How to Show Week Numbers in Google Calendar (2026)
Week numbers (the ISO count of the week within the year, 1 through 52 or 53) are useful for project planning, sprint scheduling, and teams in Europe where “week 32” is everyday shorthand. Google Calendar can display them, but the setting is tucked into the view options and is desktop-only.
This guide covers enabling week numbers on the desktop web version — the only place the option exists — and explains the mobile limitation so you’re not hunting for a switch that isn’t there.
1. Open Google Calendar Settings
- Open Google Calendar in a browser
- Click the Settings gear icon in the top-right corner
- Choose Settings from the menu
This opens the full settings page, not the quick view menu.
2. Go to View Options
- In the left menu, under the General section, click View options
- You’ll see a list of display toggles — including weekends, declined events, and week numbers
3. Enable Show Week Numbers
- Check the box labeled Show week numbers
- The setting saves automatically — there’s no Save button
That’s it. Navigate back to your calendar (click the back arrow or the Google Calendar logo) to see the change.
4. Where Week Numbers Appear
Once enabled, week numbers don’t show everywhere — they appear in the places where a week-of-year label makes sense:
- Mini month picker (the small calendar in the top-left sidebar): a number sits to the left of each week row
- Year view: each month shows week numbers down the side
- Month view: week numbers appear along the left edge of each week
In Day and Week views the numbers are not shown, since you’re already focused on a single week. Use the mini calendar in the sidebar to read the current week number while in those views.
Google Calendar uses the ISO 8601 standard: week 1 is the week containing the first Thursday of the year, and weeks start on Monday. This is why your week number may differ from a “week starts on Sunday” count.
5. Week Numbers on Mobile (Android and iPhone)
The Google Calendar mobile apps do not have a Show week numbers option. There’s no toggle in Settings → General on either Android or iPhone, and the number doesn’t appear in any mobile view.
Workarounds if you need week numbers on the go:
- Open Google Calendar in your phone’s browser and request the desktop site — the desktop web setting (and the numbers) will display, though the layout is cramped
- Glance at the desktop sidebar before you leave your computer; the ISO week number is the same everywhere
- The web setting you enable on desktop does not sync to the mobile apps, because the apps have no place to show it
Quick Reference
| Question | Answer |
|---|---|
| Where is the setting? | Settings → General → View options → Show week numbers |
| Does it save automatically? | Yes, no Save button |
| Which views show numbers? | Mini month picker, Year view, Month view |
| Day/Week view? | No number shown (check the sidebar) |
| Mobile apps? | Not available — desktop web only |
| Which standard? | ISO 8601 (week starts Monday, week 1 = first Thursday) |
Troubleshooting
I enabled it but don’t see any numbers.
You’re probably in Day or Week view, which don’t show week numbers. Switch to Month or Year view, or read the number from the mini calendar in the top-left sidebar.
The week number looks one off from what I expected.
Google Calendar uses ISO 8601, where week 1 is the week containing the year’s first Thursday and weeks start on Monday. A “Sunday-start” or “first-full-week” count will sometimes differ by one.
There’s no Show week numbers option in my mobile app.
The mobile apps don’t support week numbers at all. Open Google Calendar in a mobile browser with desktop site mode, or check on a computer.
I turned it on at work but it’s gone on my home computer.
The setting is tied to your Google account and should sync across browsers where you’re signed in. If it didn’t, hard-refresh (Ctrl+Shift+R), confirm you’re in the same account, and re-check the box under View options.
Week numbers disappeared from my month view.
Confirm Show week numbers is still checked under Settings → General → View options — a shared computer or a different signed-in account can have it off.
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More on Google Calendar: How to manage multiple Google Calendars · How to color-code your Google Calendar · How to share your Google Calendar · How to set your working hours · How to block time on Google Calendar · How to create a new Google Calendar
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