Measurement units help you position Google Slides objects consistently. They are useful when a diagram must follow a spacing specification or when a team works with familiar physical dimensions. Changing units is different from changing the slide’s proportions or making an image higher resolution.
Choose a preferred unit
On a computer, open Tools > Preferences. Enable Use measurement unit preferences and choose the offered unit, such as inches, centimeters, or pixels. Google’s current help describes these preferences for rulers and objects in Slides.
You can also click the ruler, point to Change units, and choose a unit there. The ruler menu includes a reset to the presentation’s default, which is based on its locale.
Use the values consistently
Select an object and inspect its size and position through Format > Format options. Compare the displayed unit with your specification before entering numbers. A value copied from a centimeter-based design should not be entered as though it were inches.
For custom slide dimensions, use the separate File > Page setup dialog. Its available unit choices are not a reason to assume every control elsewhere uses an identical list.
Verify the physical relationship
Check object spacing and alignment on the canvas after applying values. Confirm that the slide itself has not been unintentionally resized. Rehearse or export the result at the intended dimensions. Unit preferences make measurements easier to interpret; they do not guarantee that a printer, projector, or downstream application will reproduce physical size without its own scaling settings.
References
- Change slide size & measurement units in Google Slides
- Insert and arrange text, shapes, diagrams, and lines
Reviewed against the linked official product guidance on November 3, 2026. Features, limits, screen labels, and access can vary by account, platform, region, and organization policy.