Numerics Calculator & Converter
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Solve equations for X
Make it so you are able to enter, say, 3x+7=16 and it solves for x
15 votes 
Favorite currencies
The possibility to save favorite currency, either with the person signing in or using currency history.
15 votes 
14 votes

theme for the calculater
i think that there should be a box underneath the calculator that you can push and when you push it a list of themes will appear and then you get to pick one and then it will be the back ground for the calculator
13 votes 
Add Print
Print out the calculation history in a nicely formatted report. The browser built in print functionality doesn't capture the frames properly, it isn't well formatted, and it captures the input area and virtual keyboard which are not needed.
13 votes 
financial calculator!
PV FV IRR etc..
13 votes 
fuel consumption converter
fuel consumption converter
13 votes 
Add a table of values
Very simple, just add a tab that shows you how much of " " is in " ".
Like " " " "'s in a mile, " " " "'s in a pint, would also go from like feet to meters, and liters to galons. Very easy, just a table a values, very easily implemented, just for easy reference.12 votes 
design an Algebra Calculator (Algebrator?) With variables and a few "Smart" equasions builtin, like the Pytharorean therum.
I'm thinking of something like a scientific calculator, plus variables like you use in Algebra all the time!
(Should a PC be able to handle that? This will be a first, according to Google!)
12 votes 
12 votes

Update
Today Sept 11 2018 Currencies are not updated
12 votes 
Make it Resizeable
Make the interface to Resize so it can fit smaller area on the screen
11 votes 
savings calculator (similar to the loan expert)
How about making a savings calculator to see how much you can earn by making periodic investments at a given yield. This could be built into the loan expert page
11 votes 
wolfram alpha integration
wolframalpha provides graphs, integral forms, expanded forms, equation solving, factual lookup etc.
11 votes 
Synchronized custom functions on a signed Google account
it's better if user defined functions can be synchronized between different machines based on a signed Google account.

zd11 votes 
Oil Field Conversions
Examples:
Volume  bbl to m3 to gal(us) etc....
Pressures  you have pascals, but could you add kPa and MPa? I know its just simple divisions, but it's just handy to have.
Forces  The same as pressures, daN
Flow Rates  gal(us)/day, hour, minute, and second. cubic foot, liter, cubic meter, barrels (bbl) etc.
Thanks.11 votes 
may be your device can calculate between dates in order to show how many days (or months) past
calc between dates, to show how many days are
10 votes 
Definite Integral Calculator, Limit Calculator, Logarithms of any base.
Needs to do the above things, or else a standard scientific calculator would be much better.
10 votes 
10 votes

10 votes
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