# How do you convert Terabytes to Gigabytes?

According to **the International System of Units** (SI), one terabyte consists of 1000 gigabytes which also means that 1 TB = 10^{3} GB in base 10. According to binary system which computers use, one terabyte consists of 1024 gigabytes. That also means 1 TB = 2^{10} GB in base 2. 1 **Gigabyte** is also equivalent to 1,000,000,000 bytes or 1000^{3} bytes in the International System of Units (SI). On the other hand, 1 Terabyte is equal to 1,000,000,000,000 bytes or 1000^{4} bytes in SI and base 10 (decimal). If we are talking about the binary system that computers use, 1 Gigabyte is equal to 2^{30} bytes or 1024^{3} bytes or 1,073,741,824 bytes. And 1 Terabyte is 2^{40} bytes or 1024^{4} bytes or 1,099,511,627,776 bytes.

As you can see there are 1,099,511,627,776 bytes in one terabyte in binary system. And 1 gigabyte consists of 1,073,741,824 bytes. If you divide 1,099,511,627,776 bytes by 1,073,741,824 bytes, you will get 1,024 gigabytes. That means one terabyte is equal to 1,024 gigabytes in base 2.

We know that there are 1,000,000,000,000 bytes in one terabyte in base 10 (SI). And 1 gigabyte consists of 1,000,000,000 bytes. If you divide 1,000,000,000,000 bytes by 1,000,000,000, you will get 1,000 gigabytes. That means one terabyte is equal to 1,000 gigabytes in decimal system.

You can use our online and user-friendly tool to convert terabytes to gigabytes for both base 10 (decimal) and base 2 (binary).