GB to KB Converter
Quick answer: To convert GB to KB, multiply by 1,000,000. For example, 10 GB is 10,000,000 kB. One gigabyte equals 1,000,000 kB.
- Calculator
- Formula
- Examples
- Size compared
- About the units
- Where used
- Step by step
- Popular conversions
- Reading your result
- Mistakes
- FAQ
- Related tools
- Method
Use the GB to KB Converter
GB to KB formula and what each symbol means
kB = GB × 1,000,000
| Symbol | Meaning |
|---|---|
| GB | Gigabyte |
| kB | Kilobyte |
GB to KB examples
1 GB
1 GB × 1,000,000 = 1,000,000 kB.
10 GB
10 GB × 1,000,000 = 10,000,000 kB.
100 GB
100 GB × 1,000,000 = 100,000,000 kB.
GB compared with KB
One GB is 1,000,000 times as large as one kB, so your number gets bigger when you convert GB to KB and smaller when you convert back. If the answer is not larger than what you typed, you divided instead of multiplying.
About GB and KB
Gigabyte (GB): 10⁹ bytes. Kilobyte (kB): 1,000 bytes (SI prefix).
Where GB to KB conversions are used
Drive, phone and cloud-storage sizes are given in gigabytes or terabytes, while operating systems may show gibibytes. File sizes for email, uploads and downloads are quoted in kilobytes and megabytes.
How to calculate GB to KB step by step
- Enter the value in GB (the starting unit).
- Multiply by 1,000,000, because 1 GB = 1,000,000 kB.
- The product is the value in kB. To go back, divide by 1,000,000 or multiply by 0.000001.
Popular data storage conversions
How to read your GB to KB result
Storage vendors use decimal prefixes (1 GB = 1,000,000,000 bytes), while many operating systems report binary values (1 GiB = 1,073,741,824 bytes), which is why a 500 GB drive can show about 465 GiB.
| GB | KB |
|---|---|
| 1 | 1,000,000 |
| 2 | 2,000,000 |
| 5 | 5,000,000 |
| 10 | 10,000,000 |
| 20 | 20,000,000 |
| 50 | 50,000,000 |
| 100 | 100,000,000 |
| 1,000 | 1,000,000,000 |
KB to GB: quick table
| KB | GB |
|---|---|
| 1 | 0.000001 |
| 5 | 0.000005 |
| 10 | 0.00001 |
| 25 | 0.000025 |
| 50 | 0.00005 |
| 100 | 0.0001 |
| 250 | 0.00025 |
| 500 | 0.0005 |
Common mistakes when calculating GB to KB
- Treating 1 KB as 1,024 bytes: under the SI/IEC convention 1 kB is 1,000 bytes and 1 KiB is 1,024.
- Dividing when you should multiply: from GB to kB multiply by 1,000,000; from kB to GB divide by 1,000,000.
GB to KB FAQ
How many kB are in 1 GB?
1 GB equals 1,000,000 kB.
How many GB are in 1 kB?
1 kB equals 0.000001 GB.
Is 1 GB = 1,000,000 kB an exact conversion?
Yes. The gigabyte and the kilobyte are both defined exactly in SI terms, so the ratio has no measurement uncertainty; 1,000,000 is just that ratio shown to 7 significant figures.
What is a gigabyte (GB)?
10⁹ bytes.
How can I estimate GB to KB in my head?
One GB is 1,000,000 times as large as one kB, so your number gets bigger when you convert GB to KB and smaller when you convert back. If the answer is not larger than what you typed, you divided instead of multiplying.
What is 30 GB in KB?
30 GB = 30,000,000 kB (since 30 × 1,000,000).
What is 150 GB in KB?
150 GB = 150,000,000 kB (since 150 × 1,000,000).
What is 0.5 GB in KB?
0.5 GB = 500,000 kB (since 0.5 × 1,000,000).
How many decimals should I keep when converting GB to kB?
Match the precision of your original measurement. For example, 10,000,000 kB rounds to 10,000,000 kB at 3 significant figures; keep more digits only for engineering or scientific work.
More in Data Storage converters
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Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST: prefixes for binary multiples, NIST SP 811, Appendix B.8: conversion factors