Storage Calculator
Deciding between 256GB and 512GB? Enter how you use your phone and see what actually fits.
About the Storage Calculator
How much actually fits in 128GB, 256GB or 1TB? This calculator turns storage into real things: photos, 4K video minutes, songs, apps and games, so you can choose the right iPhone, iPad or Mac storage tier before you pay for it.
How to use it
- 1 Pick a storage size or type your own.
- 2 Adjust how you shoot and store: photo size, video resolution, music quality.
- 3 See how much of each fits, and where the space goes.
Frequently asked questions
Why is my 256GB iPhone not 256GB free?+
The operating system, preinstalled apps and formatting take a share, and manufacturers count a gigabyte differently from the system. Expect roughly 10 to 15 percent less usable space.
How much space does 4K video use?+
About 375MB per minute at 4K 60fps in the efficient format, and several times more in ProRes. An hour of ProRes can pass 100GB on its own.
Is 128GB enough in 2026?+
For light shooters who stream music and use iCloud Photos, yes. If you film 4K often or keep big games, 256GB is the safer tier.
