# Looking for an equation reference **URL:** \ **Category:** Factual Questions\ **Created:** [February 11, 2005, 12:35pm UTC](https://boards.straightdope.com/t/looking-for-an-equation-reference/289568 "2005-02-11T12:35:19Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Nim](https://avatars.discourse-cdn.com/v4/letter/n/67e7ee/32.png) [@Nim](https://boards.straightdope.com/u/Nim)\ **Post date:** [February 11, 2005, 12:35pm UTC](https://boards.straightdope.com/t/looking-for-an-equation-reference/289568/1 "2005-02-11T12:35:19Z")
Im looking for a website or book that I can look up any kind of equation in, does anyone know of a website or book like this? ---
**Author:** ![zut](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/zut/32/2875_2.png) [@zut](https://boards.straightdope.com/u/zut)\ **Post date:** [February 11, 2005, 1:11pm UTC](https://boards.straightdope.com/t/looking-for-an-equation-reference/289568/2 "2005-02-11T13:11:10Z")
Depends on how exactly you’re looking it up. By name, perhaps? One possibility is [Mathworld.](http://mathworld.wolfram.com/) Does this do what you want? ---
**Author:** ![asterion](https://avatars.discourse-cdn.com/v4/letter/a/4da419/32.png) [@asterion](https://boards.straightdope.com/u/asterion)\ **Post date:** [February 11, 2005, 1:22pm UTC](https://boards.straightdope.com/t/looking-for-an-equation-reference/289568/3 "2005-02-11T13:22:59Z")
[CRC Press](http://www.crcpress.com/shopping_cart/categories/categories_products.asp?parent_id=99) sells a lot of reference books. They might have a good one. ---
**Author:** ![Nim](https://avatars.discourse-cdn.com/v4/letter/n/67e7ee/32.png) [@Nim](https://boards.straightdope.com/u/Nim)\ **Post date:** [February 11, 2005, 8:44pm UTC](https://boards.straightdope.com/t/looking-for-an-equation-reference/289568/4 "2005-02-11T20:44:54Z")
> [@zut](#): > > Depends on how exactly you’re looking it up. By name, perhaps? One possibility is [Mathworld.](http://mathworld.wolfram.com/) Does this do what you want? Any kind of equations are good. What Im mostly looking for is basic equations for science, math and finances or interesting equations like the one for time dilation that can tell you have slow you have aged at when traveling at a certain speed for a certain amount of time. Mathworld seems to have a lot, Im still shifting through it, I can’t believe I didn’t come across this site before. ---
**Author:** ![MikeS](https://avatars.discourse-cdn.com/v4/letter/m/919ad9/32.png) [@MikeS](https://boards.straightdope.com/u/MikeS)\ **Post date:** [February 11, 2005, 9:58pm UTC](https://boards.straightdope.com/t/looking-for-an-equation-reference/289568/5 "2005-02-11T21:58:30Z")
Yeah, the OP is like asking for a book where you could look up any kind of sentence. If you’re looking for just random equations (for an art project or something similar), then I’m sure you could get a lot out of Mathworld, and its sister sites: Eric Weisstein’s World of [Physics](http://scienceworld.wolfram.com/physics/), [Chemistry](http://scienceworld.wolfram.com/chemistry/), and [Astronomy](http://scienceworld.wolfram.com/astronomy/). ---
**Author:** ![Squink](https://avatars.discourse-cdn.com/v4/letter/s/b5e925/32.png) [@Squink](https://boards.straightdope.com/u/Squink)\ **Post date:** [February 11, 2005, 10:34pm UTC](https://boards.straightdope.com/t/looking-for-an-equation-reference/289568/6 "2005-02-11T22:34:03Z")
An entertaining and enlightening source for all things, including equations, geometric: [The Geometry Junkyard](http://www.ics.uci.edu/~eppstein/junkyard/all.html) ---
**Author:** ![Mathochist](https://avatars.discourse-cdn.com/v4/letter/m/c89c15/32.png) [@Mathochist](https://boards.straightdope.com/u/Mathochist)\ **Post date:** [February 12, 2005, 12:00am UTC](https://boards.straightdope.com/t/looking-for-an-equation-reference/289568/7 "2005-02-12T00:00:08Z")
> [@Nim](#): > > Any kind of equations are good. What Im mostly looking for is basic equations for science, math and finances or interesting equations like the one for time dilation that can tell you have slow you have aged at when traveling at a certain speed for a certain amount of time. > > Mathworld seems to have a lot, Im still shifting through it, I can’t believe I didn’t come across this site before. I get the impression you’re looking for window dressing more than edification, neh? ---
**Author:** ![wolf\_meister](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/wolf_meister/32/15202_2.png) [@wolf\_meister](https://boards.straightdope.com/u/wolf_meister)\ **Post date:** [February 12, 2005, 2:00am UTC](https://boards.straightdope.com/t/looking-for-an-equation-reference/289568/8 "2005-02-12T02:00:18Z")
I have some equations on my site: [Quadratic Equation](http://www.1728.com/quadratc.htm) [Time Dilation](http://www.1728.com/reltivty.htm) [Circle Sphere & Cylinder](http://www.1728.com/diamform.htm) There are others but you’ll have to look for them. I’m not going to list all of them. Good luck.