/r/estimation
Ever wondered what the rate of gummi bear combustion needed to power a lawn mower is?
How fast do you need to throw a burrito to make it spontaneously ignite?
A subreddit dedicated to one of the most useful skills in life. Estimation.
This subreddit is dedicated to taking a stab at answering hypothetical, interesting and often untestable questions. In reality, you're never going to get a perfect answer. Some things just can't be tested. That's why estimation is such a valuable skill.
The following types of posts are allowed:
Links to reddit posts related to estimation. Please include the actual estimation in the post title. Example
Requests for estimations as long as they have the [Request] tag in the title. Self posts are preferred. Example
Links to websites related to estimation.
When fulfilling requests
List all assumptions made
Link to sources wherever possible
Use SI units for your final answer
Don't downvote because someone's answer is different. As long as they have made appropriate assumptions and done their calculations correctly, their answer is valid.
Reference dimensions
Wolfram Alpha (Mobile version doesn't have ads)
Length of an everyday car: 4.4 m
Weight of an everyday car: 1300 kg
Length of a football field: 100 m
Volume of an Olympic swimming pool: 2,500 m3
Muzzle velocity of a round fired from a 9 mm Glock 17: 375 m/s or 1,350 km/h
Estimation strategies:
Other related subreddits:
/r/estimation
I want to figure out how loud my car engine is without using any tools like a dB reader.
Assume it is sharp sand from a DIY store.
Hey guys! I recently started my own business offering estimation services for low-voltage projects. Some of my first clients are quite new to the industry and don’t have established vendor relationships to get accurate material quotes. I find it frustrating to create estimates for bids with a low chance of success due to this issue. I’ve been exploring ways to reach out to local vendors or vendors like Anixter, Graybar, and Accu-Tech across different locations to secure the best and most competitive quotes.I have been operating remotely so If anyone has insights or can point me in the right direction, I’d greatly appreciate it. Thanks!
As in people that plan to stay there most of their life, maybe go back to earth after retiring or something.
Bonus question because the above is largely speculation, how much is the total biomass of all ants on earth?
Like if all the water on Earth is temporarily removed and Earth is reshaped into a perfect sphere and then put the water back again, how tall/deep would it be
Occurred to me last night and I guess my gut response is that "people who don't eat pork" is the biggest group, but I'm curious about the hivemind's take.
I've been having a discussion with a friend and he doesn't think they're very big. You can see them in this YT clip for reference.
https://www.youtube.com/watch?v=Gq7cGlGCla8
At the end the one being dropped looks like it hits Hollywood based on the reference point of Griffith Observatory.
I tried to use the nukemap to try and estimate it but I'd like to see if anyone else has a method of approximating it.
Nukemap for reference - https://nuclearsecrecy.com/nukemap/
Clarity in comments
What weight of trash will a typical American generate in a lifetime?
I’m struggling with just coming up with the assumptions, I know the conversions.
But if I know the average lifespan is 78
My assumption couldn’t be how much trash per day an average American weighs right?
Cause then I’d literally only have to multiply it by their lifespan so I feel like I’m oversimplying it
Tried asking this on r/askscience but it got deleted so I'll post it here
So in Invincible, Mark stopped an asteroid from hitting Earth and then Omni Man tells him that was a "small one" and claimed to have stopped an asteroid as big as Texas. But just how powerful would the impact be of an asteroid as big as Nolan claimed?
Construction Estimators, are any of you in here flying solo? If so can you elaborate on the process you took? I.e how did you set up your payment structure, is it hourly? Or per estimate? Advertising, etc. If you don't mind. Background on me, I've been working for a remodeling contractor for 2 years after working in the field for 20 years before that. I've created a great staple pricing database. I've been surpassing my profit margins so I'm looking to maybe fly solo and thought I would maybe start offering third party estimations or something along those lines.
Hi all,
Just wondering if it's worth starting a estimating business, that does take-offs/costings for head contracting commercial companies.
The market in Australia NSW atm seems abit slowed down, but do companies generally outsource any estimating or an in need of a estimator for head-contracting works (i.e public school refurbishment,office fit outs?
What are your thoughts on this?
I was wondering if any one want to sell his rdt account ?
I’d definitely pay you for it!
Let me know if any one interested.
Thanks!
Chatgpt told me it would be roughly 1.3x Earth but with lots of caveats and I just can't trust it.
Seems small...?
Assume that once a bite is taken, the sandwich ceases to exist. Hamburgers and hot dogs don't count. Wraps and gyros do count.
Whenever somebody has a condition with a frequency of less than 1 in a million, we freak out because 1 in a million is like winning the lottery.
But really, the chances of having a condition of frequency less than 1 in a million, has to be much higher than 1 in a million chances. So how likely is it?
So I've been a bit bored, and like any good writer, I decided to dig far too deep into a topic, in this case, space colonization.
So, I wonder what the hypothetical maximum population of the "earth area" could be, that being the Earth, the Moon, and all of the Earth-Moon Lagrange Points.
So, to start with, I think that the most reasonable types of hypothetical space colonies are the Stanford Torus, which has a hypothetical maximum population capacity of around 140,000 people, the Bernal Sphere, which could have a population of about 30,000 people max, and the O'Neill Cylinder, which O'Neil stated could house around 10 million people maximum, but this is debated somewhat. Feel free to use the 10 million figure if you wish, for the sake of simplicity. There are five Lagrange Points in the Earth-Moon system. Here is where I need the math help. I'm not entirely sure how big a Lagrange point is. How many of each type of colony could hypothetically fit inside of one Lagrange point? Could you also set up smaller binary systems of "groups" of colonies at each Lagrange point to increase the number of colonies? Also, O'Neil Cylinders need to have an even number in a group to function properly, so if you're using them for your population figure math, keep that in mind.
Then there's also the moon. I've seen various figures online. Some of them rely on the average area needed for a human being, reaching about 3.8 billion, while another one using different population density metrics, has gotten over a trillion. Feel free to use whatever metric you want, but I think that 3.8 billion is probably the most reasonable.
There also hypothetically could be habitats kept in geosynchronous orbit, but for now, let's leave off those.
Sorry if this is not the proper place for such a silly question.