Sources & methodology
Formulas and conversion factors in this section follow:
1 tool
Data Size Converter
Convert bytes, KB, MB, GB, and TB.
Storage marketing, operating systems, and download speeds do not all agree on what a gigabyte is. Drive manufacturers use decimal units (1 GB = 1,000,000,000 bytes), while many operating systems report binary units (1 GiB = 1,073,741,824 bytes) — which is why a 1 TB drive shows as roughly 931 GB.
This converter lets you move between byte multiples and explains which convention applies, so you can estimate how many photos fit on a card, how long a download will take, or how much cloud storage a backup needs.
All data size converter
Pick a tool to see the calculator, formula, worked example, and FAQs.
Explore other categories
More free tools across health, finance, math, and unit conversion.
7 tools
Universal Converters
Any unit → any unit: length, weight, time, and more.
12 tools
Health & Fitness
BMI, macros, protein, pace, sleep, and more.
8 tools
Length Converters
Popular length pairs including feet ↔ cm.
6 tools
Weight Converters
Popular weight pairs like kg ↔ lbs.
4 tools
Temperature Converters
Celsius, Fahrenheit, Kelvin shortcuts.
5 tools
Time Converters
Seconds ↔ HH:MM:SS and other time shortcuts.
2 tools
Speed Converters
km/h ↔ mph shortcuts.
4 tools
Volume Converters
Liters, gallons, cups shortcuts.
3 tools
Area Converters
m², ft², acres shortcuts.
4 tools
Science Units
Pressure, energy, power, and angles.
1 tools
Cooking & Baking
Ingredient cup ↔ gram style conversions.
8 tools
Finance
Tips, discounts, EMI, tax, salary, interest.
11 tools
Everyday Math
Percentages, age, GPA, averages, and more.