The Zero-BS Engineering & Electronics Calculator Suite
Precision tools for hardware makers, engineers, and students. Instant formulas, zero intrusive ads, zero tracking.
⚡ Quick Ohm's Law & Power Solver
Adjust sliders or numbers to see instant mathematical convergence
All Precision Calculators
10 verified toolsOhm's Law Calculator
Solve any two parameters of Ohm's Law (V = I × R) and Power (P = V × I) instantly with live SVG circle visualizer.
LED Series Resistor Calculator
Prevent burning out LEDs by finding the exact resistance and recommended standard resistor wattage.
Voltage Divider Calculator
Quickly design potential dividers for ADC input scaling, level shifting, and reference voltages.
Battery Life & Runtime Calculator
Estimate real-world operating time of battery powered systems factoring in discharge derating.
PCB Trace Width Calculator (IPC-2221)
Prevent trace overheating using the industry-standard IPC-2221 formula for 1oz and 2oz copper.
555 Timer Astable Frequency Calculator
Design pulse generators, PWM clocks, and LED flashers instantly.
RC Low-Pass Filter Calculator
Filter high-frequency noise and smooth PWM signals into analog voltages.
dBm to Watts & Volts Converter
Essential RF engineering tool for Wi-Fi, LoRa, cellular, and antenna transmitter power.
AWG Wire Gauge & Resistance Calculator
Size power cables properly to avoid catastrophic voltage drop and melted wiring.
SMD Resistor Code Calculator (3-Digit, 4-Digit, EIA-96)
Decode tiny markings on surface mount parts instantly with visual SMD chip preview.
🛠️ Need High-Precision Components or PCB Fabrication?
Order high quality prototype PCBs for $2 with fast global shipping, or explore verified metal film resistor kits.