Free Electrical Engineering Calculator Tools
ResiCalc provides free, browser-based calculators for electronics coursework, lab handouts, and hobbyist projects. All tools run client-side — no account required.
Featured calculators
Capacitor Derating Calculator
Industry-standard 50% MLCC voltage derating — validated top performer in search.
Resistor Color Code Calculator
Interactive 4/5/6-band decoder with chart, tolerance & reverse lookup.
Series & Parallel Resistor Calculator
Equivalent resistance for any network — instant results, no signup.
Ohm's Law Calculator
Step-by-step V=IR solver for voltage, current, resistance and power.
LDO Regulator Calculator
Dropout, power dissipation and junction temperature for linear regulators.
SMD Capacitor Code Calculator
Decode 104 = 100 nF and other MLCC markings instantly.
For educators & lab managers
Link directly to any calculator from your syllabus, LMS, or lab manual. Tools include step-by-step formulas, FAQ schema for students, and printable guides. Ideal for intro circuits, component identification, and reliability modules.
Link to us
We welcome links from university course pages, maker communities (EEVblog, All About Circuits, Reddit r/AskElectronics), and EE resource directories. Suggested HTML:
<a href="https://resicalc.com/en/resources/">free electrical engineering calculators</a>
Suggested anchor text: free electrical engineering calculators · resistor color code calculator · capacitor derating calculator · Ohm's law calculator