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panache45
06-13-2003, 09:06 PM
Does anyone make a calculator with which I can add or subtract minutes and seconds by entering them as decimals? For example: 5.50 + 2.15 = 8.05 (5 min 50 sec + 2 min 15 sec = 8 min 5 sec). I have a "scientific" calculator that takes several extra key strokes to do this, and it sure would help if I can input the figures decimally.

Q.E.D.
06-13-2003, 09:13 PM
How's this? (http://www.calculated.com/products/9426.html?office)

panache45
06-13-2003, 09:28 PM
I notice that calculator has keys marked "hour," "min," and "sec," and I would guess you'd have to hit these keys before or after the numbers; that's similar to the one I already have. I want to be able to just hit the numbers separated by the period, like in base-10.

Q.E.D.
06-13-2003, 09:37 PM
According to the online user's manual, the calculator will accept input in either format. So, if you wanted to enter 4 1/2 hours, you type [4][.][5][HOURS].

urban1a
06-13-2003, 10:22 PM
Radio Shack used to have a calculator named 'ChronoMath' and I have one. I don't know whether they still have one, or not. Mine no longer works since it isn't Y2K compatible.

Bob

xash
06-14-2003, 01:17 AM
Here's one that works that way (although the calculator was written for some other specific purpose) ... to subtract, just add a minus sign before the number.

http://www.csgnetwork.com/timescalc.html

xash
06-14-2003, 01:19 AM
Wait... that calculator doesn't make sense... since it doesn't convert to the 5min 50 sec format at all. Sorry, ignore my previous post.

MC Master of Ceremonies
06-14-2003, 05:20 AM
A scientific caculator should have a degrees, minutes, seconds button (probably marked DMS) which though its for the measurment of angles allows you to work in base-60 fractions.

Crafter_Man
06-14-2003, 09:12 AM
I have Casio FX-451. I’ve used it for 20 years. It has two “base 60 conversion keys”: One key converts a real number to hours, minutes, seconds (h/m/s), while the other key converts h/m/s to a real number.

Ponder Stibbons
06-14-2003, 09:19 AM
Yes, yes, these all have "conversion keys". But I think what panache45 was getting at was the ability to, say, hit a single key for "Time Mode" and then you don't worry about conversions, you just type in 12.30.25 and it knows you mean "12:30:25" and you can manipulate it the same as any "regular" number. Now that would be handy!

MC Master of Ceremonies
06-14-2003, 09:25 AM
With degrees minutes seconds you should be able to set up your calculator to work exclusively in base-60.

sailor
06-14-2003, 10:57 AM
And, of course, you can always use a spreadsheet or a programmable calculator.

jimpatro
06-15-2003, 01:13 AM
Look for the Framemaster Timecode calculator.
We use it in the Broadcast and Film industry.
It covers Hours, Minutes, Seconds and Frames.
Drop Frame or Non-Drop Frame.

Derleth
06-15-2003, 01:22 AM
And I'd just program my calculator to do the conversions automatically.

But I'm a hacker. That's how I approach a problem.