Engineering Calculators
Fast, accurate tools for 4-band and 5-band precision components.
Hardware
4-Band Resistor Tool
Decode standard 4-band resistors with tolerance.
1.0 kΩ ±5%
Hardware
5-Band Resistor Tool
Decode precision resistors instantly.
100 Ω
Theory
⚡ Ohm's Law Calculator
Leave the target variable blank to solve for it.
Enter values to compute.
Design
💡 LED Series Resistor
Calculate current-limiting values for safe circuits.
Fill variables to determine loading.
Thermal
🌡️ Temperature Converter
Convert environmental values to absolute Kelvin scales.
273.15 K