Gmail almost full? Here’s exactly what to clear.
Move the slider to your current Gmail usage. We’ll show how many emails — and which categories — to delete to hit each storage milestone.
Step 1
How full is your Gmail?
Check at one.google.com/storage if you’re not sure.
Step 2 — What to delete to hit each milestone
Get to 10 GB
Breathing room · free up 3.0 GBAny one of these alone reclaims the full 3.0 GB:
716
Heavy threads
35,791
Promotions
46,018
Social
26,844
Updates
Get to 5 GB
Comfortably clean · free up 8.0 GBAny one of these alone reclaims the full 8.0 GB:
1,909
Heavy threads
95,444
Promotions
122,713
Social
71,583
Updates
Where Gmail storage actually goes.
Your free 15 GB is shared across Gmail, Drive, and Photos. For most people, Gmail is the biggest culprit — and most of that is attachments, not text. A few useful numbers:
- The average text-only email is ~75 KB. With one attachment, jump to 3–5 MB. Cleaning
has:attachment larger:5Mis the single highest-leverage search you can run. - Promotions are noisy but small. Cleaning 10,000 promo emails frees roughly 0.75 GB. Useful, but attachments win the size game.
- Deletes don’t reclaim space until you empty Trash and Spam. Both auto-purge after 30 days, or empty them manually from the left sidebar.
Don’t fight storage every quarter.
One setup, then it runs in the background forever.
Stay under the cap
Set MailSweeper to auto-delete Promotions, Social, and Updates older than a window you choose. Your storage gauge stops creeping up.
Target the big stuff first
We surface the heaviest senders and threads so you know where the storage is actually going — not just where the count is highest.
Skip the Google upgrade
Most MailSweeper users free up enough space to stay on the free 15 GB tier indefinitely instead of paying for Google One.
Common questions.
- How do I know what's taking up my Gmail storage?
- Run `has:attachment larger:10M` in Gmail search to find the biggest offenders. The widget above estimates the breakdown across Promotions, Social, Updates, and attachments based on typical Gmail composition.
- Does deleting emails immediately free up storage?
- No — deleted emails sit in Trash for 30 days and still count against your quota. Empty Trash (and Spam) from the left sidebar to reclaim space instantly. MailSweeper does this on a schedule automatically.
- What's the fastest way to free up the most space?
- Attachments. A single thread with a few PDFs can be larger than a thousand promotional emails. Search `has:attachment larger:5M older_than:1y` and delete in bulk for the biggest immediate win.
- Will I lose anything important?
- Mail Sweeper never touches starred, important, or primary inbox emails. You choose which categories are eligible, and we hold them in a Dustpan label for 7 days before permanent deletion as a safety net.
More free Gmail tools.
Pair these together for a full inbox reset.
