Entering "kb" with a lowercase b.
Fix: Enter KB or kB for kilobytes. Lowercase b means bits, not bytes.

Mistake: Placing commas incorrectly, such as 1,01.
Fix: Use standard groups such as 1,000 or 1,000,000, or enter the number with no commas.

Mistake: Reading a small nonzero conversion as zero.
Fix: Open "Advanced options" and increase "Result decimal places" to show more digits.

Mistake: Entering a negative storage amount.
Fix: Enter 0 KB or more. File and storage amounts cannot be negative in this converter.

Limitations & Key Assumptions / Boundary Conditions

  • The first answer assumes the entered amount is decimal KB or kB, where 1 GB equals 1,000,000 kB.
  • The GiB card treats the same entered number as KiB. It cannot determine whether a source labeled KB actually intended KiB.
  • This converter accepts byte amounts only. Values labeled kb, Mb, or Gb are bit amounts and need a bit-based conversion.
  • Visible values are rounded to the selected decimal places, while the calculations retain unrounded values.
  • The input must be one finite amount of 0 KB or more. Ranges, formulas, malformed comma grouping, and Infinity are not accepted.

Methodology

Conversion method

The first card uses decimal storage units. The second card answers a separate comparison question by treating the entered count as KiB, which is useful only for a source that uses 1024-based units.

decimal GB = entered KB / 1,000,000

binary GiB = entered count as KiB / 1,048,576

Decimal prefixes scale by powers of 1,000. Binary prefixes scale by powers of 1,024.

Worked example

Enter 1,000,000 KB. The decimal calculation is 1,000,000 / 1,000,000 = 1.000000000 GB. If the same count is interpreted as KiB, 1,000,000 / 1,048,576 = 0.953674316 GiB when displayed to 9 decimal places.

Calculation details

The calculator accepts a finite nonnegative number, normal comma grouping, scientific notation, and a KB or kB suffix. It rejects lowercase kb because lowercase b means bits. Changing "Result decimal places" changes displayed rounding only, not the underlying conversion.