Imperial v US liquid measurement

Metroman · Apr 7, 2008

I have just taken delivery of some Diafine and as I was reading the instructions for mixing, it occurred to me that - in theory - there is a difference between an imperial and a US quart.

In practice though should I worry if I make A & B up as an imperial quart?

thebanana · Apr 7, 2008

A UK quart is 1.14L
A US quart is .95L

Ole · Apr 7, 2008

In practice, do as the rest of us: Quarts are too fuzzy, go metric and use 1 liter.

dpurdy · Apr 7, 2008

If you are drinking beer, drink an English pint. And while you are at it, make sure they don't put American beer in it.
Dennis

Anscojohn · Apr 7, 2008

I'm with Ole--go metric.

John, Mount Vernon, Virginia USA

PhotoJim · Apr 7, 2008

I agree to go metric, but Diafine comes in US measure packages.

I'd mix it as intended (i.e. in US quarts or gallons) so that you have the proper strength of each chemical.

PhotoJim · Apr 7, 2008

dpurdy said:
If you are drinking beer, drink an English pint. And while you are at it, make sure they don't put American beer in it.

If the American beer is Michelob Amber Bock, I'll take it. Yum.

analogfotog · Apr 7, 2008

dpurdy said:
If you are drinking beer, drink an English pint. And while you are at it, make sure they don't put American beer in it.
Dennis

Try any of the Adirondack products, if you can get them, especially the lagers. Delicious!! And this is coming from a Canadian who considers most Canadian mass produced beers to be not worth drinking, with the possible exception of Sleeman products, or Moosehead.

If you ever get to the Carleton Place, Ontario area, check the local pubs for a locally brewed ale called Corporal Punishment; it's worth the trip!

Anscojohn · Apr 7, 2008

PhotoJim said:
I agree to go metric, but Diafine comes in US measure packages.

I'd mix it as intended (i.e. in US quarts or gallons) so that you have the proper strength of each chemical.

******
Yup. He measures out liquids to end up with 946 ml of each solution if it's a quart kit.

John, Mount Vernon, Virginia USA

Ole · Apr 7, 2008

I would still accept the 5% difference in final volume. Most measuring cups are less accurate than that!

dpurdy · Apr 7, 2008

analogfotog said:
Try any of the Adirondack products, if you can get them, especially the lagers. Delicious!! And this is coming from a Canadian who considers most Canadian mass produced beers to be not worth drinking, with the possible exception of Sleeman products, or Moosehead.

If you ever get to the Carleton Place, Ontario area, check the local pubs for a locally brewed ale called Corporal Punishment; it's worth the trip!

You are talking to someone from Portland Oregon, a mecca of micro brewed ales. Come here for the Oregon Brewer's festival every July!! When I said don't fill the imperial pint glass with American beer I meant bud light. Or any other of the "Great American Lagers" as the proclaim themselves. No accounting for taste, I guess, or maybe it is just a matter of being adventurous.

Terrence Brennan · Apr 7, 2008

analogfotog said:
Try any of the Adirondack products, if you can get them, especially the lagers. Delicious!! And this is coming from a Canadian who considers most Canadian mass produced beers to be not worth drinking, with the possible exception of Sleeman products, or Moosehead.

If you ever get to the Carleton Place, Ontario area, check the local pubs for a locally brewed ale called Corporal Punishment; it's worth the trip!

I can vouch for Corporal Punishment as one of the best ales I have ever tasted. You can get it at Ballygiblin's Pub, on Bridge Street, Carleton Place, Ontario. If you drop in for a pint, you can also see eight of my fine photographs (six B&W, two colour) on display until the end of May!

Akki14 · Apr 8, 2008

I mixed my diafine based on metric, slightly rounded, although i had accidently bought the gallon kit so i still have half a gallon of diafine sitting around unused.

CBG · Apr 8, 2008

Ole said:
...Most measuring cups are less accurate than that!

Which is why I am transiting to weight based measurements where practical. Learned it through, of all things, bread making. The fudge factor measuring flour by cups is huge. Getting a gram scale that zeros made my bread making faster, easier , and more accurate all at once.

I'm starting to look for a scale that reads a very small total capacity, maybe 25 to 75 grams, but accurate down to .01 gram for finicky things like phenidone, iodide, pinacryptol ... where small amounts are used.

C

Vaughn · Apr 8, 2008

Andy, I also go along with Ole and just mix it as if metric...substituting liters for quarts straight across. You'll be establishing your development time based on your results using whatever dilution you end up with.

Vaughn

Metroman · Apr 8, 2008

Thanks guys. Fortunately today my wife found an old box of beakers in the back of one of her labs at work and they have US fluid ounce markings. The litres for quarts also makes sense so will give that a whirl on the next batch and adjust as necessary.

As for the beer I'll stick with Tiger or San Miguel !

Anscojohn · Apr 8, 2008

CBG said:
Which is why I am transiting to weight based measurements where practical. Learned it through, of all things, bread making. The fudge factor measuring flour by cups is huge. Getting a gram scale that zeros made my bread making faster, easier , and more accurate all at once.

I'm starting to look for a scale that reads a very small total capacity, maybe 25 to 75 grams, but accurate down to .01 gram for finicky things like phenidone, iodide, pinacryptol ... where small amounts are used.

C

*******
Sadly, not grams; but my scale for reloading ammunition measures to 1/10 grain.

John, Mount Vernon, Virginia USA

Bob-D659 · Apr 8, 2008

Keep your eyes out for an old Mettler P1210 lab balance, 1,200 gram capacity in increments of 0.01 grams.

The older glass fronted Sartorius and Mettler balances go down to 0.001 or 0.0001 grams. Not recommended purchases, as they have glass knife edge pivots and it they are shipped without the internal packing pieces installed, the pivots get chipped. You can pretty much bet every one on the 'bay has been trashed this way.

Mike Té · Apr 8, 2008

Well, cool, Terrence!

Now I have 2 good reasons for a spring excursion to Carleton Place. I wasn't aware of the pub nor the beer; to see a photo exhibit will be a bonus. (I love going for drives in the spring to check out the spring runoff).

Are you in the town of C-P itself?

Terrence Brennan said:
I can vouch for Corporal Punishment as one of the best ales I have ever tasted. You can get it at Ballygiblin's Pub, on Bridge Street, Carleton Place, Ontario. If you drop in for a pint, you can also see eight of my fine photographs (six B&W, two colour) on display until the end of May!

FilmIs4Ever · Apr 10, 2008

An Imperial Gallon is 160 Imperial Fluid Ounces, which means an English weighs 10 lbs. A U.S. Gallon contains 128 slightly larger fluid ounces, and is defined by cubic volume rather than weight in water. It is the old Queen Anne Wine Gallon that was adopted by American colonists for all liquid measures, not just wine. Anyway the U.S. Gallon is 231 cubic inches. Now, in terms of weight, a U.S. Gallon is about 8 1/3 lbs. Therefore, since a U.S Quart is 1/4 of a U.S. Gallon, 32 fl. oz., 32 U.S. fl. oz. x ~1.04 U.S. fl. oz./imperial ounce, you have about 33 fl. oz. 2 fl. dr. (33.28) Imperial Ounces.

Honestly, if you just remember to use a 128 gallon instead of a 160 ounce gallon you'll be fine. 33.28 compared to 32 is a negligable difference.

Remember too, all of those touting metrics, that one, metrics have never taken man to the moon, but customary units have, nine times, two most measuring containers commonly used in darkrooms only go down to 25 or maybe 10-mL increments, so they aren't any more accurate. Further you can divide U.S. increments in halves to 1/2048 of a gallon (not so much for the Brits, but they can also divide their gallon in thirds)

U.S. liquid measurement is actually quite a nice, easy system.

1 U.S. gallon (~3.76 L)
equals 2 pottles (half gallons)
equals 4 quarts
equals 8 pints
equals 16 cups (although a cup of coffee is usually 6 U.S. fl. oz.)
equals 32 gills
equals 64 jacks
equals 128 fluid ounces (85 1/3 ponies 1 1/2 oz.)
equals 256 tablespoons (768 teaspoons, 1/3 tbsp ea.)
equals 1024 fluid drams
equals 61440 drops minims (1/60 of a fl. dram)

Also, degrees Fahrenheit, being smaller are inherently more accurate for temperature measurement, since they are 5/9 of a degree Celsius. Miles, feet, and inches also allow for nice halving several times over, and in addition allow easy division by thirds. When I drive 90 MPH down the interstate, I'm going 132 feet per second. Everyone else around me going the speed limit is going 88 feet per second. Do that with kph and mps.

Hope this helps.

richard ide · Apr 10, 2008

Terrence,

Greetings,
I can remember two excellent beers from about ten years ago from a brewery in Carleton Place. The names escape me at the moment. I look forward to getting out that way soon.

Regards

johnnywalker · Apr 10, 2008

I'm trying to decide if FilmIs4Ever's post was really done by TongueInCheek.

FilmIs4Ever · Apr 10, 2008

Nope, sorry, just me.

Ole · Apr 10, 2008

FilmIs4Ever said:
...

Also, degrees Fahrenheit, being smaller are inherently more accurate for temperature measurement, since they are 5/9 of a degree Celsius. Miles, feet, and inches also allow for nice halving several times over, and in addition allow easy division by thirds. When I drive 90 MPH down the interstate, I'm going 132 feet per second. Everyone else around me going the speed limit is going 88 feet per second. Do that with kph and mps.

Hope this helps.

Degrees Fahrenheit may be more "precise", but they are certainly not more accurate. For precise temperature, the milliKelvin beats the Fahrenheit every time.

36 kph is 10m/sec. No more difficult.

Since metric measurements allow for making smaller units simply by adding a prefix, it's easy to make derived units like the picoliter (10^-12 liter). What's the equivalent in minims?

Having all the conversion factors the same and indicating the factor of ten by prefixes has got to be easier than remembering 11 completely unrelated names for different volumes, and they're different for different substances as well!

Mike Té · Apr 10, 2008

Not on my digital thermometer.

FilmIs4Ever said:
Also, degrees Fahrenheit, being smaller are inherently more accurate for temperature measurement...

Imperial v US liquid measurement

Metroman

thebanana

Ole

Moderator

dpurdy

Anscojohn

PhotoJim

PhotoJim

analogfotog

Anscojohn

Ole

Moderator

dpurdy

Terrence Brennan

Akki14

CBG

Vaughn

Metroman

Anscojohn

Bob-D659

Mike Té

FilmIs4Ever

richard ide

johnnywalker

FilmIs4Ever

Ole

Moderator

Mike Té

Imperial v US liquid measurement

Moderator

Moderator

Moderator

Privacy & Transparency

Privacy & Transparency