iCloud Storage Plan Estimator
Updated .
This estimator sizes your iCloud storage tier from what you actually store, then adds two years of growth and 20% headroom, because outgrowing a plan is how backups silently stop. It reports a tier by size rather than by price, since iCloud+ pricing differs by country and changes — check the current price in your region before subscribing.
How it works
The estimator sizes for two years ahead rather than today, because a plan that exactly fits your current library is already too small — and the failure is silent. When iCloud fills, backups stop completing and iOS does not insist you notice. Sizing for today is how people end up with a five-month-old backup they believed was current.
The steps: add your four stored categories to get today's figure; add twenty-four months of growth at your stated monthly rate; for a family, add 70% of your own footprint for each additional member, since other people typically store less than the person who set the plan up; then add 20% headroom and choose the smallest tier that fits.
Tiers are the published iCloud sizes: 5 GB free, 50 GB, 200 GB, 2 TB, 6 TB and 12 TB. The tool deliberately reports a size and not a price: iCloud+ pricing varies by country and changes over time, and a figure printed on a page is exactly the kind of thing that quietly becomes wrong.
One important caveat: turning on Optimise iPhone Storage does not reduce what iCloud holds. It reduces what the device holds while full-resolution originals stay in iCloud. The two are separate problems and are often confused.
Worked example
A single person with 58 GB of photos, 9 GB of device backups, 6 GB of iCloud Drive files and 2 GB of mail. Their library grew about 14 GB last year, so roughly 1.2 GB a month.
Today: 75 GB. Two years of growth adds 28.8 GB, giving 103.8 GB. No family members, so that stands. Adding 20% headroom gives about 124.6 GB, which does not fit 50 GB and does fit 200 GB — leaving roughly 96 GB spare at that tier.
The result is worth reading against the alternative. Sizing on today's 75 GB would also point at 200 GB, so in this case the growth allowance changes nothing — but with 140 GB stored today, sizing for now would fit 200 GB while sizing for two years would not, and the difference is a plan that quietly fills in month fourteen.
Add three family members to the same inputs and the requirement rises to about 322 GB, which exceeds 200 GB and lands on the 2 TB tier. That jump is why it is worth running the estimator before setting up Family Sharing rather than after, when everyone's backups have already started failing.
Frequently asked questions
How much iCloud storage do I actually need?
Size for two years ahead rather than today, adding roughly 20% headroom, because a plan that exactly fits your current library fills quickly and backups then stop silently. This estimator does that arithmetic from your own figures.
Does Optimise iPhone Storage reduce my iCloud usage?
No. It reduces what the device stores while the full-resolution originals stay in iCloud, so it solves a device storage problem rather than an iCloud one. The two are frequently confused.
How is a family plan sized?
The estimator adds 70% of your own footprint for each additional family member, on the basis that other people typically store less than whoever set the plan up. Adjust upward if another member also has a large photo library.
Why does this tool not show prices?
Because iCloud+ pricing differs by country and changes over time, and a price printed on a page becomes wrong without anyone noticing. The tier size is the durable answer; check the current price for your region.
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