Unit Converter
Storage, time, length, weight, temperature and speed conversions
Category
Storage base
Drive makers and storage vendors use 1000, while operating systems use 1024 — which is why a "1 TB" drive shows up as 931 GB. Both results are shown so you can pick the right one.
Result
1 GB=1000MB
All units
| Unit | Symbol | Value |
|---|---|---|
| Byte | B | 1000000000 |
| Kilobyte | KB | 1000000 |
| Megabyte | MB | 1000 |
| Gigabyte | GB | 1 |
| Terabyte | TB | 1.00e-3 |
| Petabyte | PB | 1.00e-6 |
Last updated: 2026-10-11
About this tool
The trickiest part of unit conversion is storage capacity: drive makers label capacity in powers of 1000 while operating systems count in powers of 1024 — which is why a "1 TB" drive shows up as 931 GB. This tool shows both results so you can pick the right one instead of guessing. Alongside storage it covers time, length, weight, temperature and speed, and entering one value lists its equivalent across every unit in that category, sparing you from switching back and forth. Conversion runs in your browser and uploads nothing.
Features
Both storage bases
Shows decimal (1 KB = 1000 B) and binary (1 KiB = 1024 B) results together, making clear exactly where the "missing" capacity goes.
All units at once
Enter a value and every unit in the same category is listed in one table, so you never have to switch units repeatedly.
Temperature done properly
Celsius and Fahrenheit are not a simple multiple apart (0°C = 32°F); offsets are handled with the standard formulas.
Six useful categories
Data storage, time, length, weight, temperature and speed cover the vast majority of everyday and development needs.
Adjustable precision
Choose how many decimals to keep, avoiding floating-point noise like 1.0000000000000002.
How to use
- 1
Pick a category
Choose a type such as "Data storage" or "Length".
- 2
Enter a value
Type the number you want to convert.
- 3
Choose units
Set the from and to units; storage also lets you choose decimal or binary.
- 4
Read the result
The result box gives the target value, and the table lists every unit.
Options
- Category
- Determines which units are available.
- Storage base
- Storage only. Decimal counts in 1000s (how drive makers label capacity); binary counts in 1024s (how operating systems report it).
- Decimal places
- How many decimals the result keeps; 2 by default.
Common use cases
- Understanding why a 1 TB drive reports 931 GB
- Turning a byte count from a server into something readable
- Converting inches and pounds from foreign docs into centimetres and kilograms
- Working out how many minutes a 90000 ms timeout actually is
FAQ
Questions you may have about this tool
Why does my 1 TB drive only show 931 GB?
Drive makers label capacity in decimal (1 TB = 1000 × 1000 × 1000 × 1000 bytes) while operating systems count in binary (1 TiB = 1024⁴ bytes). The same physical capacity simply yields a smaller number the second way. This tool lists both so you can compare directly.
What is the difference between KB and KiB?
KB is decimal (1 KB = 1000 bytes) and KiB is binary (1 KiB = 1024 bytes). The IEC introduced KiB/MiB/GiB precisely to remove the ambiguity, though people still often say 1 KB when they mean 1024 bytes.
Are the results exact?
Conversions use standard defined values (such as 1 inch = 2.54 cm), so the maths is exact. Floating-point arithmetic can leave a tiny tail, which is why 2 decimals are shown by default.
Why is temperature handled differently from other categories?
Temperature is a scale with an offset rather than a ratio measured from zero. 0°C equals 32°F, but 0°C is not 0°F, so you cannot just multiply by a factor. The standard formulas are used here.
Are network bandwidth units included?
The speed category includes common rate units. Do be careful to distinguish bps (bits per second) from B/s (bytes per second): bandwidth is usually quoted in Mb/s while download speed is shown in MB/s, a factor of 8 apart.
Does it need an internet connection?
No. The conversion tables are built-in constants, so once the page has loaded it works offline.
Can it convert time zones or currencies?
No. Time zones rely on a rules database that changes with government policy, so use the timestamp converter instead. Currency needs live rates, and a purely local tool could not guarantee freshness, so it is not offered.
Does it record the values I enter?
No. Conversion happens entirely in browser memory; nothing is sent or stored.