How Much Would It Cost To Buy the Earth?


Embark on a cosmic journey through the vastness of space with our beloved Earth, the third jewel in our solar system’s crown. If we imagine a whimsical scenario in which extraterrestrial beings contemplate purchasing this blue gem, a fascinating thought experiment emerges — what is the Earth truly worth? Although the true value of Earth can’t be determined, experts have playfully assigned the planet a price tag in the ballpark of a mind-boggling $5 quadrillion, unveiling Earth as a prized entity in the cosmic real estate market.

Our beloved Earth, spinning through the vastness of space for billions of years, holds a special place as the third planet in the solar system we call home. Nestled between the fiery Venus and the enigmatic Mars, Earth is unique among the other solar system planets in its ability to sustain a wide variety of life. But what if extraterrestrial beings, intrigued by this blue gem, sought to buy our planet? Could humans even put a price tag on Earth? And if we could, just how much would it be worth?

How much is the Earth worth?

Nature, with its treasures of water, land, and wildlife, holds such a special place in our hearts that putting a price on the Earth seems beyond calculation. That said, according to astrophysicist Greg Laughlin, if humans were to consider selling the Earth to a hypothetical alien race, its price tag would be around a mind-boggling $5 quadrillion.

Delving into various factors and variables, Laughlin’s published studies propose that our residence is not just any planet; it’s one of the most extravagantly valued ones in the cosmic real estate market.

Greg Laughlin’s Earth valuation formula is an interesting method used to estimate the monetary value of planet Earth. Laughlin, an astrophysicist, developed this formula by considering factors such as the planet’s size, temperature, age, and the presence of a moon, which are essential for supporting life.

Greg Laughlin’s planet valuation formula

Greg Laughlin didn’t mean to provide a serious method for interstellar planet valuation, but he did get the ball rolling with a formula that gets us thinking about the variable at play. Here is a simplified version of his formula.


  • is the value of the planet (in dollars).
  • is the planet’s mass relative to Earth.
  • is the flux, or energy received from the star it orbits, relative to what Earth receives from the Sun.
  • is the density of elements heavier than helium (since heavier elements are essential for life as we know it).
  • is the age of the planet (older planets are more likely to have developed life).
  • is the distance of the planet from its star, with the ideal distance being in the habitable zone where liquid water can exist.
  • is the presence of a moon, which can stabilize a planet’s tilt and therefore its climate.
  • is the planet’s radius, with a larger radius potentially indicating a stronger gravitational pull, which could affect the planet’s ability to retain an atmosphere.

Applying this formula to Earth, Laughlin estimated Earth’s value to be around 5 quadrillion dollars. This theoretical value is more of a thought experiment rather than a practical appraisal. It’s used to stimulate thinking about the uniqueness and preciousness of our planet, especially in discussions about space exploration and exoplanet studies.

The simplified calculator below allows you to play with Laughlin’s formula to see how other planets would compare with the Earth.

Planet Value Calculator

Planet Value Calculator

Could anyone own or sell the Earth?

The Earth is, in essence, priceless and thus cannot be owned. The invaluable resources it offers, such as land and water, are not commodities for sale. The Earth is not private property, and any attempt to buy or sell the entire planet would infringe upon the rights of all its inhabitants, both human and other living beings. It serves as a shared home for all, emphasizing the importance of responsible stewardship and collaboration to preserve its beauty and resources for generations to come.

Understanding the value of the Earth

Earth’s natural capital represents the cumulative wealth of the planet’s natural resources, encompassing essential elements such as water, air, soils, and living organisms. This reservoir of resources operates dynamically to furnish a wide array of goods and services known as ecosystem services. Think of it as nature’s way of offering a suite of invaluable products and services crucial to sustaining life on our planet.

The well-being of humanity is intricately linked to the health of ecosystems and the effective functioning of ecosystem services. Take, for instance, the contributions of aquatic and forest ecosystems, which provide crucial services such as purifying air, pollinating crops, and supplying clean drinking water. These services play a pivotal role in enhancing the overall quality of life on Earth.

Ecosystem services

Recognizing the value of natural capital and ecosystem services is key to securing essential benefits for humanity and maintaining a sustainable environment. This understanding not only ensures the continued provision of vital services but also sheds light on nature’s fundamental role in promoting the well-being of human beings, offering valuable insights for countries to navigate the delicate balance between human needs and environmental health.

The Earth’s ecosystem services can be categorized into four major types: provisioning, regulatory, supporting, and cultural.

  • Provisioning services ensure a steady supply of natural products like food, water, soil, and medicinal plants. Agroecosystems, for instance, enable the cultivation of food for human consumption, while biodiversity contributes to medicinal plant resources.
  • Regulatory services maintain the balance of the natural world, filtering pollutants, preserving air and water quality, recycling waste, moderating climates, and providing natural pest and disease control.
  • Supporting services, as the name suggests, support provisioning and regulatory services. These include soil formation, photosynthesis, and habitat provision, fostering species diversity essential for regulatory and provisioning services.
  • Cultural ecosystem services encompass the benefits derived from human interaction with nature, including recreational activities like fishing, hunting, and ecotourism.

Robert Constanza valuation of the Earth as a service provider

Robert Costanza and his colleagues made a significant contribution to the field of ecological economics with their 1997 paper published in the journal Nature, where they attempted to estimate the value of the world’s ecosystem services and natural capital. This study was groundbreaking in its approach to quantifying the instrumental value of ecosystems – essentially, the value of the services provided by nature to humanity.

Estimation of value

The paper estimated the value of the world’s ecosystem services and natural capital to be in the range of $16 to $54 trillion per year, with an average of around $33 trillion per year. This figure was groundbreaking at the time and substantially higher than the global gross national product.

Instrumental value

The valuation was based on the instrumental value of ecosystems, which refers to the utility or usefulness of nature to humans. This includes services like water purification, air quality regulation, soil fertility, pollination, and climate regulation, among others.


To arrive at this valuation, Costanza and his team used a range of data sources and valuation methods, combining them in an innovative way. They included direct market values where applicable (like the cost of water purification) and estimated values for services that do not have a market price (like the value of biodiversity).

Significance for policy and conservation

By putting a monetary value on ecosystem services, the study aimed to highlight the economic importance of preserving biodiversity and natural habitats. The approach was particularly strategic in communicating the value of ecosystems to policymakers and stakeholders who are often more responsive to economic arguments than to moral or ethical ones.

Controversies and limitations

The paper sparked debate and controversy, particularly regarding the methods used for valuation. Critics pointed out that the economic valuation of nature could be reductive, overlooking non-economic values of nature, such as intrinsic or moral values.

Moral and Ethical dimensions

Costanza and colleagues acknowledged that ecosystems have moral and ethical values beyond their economic utility. They argued that moral values are indeed important but noted the challenges in integrating these values into policy and decision-making processes, which are often dominated by economic considerations.

Impact on environmental economics

This paper was a seminal work in the field of environmental economics, leading to increased awareness of the economic benefits of conservation and sustainable use of natural resources. It also spurred further research in the valuation of ecosystem services.


How much does the Earth cost in British pounds?

If we use the estimate of Earth’s value by astrophysicist Greg Laughlin and assume an exchange rate of around 1 USD to 0.81 GBP, then the Earth’s cost in pounds would be roughly £4.05 quadrillion.

How much of the Earth can we use?

Pinpointing exactly how much of the Earth’s resources we can use is a difficult task. While there is only a finite amount of resources available, ultimately, the goal is to achieve a balance where human activities are in harmony with the Earth’s natural regenerative systems. This requires mindful and sustainable practices in resource use, conservation efforts, and global cooperation to address environmental challenges.

How much does the Earth weigh?

The Earth is estimated to weigh roughly 588 quintillion tons, or about 6 sextillion kilograms.

How much is the planet Mars worth?

Mars has been valued at $16,000 ($0 if you use Greg Laughlin’s formula), but its practicality is limited. Notably, purchasing Martian land isn’t legal, as the Outer Space Treaty of 1967 prohibits selling or buying land on Mars.

Key takeaways

  • Earth is an invaluable gem in the solar system, boasting unique characteristics such as life-supporting features.
  • In the hypothetical scenario of putting a price tag on Earth, astrophysicist Greg Laughlin has estimated a staggering value of $5 quadrillion.
  • The Earth is shared among all its inhabitants, meaning the Earth’s resources, such as land and water, are not commodities for sale, underlining the need for responsible stewardship.
  • Earth’s natural capital, encompassing resources like water, air, soils, and living organisms, fuels ecosystem services crucial for human well-being.
  • Ecosystem services are classified into four major types—provisioning, regulatory, supporting, and cultural. These services range from food production to recreational activities.
View Article Sources
  1. Greg Laughlin’s Formula – Oklo
  2. The Value of the World’s Ecosystem – Nature (Oak Ridge National Laboratory)
  3. How Much Does It Cost to Build a Duplex House (2023 Update) – SuperMoney
  4. What Is The Cost To Build an A-Frame House In 2023? – SuperMoney
  5. How Much Does it Cost to Charge a Tesla? – SuperMoney
  6. How Much Does a Helicopter Cost? – SuperMoney
  7. The value of ecosystem services – Oxford Scholarship Online