We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What is G-Force?

Michael Anissimov
Updated May 21, 2024
Our promise to you
All The Science is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At All The Science, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

G-force refers to either the force of gravity on a particular celestial body or the force of acceleration anywhere. It is measured in g's, where 1 g equals the force of gravity at the Earth's surface (9.8 meters per second per second). As Einstein realized, the force of gravity and the forces of acceleration are mutually indistinguishable on the subject; a person in an opaque box experiencing a g-force would be unable to tell whether its origin lies in acceleration through space or a gravitational field, unless he had some way of seeing outside the box. The analysis of this force is important in a variety of scientific and engineering fields, especially planetary science, astrophysics, rocket science, and the engineering of various machines such as fighter jets, race cars, and large engines.

Humans can tolerate localized g-forces in the 100s of g's for a split second, such as a slap to the face. Sustained forces above about 10 g can be deadly or lead to permanent injury, however, although there is considerable variation among individuals when it comes to their tolerance. Race car drivers have survived instantaneous accelerations of up to 214 g during accidents. In rocket sled experiments designed to test the effects of high acceleration on the human body, Colonel John Stapp in 1954 experienced 46.2 g for several seconds. Usually, accelerations beyond 100 g, even if momentary, are fatal.

In everyday life, humans experience g-forces stronger than 1 g. A typical cough produces a momentary force of 3.5 g, while a sneeze results in about 3 g of acceleration. Roller coasters are usually designed not to exceed 3 g, although a few notable exceptions produce as much as 6.7 g. Slight increases are experienced in any moving machinery, such as cars, trains, planes, and elevators. Astronauts in orbit experience 0 g, called weightlessness.

G-force varies on different planets or celestial bodies. When an object has a greater mass, it produces a higher gravitational field, resulting in higher g-forces. On the Moon, it's about 1/6 g, and on Mars, about 1/3 g. On the Martian satellite Deimos, only 8 miles (13 km) in diameter, the gravity is about 4/10,000ths of a g. In contrast, the surface of Jupiter experiences about 2.5 g. This is smaller than it seems it should be because Jupiter's low density causes its surface to be very far from its primary concentration of mass at the core. On the surface of a neutron star, a degenerate star with a density similar to the atomic nucleus, the surface gravity is between 2×1011 and 3×1012 g's.

All The Science is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Michael Anissimov
By Michael Anissimov
Michael Anissimov is a dedicated All The Science contributor and brings his expertise in paleontology, physics, biology, astronomy, chemistry, and futurism to his articles. An avid blogger, Michael is deeply passionate about stem cell research, regenerative medicine, and life extension therapies. His professional experience includes work with the Methuselah Foundation, Singularity Institute for Artificial Intelligence, and Lifeboat Foundation, further showcasing his commitment to scientific advancement.
Discussion Comments
By anon340838 — On Jul 06, 2013

@anon302147: The object would move off at a tangent (straight line) to the circle it is moving in. However it would curve down towards the ground.

The acceleration can be dynamically resolved into two directions, horizontally (X) and vertically (Y).

Horizontal velocity would fall due to air resistance, but if it was in a vacuum it would continue to move with a constant velocity in the X direction.

Vertical velocity & acceleration would be caused by gravity, acceleration of its mass times acceleration due to gravity (m x 9.81m/s) minus the air resistance would give the force, then convert that back to velocity using newtons laws.

By anon302147 — On Nov 07, 2012

If you were to drop an item in a centrifuge producing 9 gs what would happen to the item? Would it just fall like normal?

By anon284810 — On Aug 12, 2012

Quick question: What is the G of an object that just passed through a tunnel through the center of the Earth? If falling at 1 G, when getting the the surface at the other side, is it 1, 2 or zero G?

By anon260406 — On Apr 10, 2012

Does 'G' vary with the height or does it remain the same at all altitudes?

By anon164232 — On Mar 30, 2011

If an astronaut in a space vehicle is in space outside of the gravitational field of any space mass, is it possible for the astronaut to "accelerate" with suffering a "g force"?

By anon112652 — On Sep 21, 2010

Can anyone guide me how to get a display g- force of a revolving object at a speed of approx. 150 Rpm

By anon108539 — On Sep 03, 2010

What is the maximum g force on an object dropped from zero height? The object's total weight is suspended at no height and dropped/ I have been told the answer is two Gs.

By anon59105 — On Jan 06, 2010

i think it's a very good article, you know.

By anon58448 — On Jan 02, 2010

g force, i would suppose, has to do with inertia exerted by gravity. As gravity pulls and/or pushes an object the inertia is sometimes so intense that blood flow from the body cannot overcome its ability to push blood to the brain and other organs. it taxes the heart to over come the initial pulling of sudden g forces multiplied by speed of force.

By anon47774 — On Oct 07, 2009

I think I need more specific details about the g-force.

By anon34632 — On Jun 25, 2009

@nicktals4: It is simply 1. It is accelerating from gravity itself.

By nicktals4 — On May 08, 2009

I would like to know how to calculate the G force of a box weighing 18 lbs when it fall from 3 feet.

In Gs.

By anon12715 — On May 12, 2008

Hello i would like to convert g-force to lbs of impact force and mph, is this possible? would be great to find news about g-force in relation to cornering forces and collision analysis! for example how dangerous and hard is a strike/hits of 40 g?

P.S. force is mass x acceleration so lbs x g-force?

thanks for help!

Michael Anissimov
Michael Anissimov
Michael Anissimov is a dedicated All The Science contributor and brings his expertise in paleontology, physics, biology...
Learn more
All The Science, in your inbox

Our latest articles, guides, and more, delivered daily.

All The Science, in your inbox

Our latest articles, guides, and more, delivered daily.