131–140 of 205 posts
1 cup of butter -> g
This is pretty cool, it's one of the rare applications I've used where the things I've tried "just work". For example "10 kg to g", "c", "c to km s^(-1)", "c to km/s" all work intuitively. It's great it works at the command line too. Something I wish I'd had when I was studying Physics.
All of these things work in Google, btw. Google has one of the best unit conversion tools, and it's built into the search.
10EUR + 11 USD + 1500 USD + 500CAD in ZAR
I really like the UI and seeming wealth of different units. It doesn't look like it supports fluid ounces though. I tried "4 tbsp to oz" and it interprets oz as mass instead of volume. Google correctly gives me 2 as the answer.
Thank you for the feedback. I'm not sure how to support this. I would probably have to call it "fluid_ounce" / "fl_oz" or "fl.oz." in order to distinguish it from the unit of mass.
Having to learn that you can type "floz" is better than not being able to do it at all.
(You could also allow "fl oz", "fluid ounce", "fl ounce", etc. if you tweak your parser a little bit, but that's the deluxe version, and any functionality at all would be a big improvement.)
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I've always been frustrated by how Google's unit conversion doesn't integrate well with its calculator.
How is wolfram alpha? I always use it for more complicated pure math, but I don't think I ever used it for unit conversion.
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That's because your unit conversion is invalid. It's entirely possible to construct an equation that computes mi/gal from L/km (or from gal/mi for that matter), but the dimmensionalty of the two numbers clearly disagree. Yes, you can introduce scenarios like yours where "any human" would know what the intended meaning of the question is, but mathematically speaking it's incorrect and encouraging a calculator to perfo…
I don't remember which calculator did this (I think GNU units), but I've seen this handled automatically with a warning saying "Warning: reciprocal conversion"
$ units
Currency exchange rates from www.timegenie.com on 2016-06-21
2926 units, 109 prefixes, 88 nonlinear units
You have: 7.8L/10km
You want: miles/gallon
reciprocal conversion
* 3.0155716
/ 0.33161209
Found a bug : sin(pi) = 8.62803e-81
≫ 1 mile / 2 km
1 mi / 2 km
= 0.804672
≫ 1/2km
1 / 2 km
= 0.5 km⁻¹
$ cat .units
period(len) units=[m;s] 2pi*sqrt(len/gravity) ; (period/2pi)^2 * gravity
$ units
2980 units, 109 prefixes, 97 nonlinear units
You have: period(20cm)
You want:
Definition: 0.89729351 s
You have: period(20cm)
You want: ms
* 897.29351
/ 0.0011144625
You have: period(2ft)
You want: ms
* 1566.5419
/ 0.00063834872
You have: 5 GiB
You want: bytes
* 5.3687091e+09
/ 1.8626451e-10
You have: 5 hundred million
You want:
Definition: 5e+08
You have: tempF(100)
You want: tempC
37.777778
I like the idea of keeping units, but I'm not sure this makes things easier:
≫ V * A / J
V × (A / J)
= 1 V·A/J
You have: V*A/J
You want:
Definition: 1 / sEarlier quoted context omitted.
That's why 99% of the time there's no need to use the calculator, just type your formula straight into the search.
And use a remote server with at least 1RTT of delay to do basic arithmetic. Big Data indeed.