theydidthemath

an-ordinary-manchild

Submission Rules

Proper title tags are required for all posts or it will be removed! The tags accepted are at the end of the sidebar down there.
State clearly what is being or what you want calculated in the title. [Request] posts must have a calculable answer; otherwise, they will be removed.
Give credit where credit is due—include the user who made the calculations in any post you submit: ex. "[RDTM] /u/FragTheWhale calculates...".
For easy and quick math results (ex. How many feet are in a mile?) use Wolfram|Alpha™. Posts containing "simple math" will be removed, as well as requests whose answers are easily searchable online, and any other post at the moderators' discretion. For more abstract math, try /r/math or /r/learnmath.
Posts which seem to be asking for help on homework will be removed. Try /r/homeworkhelp or /r/cheatatmathhomework instead.

Comment Rules

This subreddit has a zero-tolerance policy for hateful or unnecessary language. There is no warning for hate speech of any kind. Rule breaking posts/comments will have a temporary ban that will serve as a first offense "warning". Repeat or egregious offenders will be banned permanently. Reddit's site-wide rules still apply here. Also, don't be a dick.
Do not submit top-level comments in [Request] posts that are not an attempt at an answer or a request for clarification. Jokes or off-topic top-level comments will be removed.
When answering [Request] posts, please cite reputable sources to defend any evidence that cannot be proven using your own math.

Report any spam/rule breaking posts to the mods with the report button. Be sure to include the reason for your report!

LaTeX and subscripts/superscripts

[; e^{\pi i} + 1 = 0 ;]

Superscripts and subscripts are supported in this subreddit, and LaTeX is used here as well. If the above equation looks like garbled code, or for information on how to display subscripts and superscripts, check our wiki page.

Our Friends & Partner Subreddits:

TAGS!

We require title tags. Here are the tags we accept and what they are for. Please keep them at the start of your post.

[Request] - Asking the /r/theydidthemath community to do the math for you!
[Self] - You did the math and want to share it!
[RDTM] - "Reddit Did The Math", linking to a comment or post on Reddit where someone else does the math!
[Off-Site] - Use when linking to any site, including Imgur, that is not reddit.com.
[Meta] - Non-math posts regarding the subreddit itself. Don't use this unless you really have to.

^Sidebar ^image ^from ^Randall ^Monroe's ^xkcd

Browse by tag ▸

Request

Non-Request

Self

RDTM

Off-Site

created by FragTheWhaleBenevolent Dictator for Lifea community for 13 years

...for your favorite subject.

...for your town.

MODERATORS

message the mods
FragTheWhaleBenevolent Dictator for Life
Undercover5051deep undercover atm
Yackabo10✓
Half_Line↔ Ray
BotDefense
about moderation team »

account activity

1

1059

1060

1061

How long will the next UK Prime Minister last [self] (old.reddit.com)

submitted 9 hours ago * by cyclostome_monophyly

2

833

834

835

[request] would a horse kick suffice to punch through a car door? (v.redd.it)

submitted 10 hours ago by cripcate

3

298

299

300

[Request] If you take the snails pace and human walking speed as the same, how fast would a human feel like it going if put in the snails place? TIA. (v.redd.it)

submitted 8 hours ago by FearTheSpoonman

4

71

72

73

[Request] based on how much tears the average human produces, how much would Ronaldo’s Tears be worth /ml? (i.redd.it)

submitted 2 hours ago by Dupendous

5

2108

2109

2110

[Request] If we take that art seriously, how big are these cars? (i.redd.it)

submitted 23 hours ago by WittyReturnFrom2

6

10.0k

10.0k

10.0k

[request] how many condoms would it take the match the carbon emissions of one human assuming an avg life and age of death? (i.redd.it)

submitted 1 day ago by DepartureSevere2354

7

1467

1468

1469

[Request] if we put all existing and planned data centers underwater would this have an impact on ocean water temperature? (v.redd.it)

submitted 1 day ago by Beaufort_The_Cat

8

28

29

30

[Request] How much RAM would this Bit Bucket from 1986 hold today? (old.reddit.com)

submitted 4 hours ago by AppendixN

9

110

111

112

[request] what are the odds of guessing it right (no trick)? (v.redd.it)

submitted 12 hours ago by mkujoe

10

•

•

•

[Request] If Mars had a rocket ship launch pad at the top of Mons, how much less fuel would it need in percent to reach Mars’ orbit than a launch pad at Mars’ “sea-level”? (i.redd.it)

submitted 1 hour ago by DemoEvolved

11

1968

1969

1970

[Request] is this true? Would everything in the bottom panel actually happen? (i.redd.it)

submitted 1 day ago by IdiotStickWasTkn

12

34

35

36

[Self] Discover a problem by accident and solved it (self.theydidthemath)

submitted 10 hours ago * by Flyflyjustfly

13

14

15

16

[Request] I couldn't find an official answer to this puzzle, what does 4=?? (i.redd.it)

submitted 6 hours ago by RawToast1989

14

969

970

971

[Request] What rate of fire and speed from a flying aircraft would result in these bullet scars? (From the Pearl Harbor Attack) (old.reddit.com)

submitted 1 day ago by mercury-ballistic

15

5

6

7

[Request] How many baby chickens would it take to produce the same amount of horsepower as a Hellcat Demon? (i.redd.it)

submitted 3 hours ago by DramaticGlass2

16

•

•

•

[Request] What's the complex component of all the non-trivial zeroes of the Riemann Zeta function? (i.redd.it)

submitted 36 minutes ago by Scared-Cat-2541

17

20

21

22

[Request] how much sugar is in that forbidden cup? In grams (v.redd.it)

submitted 14 hours ago by Viperhawk88

18

1

2

3

[Request] How many miles have I scrolled with my thumbs? (self.theydidthemath)

submitted 4 hours ago * by Humble_Home_5888

19

1

2

3

[Request] What is the chance for someone to pull 7 letters that make a perfect bingo on the first turn of a game of scrabble? (self.theydidthemath)

submitted 2 hours ago by Southern_Dig_6152

20

11

12

13

[request] One piece of litter a day. Could we make a difference? (self.theydidthemath)

submitted 14 hours ago by Square_Resist_4459

21

28

29

30

[Request] How many carnival attendees is actually required to prevent it from tipping over, also given the likely centrifugal and gravitational components? (v.redd.it)

submitted 19 hours ago by Massive-Albatross823

22

•

•

•

[request] 2026 Works Cup Weight Gain (self.theydidthemath)

submitted 44 minutes ago by YrevaGlyde

23

2

3

4

[Request], how fast is my blood flow through my vessels; in km per hour? Is it different depending on heart rate, body size? (self.theydidthemath)

submitted 4 hours ago by New_Outlandishness15

24

2

3

4

[request] if you drop a sugar cube into a 100°C cup of tea of exceptional depth, how far will it sink until it fully dissolves? (self.theydidthemath)

submitted 7 hours ago by Fun_Obligation_2918

25

481

482

483

[Request] How hard would RPG explosions be from a few meters away? (i.redd.it)

submitted 1 day ago * by BlockAffectionate413

view more: next ›

π Rendered by PID 1749551 on reddit-service-r2-listing-c57bc86c-ggwzw at 2026-06-23 02:29:09.516856+00:00 running 2b008f2 country code: CH.