Convert Terabytes to Gigabytes

To convert terabytes (TB) to gigabytes (GB), multiply the TB value by 1,000.

• Formula: GB = TB × 1,000
• Key idea: 1 TB = 1,000 GB (so terabyte is larger than gigabyte)

Example:

• 2.5 TB × 1,000 = 2,500 GB

How many gigabytes are in a terabyte?

In most computer storage, 1 terabyte (TB) equals 1,024 gigabytes (GB). This uses the base-2 system (binary) that many operating systems use for file sizes.

Some brands also use a base-10 system where 1 TB equals 1,000 GB. This can make a drive look smaller in your computer.

Is 1 TB equal to 1,000 GB or 1,024 GB?

Both can be correct, based on the standard used:

• Decimal (base-10): 1 TB = 1,000 GB
• Binary (base-2): 1 TB = 1,024 GB

Storage makers often use 1,000, while many computers report sizes closer to 1,024.

What is the difference between TB and TiB?

TB is usually a decimal unit, while TiB is a binary unit:

• 1 TB = 1,000 GB
• 1 TiB = 1,024 GiB

If you want a strict binary label, TiB (tebibyte) is the clearer unit.

Why does my 1 TB drive show less than 1 TB on my computer?

A few things cause this:

• Drive makers often label 1 TB as 1,000,000,000,000 bytes.
• Many systems display storage using binary units, where 1 TB shows as about 0.91 TiB.
• Formatting and system files also take up some space.

As a result, a “1 TB” drive may show around 931 GB in some views.

How do I convert terabytes to gigabytes?

Use one of these formulas:

• Binary conversion: GB = TB × 1,024
• Decimal conversion: GB = TB × 1,000

Pick the one that matches how your device or label reports storage.

How many gigabytes are in 2 TB, 4 TB, or 10 TB?

Here are common conversions using the binary standard (1 TB = 1,024 GB):

• 2 TB = 2,048 GB
• 4 TB = 4,096 GB
• 10 TB = 10,240 GB

Using the decimal standard (1 TB = 1,000 GB):

• 2 TB = 2,000 GB
• 4 TB = 4,000 GB
• 10 TB = 10,000 GB

How many gigabytes is 0.5 TB?

Using the binary standard:

• 0.5 TB = 512 GB

Using the decimal standard:

• 0.5 TB = 500 GB

Which is bigger, a terabyte or a gigabyte?

A terabyte is bigger than a gigabyte.

• 1 TB = 1,024 GB (common binary use)
• 1 TB = 1,000 GB (decimal labeling)

Are terabytes and gigabytes used for internet data too?

Yes. Data plans and internet usage often use GB and TB. Many providers use decimal units, so 1 TB may mean 1,000 GB on a bill or plan.

Your device may still show data sizes in a different way, so totals can look slightly off.

Does converting TB to GB change the actual data size?

No. The data stays the same. Only the unit and reporting standard changes. The same file can show a different size depending on whether a system uses 1,000 or 1,024 as the base.

What’s the easiest way to avoid confusion when converting TB to GB?

Use the same standard across your comparison:

• Comparing drive labels and plan limits often fits 1 TB = 1,000 GB
• Comparing what your computer reports often fits 1 TB = 1,024 GB

If you’re checking free space, stick to what your device uses for display.