How it works
- Enter your total open tabs, then mark the tabs that are heavier than ordinary pages.
- The calculator applies visible per-tab memory estimates for standard pages, web apps, heavy apps, video tabs, extensions, and Chrome's baseline.
- Toggle Memory Saver to estimate background discarded tabs (tabs Chrome unloads from memory but keeps in your tab strip) at 10% of their normal memory class.
- Use the copy button to save the estimate or compare before and after closing a saved tab group.
Why Chrome tab memory estimates vary so much
A Chrome tab is not one fixed unit of memory. A quiet documentation page might sit near the idle/simple range, while a design canvas, workspace app, spreadsheet, or video call can be several times heavier. Extensions also add memory, but they usually apply once to the browser profile rather than once per tab. That is why a plain count like "25 tabs" can mean a manageable session or a laptop that feels stuck in mud.
This calculator is deliberately transparent about its assumptions. It uses 120 MB for ordinary pages, 200 MB for feed-style web apps, 300 MB for video tabs, 600 MB for heavy apps, 50 MB per extension, and a 300 MB Chrome baseline. Those are estimates, not telemetry from your device. To measure the real session, use Chrome Task Manager with Shift + Esc.
Chrome Memory Saver can help when tabs are truly inactive and eligible for discarding. The catch is that a tab still sitting in your tab strip may reload later, keep visual clutter around, and sometimes stay active because it is playing media, holding a form, or connected to a device. Snapshotting a group, closing it, and restoring it later is the cleaner comparison when you want RAM back immediately.