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Calchemy - Units Calculator

Calchemy - Units Calculator
  • #: 13505
  • Price: $1.99 In Apple Store
  • Category: Utilities
  • Updated: 2009-07-05
  • Current Version: 1.0
  • 1.0
  • Size: 0.40 MB
  • Language: English
  • Seller: Ken Burgess
  • Requirements: Compatible with iPhone, iPod touch, and iPad. Requires iOS 2.2.1 or later
  • © Calchemy Software Inc
  •  Add to Favorite apps



Finally, a revolutionary new calculator that “understands” units of measure! Calchemy is the combination of a units conversion engine and a scientific calculator that greatly simplifies real-world problem solving.

With Calchemy you get the answers to your real-world calculations in the units you want, without ever having to look up or enter a conversion factor. Just enter the numbers into a calculation along with their units of measure, Calchemy does all the necessary unit conversions for you automatically when it solves the equation. It also makes sure sure your equation is dimensionally correct.

Calchemy makes getting correct results so simple, you might find yourself calculating just for fun!

One of the most frustrating elements of real-world calculations is that units conversions are often required to get the data you have into a form that is compatible with a known physical relationship. This is a result of the widespread use of so-called "practical units" that are prevalent in almost every field of technology. With Calchemy the units are carried through calculations with conversions applied as required to deliver the answer in the units you specify. In fact, quite remarkably, in many cases a math-magical technique built into Calchemy called "Solve By Dimensional Analysis" can even derive the algebraic equation relating the parameters for you!

Calchemy is great for solving problems that deal with energy, renewable resources, power, pressure, volume, area, force, speed, distance etc. Calchemy “understands” hundreds of units of measure and many physical properties, so you can focus on the problem and not be distracted by conversions. From basic unit conversions, to complex calculations, Calchemy does them in "one line"!

Take a look at the examples below and then give Calchemy a try for yourself, you won't be disappointed, real-world problem solving has never been so easy!

What is 10 kilometers per liter in miles per gallon?

10 km/l ? mpg

= 23.5215 mpg

What is the length of the sides of a square 3 acre garden?

sqrt(3acres) ? ft

= 361.497 ft

How much power does it take to deliver compressed air at 5 cubic feet per second and 200 psi?

200 psi ; 5cfs ? hp

= 261.919 hp

What is the radius of a balloon that holds one gallon of water?

( 3 / (4 pi) * 1 gal )^(1/3) ? inches

= 3.80634 inches

How long should I leave my lawn sprinkler running?

(50 ft * 30 ft * 0.75 inches/week) / (5 gal/min) ? hours/week

= 2.33766 hours/week

How long will it take to get hot water from a water heater to the faucet through 160 ft of half inch (id) tubing with a flow rate of 5 gallons per minute?

pi * (0.25 inch)^2 ; 160 ft ; 5 gal/min ? sec

= 19.5839 sec

How long will it take for my hot water heater to fully recover after the shower goes cold?

40 gal ; 120 degF – 45 degF ; hsv_water ; 40000 btu/hr ? min

= 37.5542 min

What is the equivalent “charging power” when I fill up the gas tank on my car (in 2 min and 20 seconds)?

20 gal ; 2 min + 20 sec ; hcv_gasoline ? megawatts

= 17.4872 megawatts

OK, last one, using Calchemy (and statistics from the web), I calculate that at the current rate of world fossil fuel consumption the volume of CO2 gas added to the atmosphere each year is a layer one half inch thick covering the whole earth (at sea level). So after 120 years of consumption it would be up to my nose... Um, how long have we been burning fossil fuels?

Have FUN calculating!

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Calchemy - Units Calculator iPhone Screenshot 1

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Rated 5/5 based on 3 customer reviews.


5/5 stars

Just what I always wanted!

I had a leaky toilet that was using about a drop a second, and I wanted to know what that was in gallons/month...

So I measured 16 drops of water (i.e., 16 seconds worth) in a teaspoon, and entered the equation:

1 tsp/16 seconds ? gal/month

And out popped my answer of 213 gal/month!

5/5 stars

Un Flipping Believable!

Wow. I wish I had this app when I was in engineering school. The best part about it is even though I've long since forgotten much of what I learned, I no longer need to dig out old textbooks or Google conversion factors to figure things out - Calchemy has all the conversions built in, and its dimensional analysis capabilities mean I can provide it data in whatever units I have and Calchemy does all the conversions, automatically figures out what goes in the numerator and what goes in the denominator., and even warns me if there is a dimensional mismatch (meaning I haven’t provide enough data, or provided the wrong units).

Want to know how many horsepower are required to pull a 6000 lb trailer up a 10% grade at 60 MPH (not including wind and rolling resistance, of course)? Just enter:

6000 lb; 10%; 60 mph ? hp

Then press the = button, and you get the result: 96 HP. See how long it takes you to do that with your trusty scientific calculator.

This is a must-have app for any engineering or physics student. Read the online help (look for the little life preserver icon on the left-hand side) from start to finish - it is very well written and will substantially reduce your learning curve.

5/5 stars

best so far

I'm an engineer and have purchased 3 conversion apps before this one. This is by far the most complete unit conversion tool available through the app store so far.


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