Electrical Formulas is an app for anybody that needs to convert the following:
kVA - Amps - Single and three phase.
Amps - kVA - Single and three phase.
kW - kVA
kVA - kW
Electrical Formulas also has a Voltage Drop calculator and covers both mm2 and AWG cables for both single and three phase supplies.
Electrical Formulas also has a power equation calculator, Select your voltage, then enter either amps or watts to calculate the loading.
Updated for iOS 8 & 9 - Sorry for the massive delay!
Ratings and Reviews
Good for figuring out approximate current ratings in the early stages of designing a system. Much easier to have this on a phone compared to using the calculator or the chart I you're in a pinch. I like the 3 phase table with the wire gauges. However, they could throw in an option for 400v and 575v for European and Canadian voltage. Also for an app you have to pay for, it'd be nice to have a few extra features.
Up to six family members will be able to use this app with Family Sharing enabled.