How Much Does the Earth Cost?

how much does the earth cost

How Much Does the Earth Cost?

Key Points

  • Earth is valued at $5 quadrillion, according to astrophysicist Greg Laughlin’s calculations.
  • Laughlin’s formula considers a planet’s primary star, apparent visual magnitude, and habitability.
  • The value of Earth’s resources, such as minerals, fossil fuels, and forests, contribute to its overall cost.

Have you ever wondered how much would it cost to buy the world? As humans, we often take Earth’s resources for granted, but astrophysicists stopped to consider the actual cost of our world. So, what if we told you Earth is valued at $5,000,000,000,000,000?

In other words, the Earth costs five quadrillion dollars. That’s a massive number, and you might be wondering where it originated. Let’s explore the true cost of Earth, considering its natural resources, the impact of human activities, and the importance of sustainable practices.

Who Estimated Earth’s Value?

Back in 2009, NASA launched the Kepler spacecraft from Cape Canaveral to begin its three-and-a-half-year planet-hunting mission. The main goal was to find Earth-like planets.

Greg Laughlin was an assistant astronomy and astrophysics professor at the University of California, Santa Cruz, at the time, and is now an astronomy professor at Yale. And he was “completely invigorated” by the mission.

So, he did what any brilliant space geek does (as a family of engineers and NASA alumni, we use the term “geek” with love!) and calculated the costs of terrestrial planets and exoplanets. Next, he shared his formula on his blog.

And then, in a somewhat tongue-in-cheek gesture, he offered a one-of-five limited edition Oklo baseball cap to the first person or team discovering a terrestrial exoplanet, valued over one million USD, using his formula.

Of course, mainstream media didn’t take long to pick up his blog post and share his thoughts about how much the Earth costs. Using his own formula, Laughlin valued Earth’s cost at $5 quadrillion, approximately one hundred times the Earth’s GDP at the time.

How Did Astrophysists Determine Earth’s Price?

Using Laughlin’s formula to determine the cost of exoplanets found by the Keppler mission, the astrophysicist took into account a newly-found planet’s primary star (or the Sun) and its apparent visual magnitude. As a result, he determined that Kepler’s highest-value planetary finds could have around 30 million dollar valuations.

Greg Laughlin’s formula considers variables like the planet’s size, mass, temperature, age, and geographical resources.

©Negro Elkha/Shutterstock.com

He also accounted for a planet’s habitability in the equation. And those with a lower potential for life got lower marks. Another estimation had the spacecraft finding approximately 100 planets during its 600 million USD mission. So, those numbers factor into his equation, as well.

Applying his math to Mars gave Laughlin a valuation of $13,988, which he said was mainly because of the Sun’s apparent magnitude. But that still made it a hundred times more valuable than the highest-valued extrasolar planet in 2009. Gliese 581c earned a tiny value of only $158.32.

Importance of Understanding How Much the Earth Costs

Of course, there are other ways of estimating how much the Earth costs beyond a dollar value.

The Value of Earth’s Resources

Earth is rich in valuable resources like minerals, fossil fuels, and forests. These resources provide us with essentials like metals for building, energy for power, and timber for construction. So, the mere cost of felled trees, for example, doesn’t suggest the potential valuation of wood used in homes, buildings, furniture, and decking.

However, sustainable management of these resources is essential to maintaining their value and ensuring their availability for future generations.

Environmental and Cultural Valuations

Another exciting thing to consider is the environmental and cultural valuations of how much the Earth costs. In Stuart L. Pimm’s article, The Value of Everything, he discusses the differences between an economist’s view and an ecologist’s.

For example, he compares the whaling of yesteryear, when fishermen went out with harpoons, to today’s whaling. He says today’s boats go out with loads of camera-laden tourists rather than harpoons to capture the whales digitally or on film. And, as Pimm says, the cultural value of whales far exceeds the price of their meat or oils.

rare earth minerals
Pimm notes that value is a subjective notion, as it varies both on a personal and generational level.


Pimm surmised that the price of boat tickets alone outweighed the sale price of a whale’s meat and oils. But, then, you must consider the whale’s environmental impact on its surroundings.

For example, whales help maintain the abundance of other marine life, some of which may include commercially valuable fisheries.

Looking at how climate change or polluted waters might impact oceans and whales helps humans see where our activities could alter environmental and cultural valuations, thus affecting how much the Earth costs.

Embracing Sustainable Practices

Adopting more sustainable practices helps mitigate the costs associated with Earth’s resources. This means using resources responsibly, reducing waste, and embracing renewable energy sources.

In addition, conservation efforts, such as recycling, reusing, and reducing our consumption, can significantly affect environmental and cultural valuations.

Final Thoughts: How Much Would It Cost to Buy the World?

According to astrophysicist and astronomer Greg Laughlin, the Earth cost five quadrillion USD. It’s an interesting take on the monetary value of our home planet. However, ecologists say Earth’s actual cost goes beyond a dollar amount to include the environmental and cultural valuations.

Ecologists believe that we can contribute to a stronger planet for future generations by adopting sustainable practices, advocating for environmental protection, and spreading awareness.

How Much Does the Earth Cost? FAQs (Frequently Asked Questions) 

What is a world price?

The world price of a service or good is how much it costs in a country other than your own. For example, in international trade, countries export goods having a lower local price than their higher shipped world price. By the same token, countries import goods when the world price is lower than the local cost.

How much does it cost to name or buy a star?

Several different star registry companies exist with differing fee structures. But you can name a star for $20 to $150.

What is the highest-priced item in the world?

The International Space Station costs around $150 billion to design and build. And now it costs about $3.1 billion annually for operations.

What is the Diamond Planet worth?

The Diamond Planet is formally named 55 Cancri e and is not made only of diamonds. But it has a potential worth of $26.9 nonillion. That equals $26.9 with 30 zeros. However, if the diamonds were harvested, we’d have a glutted market, bringing the price down.

How much are humans worth?

Economists on NPR’s Planet Money say a single human life is worth about $10 million. And that’s because there are cost-benefit tests for federal safety regulations over $100 million annually. So, in order to do a cost analysis, economists had to identify human worth in dollars.

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