The laptops, dubbed "Chromebooks", are unusual in that they do not come with a traditional hard-drive and are designed simply to be a gateway to the internet.
Google says users can still work, listening to music, watch videos and much more by storing their data in "the cloud" — in other words, the company's servers.
"Everything can be saved to the web since it has more space than any computer," says one ad for the computers.
The search giant first announced its plan to build an operating system based on the Chrome web browser two years ago.
Samsung and Acer are making the first Chromebooks to go on sale in the US and six other countries on June 15.
A Google spokesperson said an Asia-Pacific launch was planned for later this year.
Acer's Chromebook, at $US349, will have an 11.6" screen display and up to 6 hours of battery life.
Samsung's version, selling for $US429 to $US499, will have a 12.1" screen and up to 8.5 hours of battery life. It also comes with 3G as standard for mobile web browsing.
Both models will have keyboards, but no traditional hard-drives for storage. They will come with 16 gigabytes of flash memory — the kind found in smartphones, tablet computers and some iPods.
They also have slots to plug in other storages device you buy separately.
With Michael Liedtke in San Francisco for AP