How to Overlay and View Multiple Calendars in Outlook

When you've added shared calendars, internet feeds, or a second account, Outlook lets you see them all together. You can view calendars side by side (each in its own column) or in overlay mode (stacked transparently in a single grid so you can spot free slots fast). This guide explains both, and how they look across new Outlook, the web, and classic desktop.

Side by side vs. overlay

	Side by side	Overlay
Layout	One column per calendar	All calendars merged into one grid
Best for	Comparing schedules in detail	Finding a common free time quickly
Color cues	Each calendar has its own tab/color	Events keep their calendar's color, blended

Both start the same way: turn on the calendars you want by ticking their checkboxes in the left pane.

Choose which calendars are visible

In every version, your calendar list lives in the left pane. Tick a calendar's checkbox to show it, untick to hide it. Each gets a color so you can tell events apart—see How to Categorize and Color-Code in Outlook.

Classic Outlook desktop

Classic desktop has the richest overlay controls.

Side by side

In the Calendar, tick the checkbox for each calendar you want to see.
They open as separate columns across the grid by default.

Overlay mode

With two or more calendars showing side by side, find the small arrow on a calendar's tab (at the top of its column).
Select the arrow to merge that calendar into the one beside it. They now share a single transparent grid.
Select the arrow again to split them back into separate columns.

The active calendar's tab stays on top; click another tab to bring it forward.

New Outlook for Windows and Outlook on the web

New Outlook and Outlook on the web behave similarly.

Tick the calendars you want in the left pane.
By default they overlay in one grid, each event keeping its source calendar's color.
To compare them in separate columns instead, look for the Split view option—often on the calendars themselves or in the view controls at the top right (wording and availability vary by build).

These versions lean toward overlay as the default, so you may not see a dedicated "overlay" button—turning on multiple calendars produces the merged view automatically.

Mobile

The Outlook mobile app merges your visible calendars into one view by colored dots and bars; there's no side-by-side column layout. Tap the calendar menu to toggle individual calendars on or off. For detailed side-by-side comparison, use desktop or the web.

Tips for a readable multi-calendar view

Limit what's on. Showing every calendar at once gets noisy; tick only what you need right now.
Use distinct colors. Assign contrasting colors so overlaid events stay legible—see How to Change Event Colors in Outlook.
Switch views. Day and Work Week make overlays easier to read than a packed Month view.

Troubleshooting

Overlay button missing. New Outlook and the web often overlay automatically—just enable multiple calendars.
Colors clash. Two calendars sharing a color is confusing; recolor one.
A shared calendar won't appear. Confirm it's actually added and ticked—see How to Add a Shared Calendar in Outlook.

If you're lining up calendars from more than one service, nocal merges your Outlook and Google calendars into a single timeline so everything overlays in one place — see how to connect them.