Automotive Diagnostic Tools
The BTAT calculator app is now built directly into the website.
Electrical & Circuit Calculators
Use the complete calculator interface on desktop or mobile.
Electrical Laws
Combined Ohm's Law and Watt's Law plus standalone teaching calculators.
Unit Converter
Convert voltage, current, resistance, and power across common electrical scales.
Series Circuit Solver
Solve source voltage, current, total resistance, individual resistance, and voltage drops.
Parallel Circuit Solver
Solve total and branch values from the information you know.
Series-Parallel Calculator
Build a chain of series resistors and parallel groups and calculate circuit values.
Fuse Current
Estimate current from fuse millivolt drop using the app's fuse reference values. Access control will be added later.
Website + Installable Tool
When the final site is hosted over HTTPS, the calculator can also function as an installable Progressive Web App on supported devices.