PIER: Ohm's Law Calculator
Bret Hardman
About this app
- Age 10
- Updated Nov 13, 2017
- OS IOS
Editor reviews
PIER: Ohm's Law Calculator is a fast, accurate electronics calculator for everyday circuit work. Enter any two known values to instantly solve for voltage, current, resistance, and power. Smart unit prefixes and conversions keep results consistent across V, A, Ω, and W, minimizing errors in labs and on-site. Ideal for students, hobbyists, and electricians who need a reliable, offline tool with a clean, productivity-focused interface and quick sharing.
Core functions include instant Ohm’s Law solving for V, I, R, P, automatic unit handling with m, k, M prefixes, and a lightweight workflow for circuit design and troubleshooting. Perfect for electronics study, repair, and high-efficiency field calculations.
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How to use:
1. Download and open the app on your device.
2. Select any two known quantities from voltage, current, resistance, or power.
3. Enter the values and choose the correct units; the remaining quantities calculate instantly.
4. Switch unit prefixes like mA or kΩ to compare results and improve readability.
5. Save or share the results for reports, tickets, or documentation, and clear to start a new calculation.