When people are trying to convey a quantity, they will generally try to compare it to something that they think people already have a feel for. For example, ‘weighing as much as 10 elephants’ or ‘twice the area of a tennis court’. But people often come up with terrible comparisons, and this grates on my nerves. So I have done a little side project to generate comparisons for you. I named it ‘How many elephants’ as elephants (and Jumbo jets) seem to figure a lot in these comparisons.
It allows you to create comparisons for:
- Length/Height
- Area
- Volume
- Mass/Weight
- Time
- Velocity/Speed
- Energy
I might add more dimensions, such as force, acceleration and pressure, later on.
You can try it at http://howmanyelephants.co.uk/ .
It is just a single page of HTML + CSS + JQuery. I used Microsoft Copilot to generate the image and, as a sort of turbocharged Stackoverflow, to help me with the coding.
Did I miss a good comparison or make a mistake? Feel free to give some feedback in the comments.

Nice! The Reg has some more ideas: https://www.theregister.com/Design/page/reg-standards-converter.html
I hadn’t seen that. I’m definitely adding the ‘Liz Truss’ as a unit of time. Thanks!
Any idea where ‘maximum velocity of a sheep in a vacuum’ comes from?
See https://www.theregister.com/2007/08/24/vulture_central_standards/ and get ready for some proper science.
I’m not convinced their equation is dimensionally correct. ;0)