Convert megabytes to gigabytes
gigabytes = megabytes × 0.001
One megabyte is 0.001 gigabytes, so multiply by 0.001 to convert. That factor is exact by definition. KB, MB, GB and TB are decimal here: every step is ×1,000, the convention used by drive and phone makers and by macOS. Windows counts in binary units of 1,024 but still writes “GB”, which is why a 1 TB drive shows as 931 GB there.
Convert any value
- Bytes
- 1,000,000 B
- Bits
- 8,000,000 bit
- Kilobytes (KB, 10³)
- 1,000 KB
- Megabytes (MB, 10⁶)
- 1 MB
- Terabytes (TB, 10¹²)
- 0.000001 TB
- Kibibytes (KiB, 2¹⁰)
- 976.5625 KiB
- Mebibytes (MiB, 2²⁰)
- 0.953674 MiB
- Gibibytes (GiB, 2³⁰)
- 0.000931 GiB
- Tebibytes (TiB, 2⁴⁰)
- 0.000001 TiB
- Time to transfer at 100 Mbit/s
- 0.1 secondsBytes × 8 ÷ 100,000,000 — a typical home broadband speed.
Assumptions
- KB/MB/GB/TB are decimal (powers of 1,000); KiB/MiB/GiB/TiB are binary (powers of 1,024).
- A byte is 8 bits.
| Decimal | Bytes | Binary | Bytes | Difference |
|---|---|---|---|---|
| 1 KB (kilobyte) | 1,000 | 1 KiB (kibibyte) | 1,024 | 2.4% |
| 1 MB (megabyte) | 1,000,000 | 1 MiB (mebibyte) | 1,048,576 | 4.9% |
| 1 GB (gigabyte) | 10⁹ | 1 GiB (gibibyte) | 1,073,741,824 | 7.4% |
| 1 TB (terabyte) | 10¹² | 1 TiB (tebibyte) | 1,099,511,627,776 | 10.0% |
| 1 PB (petabyte) | 10¹⁵ | 1 PiB (pebibyte) | 2⁵⁰ | 12.6% |
| Advertised | Bytes | Shown as |
|---|---|---|
| 128 GB | 128,000,000,000 | 119.2 GB |
| 256 GB | 256,000,000,000 | 238.4 GB |
| 512 GB | 512,000,000,000 | 476.8 GB |
| 1 TB | 1,000,000,000,000 | 931.3 GB |
| 2 TB | 2,000,000,000,000 | 1,862.6 GB |
| 4 TB | 4,000,000,000,000 | 3,725.3 GB |
| Approx. size | |
|---|---|
| Plain-text email | 5 KB |
| Smartphone photo (JPEG) | 3–5 MB |
| MP3 song (4 min, 256 kbps) | 8 MB |
| RAW photo | 25–50 MB |
| 1 hour of HD streaming video | 3 GB |
| 1 hour of 4K streaming video | 7 GB |
| Blu-ray movie | 25–50 GB |
| Modern AAA video game | 100–150 GB |
megabytes to gigabytes table
| megabytes | gigabytes |
|---|---|
| 1 megabyte | 0.001 gigabytes |
| 2 megabytes | 0.002 gigabytes |
| 3 megabytes | 0.003 gigabytes |
| 4 megabytes | 0.004 gigabytes |
| 5 megabytes | 0.005 gigabytes |
| 10 megabytes | 0.01 gigabytes |
| 15 megabytes | 0.015 gigabytes |
| 20 megabytes | 0.02 gigabytes |
| 25 megabytes | 0.025 gigabytes |
| 50 megabytes | 0.05 gigabytes |
| 75 megabytes | 0.075 gigabytes |
| 100 megabytes | 0.1 gigabytes |
| 500 megabytes | 0.5 gigabytes |
| 1,000 megabytes | 1 gigabytes |
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1 megabyte = 0.001 gigabytes. Source: https://www.calculateitnow.dev/mb-to-gb