Understanding your result
The main answer and comparison table describe one unchanged quantity of data using different unit definitions. A capital B means byte. The word bit is used explicitly to avoid confusing it with a byte. Fractional results are allowed as mathematical quantities, although a stored file contains a whole number of bytes.
After converting used and total capacity to the same storage unit, use the Percentage Calculator in ratio mode to express the used amount as a percentage of the total.
The formula
Decimal prefixes advance by powers of 1,000: kB, MB, GB, and TB. Binary prefixes advance by powers of 1,024: KiB, MiB, GiB, and TiB. Consequently, 1 GB is 1,000,000,000 bytes while 1 GiB is 1,073,741,824 bytes.
One GiB expressed as GB
Enter 1 and select GiB as From and GB as To. The result is 1.073741824 GB. The byte quantity remains 1,073,741,824; only its presentation changes.
How to use this calculator
- Check whether the source label means bits or bytes.
- Select the exact decimal or binary prefix printed with the quantity.
- Choose the target unit and calculate; compare the byte row if two displays disagree.
Different labels can describe the same capacity
A drive label and a software display can use different prefix conventions. A smaller numeric count in a larger binary unit does not by itself mean that data or physical storage disappeared. Compare both quantities in bytes before drawing that conclusion.
Usable space can still differ because of formatting, partitions, reserved areas, or system files. This converter explains unit sizes only and does not inspect a device or estimate those overheads.
Storage amounts and transfer rates are different
An amount such as MB is not a rate such as megabits per second. To estimate a transfer duration, convert the amount and rate to matching bit or byte units and then divide amount by rate. Real transfers can include protocol overhead and pauses.
The table supports amounts through TiB and TB as source or target units. Display values are rounded to twelve significant digits, so extremely large conversions are estimates in their displayed last digits rather than exact file-size accounting.
Assumptions & limitations
What this calculation assumes
- One byte contains eight bits.
- Decimal and binary prefix meanings follow the unit explicitly selected.
What to keep in mind
- The converter does not measure files, available disk capacity, or network performance.
- Rounded outputs should not replace exact integer byte counts in storage allocation or billing.
Common questions
Is KB the same as KiB?
An ambiguous KB label must be checked in its original context. This tool uses kB for exactly 1,000 bytes and KiB for exactly 1,024 bytes.
Why is a byte eight times a bit?
The byte definition used here is eight bits, so dividing a bit count by eight gives the equivalent bytes.
Can I convert Mbps directly to MB?
No. Mbps includes time while MB is an amount. A duration is needed to relate a transfer rate to an amount of data.