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  • #: 233061
  • Price: $2.99 In Apple Store
  • Category: Productivity
  • Updated: 2008-08-15
  • Current Version: 1.1
  • 1.1
  • Size: 0.10 MB
  • Language: English
  • Seller: West Side Systems, LLC
  • Requirements: Compatible with iPhone, iPod touch, and iPad. Requires iOS 2.0 or later
  • © 2008 West Side Systems, Eric Cornwell
  •  Add to Favorite apps



PowerCalc performs basic electrical power calculations with watts, volts, amps, and motor power factor. It works in three modes:DC mode - simple watts, volts, amps calculations. Set the voltage, then enter a wattage to determine the electrical….. Read more

iPhone Screenshots

PowerCalc iPhone Screenshot 1
PowerCalc iPhone Screenshot 2
PowerCalc iPhone Screenshot 3
PowerCalc iPhone Screenshot 4

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Customer reviews

Rated 1/5 based on 3 customer reviews.


0/5 stars
Wrong formula.

The 3 phase RESISTIVE formula for Watts is wrong. Should be

(SQUARE ROOT OF 3; NOT 3) x volts x amps = W.

0/5 stars
Calculations are Incorrect

Only works for single phase and dc power. The 3 phase calulations are off formula should be watts/volts/1.73 = amps not watts/volts/3. And there is no such thing as two phase power. Nifty tool idea. Wish they would update.

4/5 stars
I like the program, but...

It seem to work well on the smaller single-phase answers. I haven't tried the 3-phase test too much, so I cannot speak directly to that or to the newer features for inductive or DC. The other apps produced by this company seem to work well, though, so if there are math errors, it is probably an oversight.

I like the large display, etc. What I don't like is that there is no ability to zero out all of the fields. You can zero watts and amps, but volts only "zero" to one. I'm not speaking to calculate zero values but to simply clear the formulas to help reset things for later use.

As to the complaints about the higher/lower voltages: I would say that we calculate to have clarity of the amp/voltage draw. In the technical theatre world, we DO calculate this extensively. We don't need a limitation of 50V, which is not practical. I use 120 and some 115/110 in older situations. It is necessary to calculate 3-phase for some distributions. So the "if you have to calculate it, you don't need it" is not accurate. However, we DON'T need the ability to calculate the distribution on a 500,000v substation either, so that's not practical.

Many of you are missing the point of this program and its functionality. If it's falling in line with the other programs developed by West Side, it's for the purposes of theatre applications, not electrical contracting. His BeamCalc and DMXCalc are perfect examples of this.

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