Mark Rober net worth is not public, but published estimates range from tens of millions of dollars to more than $100 million in 2026. The former NASA engineer built that wealth from one of YouTube’s biggest science channels and CrunchLabs, his profitable STEM toy subscription company. Because both businesses are private, any figure remains an estimate.
Below, we look at where his money comes from, what reporters have found about CrunchLabs and why estimates vary so much.
Mark Rober net worth quick facts
| Field | Information |
|---|---|
| Name | Mark Rober |
| Hometown | Raised in Brea, California |
| Education | BYU (B.S., 2004) and USC (M.S., 2014), mechanical engineering |
| Former job | NASA Jet Propulsion Laboratory engineer for nine years |
| YouTube | More than 80 million subscribers |
| Company | CrunchLabs (co-founded in 2022) |
| Charity campaigns | Team Trees (2019) and Team Seas (2021) |
| Estimated net worth | Not public; estimates range from tens of millions to $100 million+ |
Mark Rober net worth: what we know
No official figure exists for Mark Rober net worth. Still, a few public facts point to a large and growing business. In July 2025, Forbes reported that CrunchLabs had more than 200,000 subscribers and was profitable without outside venture funding. As a result, his company may be worth more than his YouTube channel alone.
You can read more about how we approach figures like this on our How We Estimate Net Worth page.
Sources of Mark Rober net worth
YouTube
Rober posted his first video in 2011 while still working at NASA. Today, his channel has more than 80 million subscribers, and Forbes reported over 1 billion monthly views in 2025. Ad revenue and brand deals on a channel this size can be very large, although he doesn’t publish his earnings.
CrunchLabs
In 2022, he co-founded CrunchLabs, which sells monthly engineering build boxes for kids, such as the Build Box and the Hack Pack for teens. In addition, a 2025 deal with Moose Toys aims to bring CrunchLabs products to store shelves. Subscription revenue is likely one of the biggest parts of his wealth.
Streaming and media deals
His videos have also moved beyond YouTube. For example, a library of his episodes reached Netflix’s global top ten, and his content runs as a 24/7 channel on Samsung’s free streaming service, Net Influencer reported in February 2026.
Mark Rober net worth and career timeline
First, Rober studied mechanical engineering and joined NASA’s Jet Propulsion Laboratory in 2004. There, he spent seven of his nine years working on the Curiosity rover, which now explores Mars. From there, he turned a YouTube hobby into a full media and education business.
Charity work
Rober is also known for large fundraising campaigns. In 2019, he and MrBeast launched Team Trees, which aimed to raise $20 million to plant 20 million trees. Then, in 2021, they launched Team Seas, with a goal of $30 million to remove trash from oceans and rivers, according to Wikipedia. That money went to partner charities, not to Rober.
Why Mark Rober net worth estimates vary
Estimates differ because his two main businesses are private. For example, no one has published his YouTube income, CrunchLabs revenue or his ownership share in the company. Also, a profitable subscription company could be worth far more than its yearly earnings if it were ever sold. For these reasons, any precise figure is an informed guess.
Last updated: October 17, 2026
Mark Rober net worth: final thoughts
In short, Mark Rober net worth isn’t public, but estimates range from tens of millions to more than $100 million. Overall, his wealth comes from YouTube, CrunchLabs and growing media deals. Meanwhile, with CrunchLabs moving into retail stores, his earning power may keep rising. For more profiles like this, browse our Net Worth section.
FAQ
What is Mark Rober’s net worth?
It isn’t public. Published estimates range from tens of millions of dollars to more than $100 million.
Did Mark Rober work at NASA?
Yes. He worked at NASA’s Jet Propulsion Laboratory for nine years, including seven on the Curiosity rover.
What is CrunchLabs?
It is Rober’s company, launched in 2022, that sells monthly engineering build boxes for kids and teens.
How many subscribers does Mark Rober have?
His YouTube channel has more than 80 million subscribers.
Sources
- Forbes, “Mark Rober’s Bold Plan To Reach One Billion Young Minds,” July 2025
- Net Influencer, report on CrunchLabs’ media strategy, February 2026
- Wikipedia, “Mark Rober” and “CrunchLabs”