Who Is Mark Rober? The Ex-NASA Engineer and What’s Known About His Wealth

Mark Rober went from NASA engineering to one of YouTube's biggest science channels and the CrunchLabs kit business. Forbes estimates his yearly creator earnings, but no outlet has published his net worth. Here is what the record shows.

Mark Rober is a former NASA engineer who makes high-budget science videos on YouTube and runs CrunchLabs, a company that mails engineering kits to kids. No publication that ranks fortunes has put a number on Mark Rober net worth as of October 2026, so this profile sticks to what is on the record: Forbes’ earnings estimate, the size of CrunchLabs, and his charity work.

Where it stands: In October 2026, Tubefilter reported that YouTube and Google.org are giving $2.5 million in grant funding to Class CrunchLabs, Rober’s free science curriculum for schools.

Quick facts

Item Detail
Name Mark Rober
Known for Engineering and science YouTube videos
Age 46 (Forbes, 2026)
Company CrunchLabs (STEM kit subscriptions)
Forbes creator earnings $30M (2026 list, No. 9)
Net worth figure None published by Forbes or Bloomberg

Who is Mark Rober?

He is an engineer turned entertainer whose videos teach physics through stunts. His own company’s website introduces him as a “NASA engineer for the Curiosity Mars Rover,” and Forbes calls him a former NASA engineer.

The videos are expensive to make. Forbes says a crew of about 100 people makes each of his seven-figure-budget episodes, with topics running from building a roller coaster to a robotics lesson with Cristiano Ronaldo.

From NASA to a YouTube studio

Rober’s path ran from engineering into video, and then into a product company. The order matters for his finances: the channel built the audience that the kits are now sold to.

  • Engineering. He worked as a NASA engineer on the Curiosity Mars rover, per CrunchLabs.
  • YouTube. Experiments and stunt builds became the channel’s signature, drawing sponsors that, Forbes says, include Rivian, Google and Disney.
  • CrunchLabs. A subscription kit business built on the channel’s audience.
  • Television. Jimmy Kimmel let him guest host his late-night show in 2022, and the two made a pair of Discovery shows in 2023, Tubefilter reported. In 2025, Tubefilter reported a Netflix deal for a kids and family competition series co-produced by CrunchLabs and Jimmy Kimmel’s company, Kimmelot.
  • Education. Forbes reported that in spring 2026 he gave a TED talk on revitalizing STEM teaching.

How Mark Rober makes money

His income comes from three documented streams: YouTube and brand partnerships, CrunchLabs product sales, and television. Forbes tracks the combined total, and in its 2026 Top Creators list estimated his earnings at $30M, ranking him ninth.

That is an earnings estimate for one year. Net worth works differently: it totals assets, subtracts liabilities, and is pinned to a date. A high income year says little about how much has been saved, invested or spent.

Netflix appears to help the product side. Netflix co-CEO Ted Sarandos said of Rober: “What he saw was a big increase in his consumer product sales after this first week on Netflix,” Tubefilter reported in March 2026, adding that Sarandos did not offer specific numbers.

CrunchLabs: the business behind the channel

CrunchLabs sells engineering toys by subscription, and its flagship is the Build Box. The company describes it as a STEM subscription for kids ages 8-13 and says on its product page: “We’ve shipped millions of boxes to hundreds of thousands of happy families.” Revenue and profit have not been disclosed, and we found no reported funding round or outside valuation.

The company’s ownership has not been published either, so there is no documented stake to describe. Alongside the Build Box, Rober’s own pitch on the CrunchLabs site lists the Hack Pack and a newer Creative Kit.

Mark Rober net worth: what the estimates say

No wealth ranking, whether Forbes’ lists, Bloomberg’s index or the Sunday Times Rich List, includes him. Forbes publishes his yearly creator earnings, which measure income only, and CrunchLabs is private, with no disclosed revenue or valuation.

One documented number shows the scale of what he can commit. Tubefilter reported that Rober committed $55 million to Class CrunchLabs, a free curriculum for third through eighth grades with videos planned in 34 languages. That is a spending pledge, not a measure of his wealth, and the reports did not say how it is funded.

Peers in this series face the same gap between visible earnings and unpublished wealth; see our profiles of MrBeast and Marques Brownlee.

Team Trees, Team Seas and Team Water

Rober’s most visible charity work is with MrBeast. According to Tubefilter, the pair raised $20 million for #TeamTrees in 2019 to plant 20 million trees.

They followed in October 2021 with #TeamSeas, which aimed to raise $30 million to remove 30 million pounds of trash. Tubefilter reported in 2024 that the campaign raised more than $33 million from donors in over 200 countries and territories and had cleaned up more than 34 million pounds of trash. Their 2025 campaign, #TeamWater, set a $40 million goal for clean-water projects.

These drives are fundraising for nonprofits, not income for the hosts. Tubefilter reported that once #TeamSeas had its money, it partnered with two nonprofits, Ocean Conservancy and The Ocean Cleanup, to carry out the cleanups. The creators’ contribution was the audience and the videos that drove donations.

Recent news

The education push is now the headline, and as reported it is free to schools rather than a product. Class CrunchLabs launched for the 2026-27 school year with YouTube as its distribution partner, and the YouTube and Google.org grant announced in October 2026 is meant to fund translations and keep the lessons free. Rober has not said the curriculum will be sold; the plan, as reported, is to give it to teachers at no charge.

Frequently Asked Questions

What is Mark Rober’s net worth?

Nobody reputable has put one in print. Forbes did rank his creator earnings at $30M for 2026, but that is one year of income, not total wealth.

Is Mark Rober a millionaire?

No outlet has published a net worth estimate, so there is no sourced answer. Documented facts point to a large business: Forbes credits him with $30M in 2026 creator earnings, and Tubefilter reported he committed $55 million to his free Class CrunchLabs curriculum.

Did Mark Rober work at NASA?

Yes. CrunchLabs describes its founder as a NASA engineer for the Curiosity Mars Rover, and Forbes calls him a former NASA engineer.

How old is Mark Rober?

Forbes lists his age as 46 on its 2026 Top Creators profile.

What does CrunchLabs sell?

Engineering kits sold by subscription. The Build Box is aimed at kids ages 8-13; the company also lists the Hack Pack and a Creative Kit, and says it has shipped millions of boxes.

Sources

Net worth figures are estimates published by the outlets named, on the dates shown. They are not disclosed by the people profiled, they move with markets and private valuations, and different publications reach different numbers. Net Worth Rankings is not affiliated with anyone profiled here.