Resistor Color Code Calc + vs Resistor Code Calculator Pro

▶ Decode any resistor in seconds. Tap the color bands on a big, clear resistor graphic and the value, tolerance and temperature coefficient update live — 4, 5 or 6 bands, with the nearest E24 or E96 standard shown too. ▶ Go the other way. Type a value like 4.7k and the app snaps it to the nearest standard part and paints the color bands back onto the resistor, with the error against your input. ▶ Everyday electronics math in one place. Ohm's law solves V, I, R or P from any two; the LED resistor tool sizes a series resistor from supply voltage, LED forward voltage and current. ▶ Read SMD codes fast. Enter a 3-digit, 4-digit, R-notation or EIA-96 code and get the value, plus series and parallel resistance helpers for quick combinations. ▶ Works fully offline with a clean history of your calculations. Share a result, switch languages, no account needed. Color names and values follow the standard IEC bands; always double-check critical parts against the printed markings and a meter. This is a reference and learning tool, not a substitute for measuring your actual components.

Resistor Calculator is a practical offline toolbox for electronics students, makers, repair technicians, and engineers who work with resistors and common circuit calculations. Decode resistor color bands, convert resistance values into color bands, read SMD resistor markings, browse E-Series values, and solve everyday resistor-related circuit problems in one focused app. RESISTOR TOOLS • Decode 3, 4, 5, and 6-band resistors • Convert resistance values into color bands • Support engineering notation such as 4.7k, 4k7, 2M2, and 0R22 • Calculate tolerance, minimum, and maximum resistance • Show temperature coefficient for 6-band resistors • Reverse resistor reading direction • Copy, share, save, and reset results SMD RESISTOR CODES • Decode 3-digit and 4-digit SMD codes • Support R, K, and M notation • Support EIA-96 markings • Handle zero-ohm resistors • Convert resistance values back into suitable SMD codes • Explain decoded values clearly E-SERIES VALUES • Browse E6, E12, E24, E48, E96, and E192 values • Find the nearest standard resistor values • Compare error and tolerance ranges • Open selected values directly in resistor tools CIRCUIT CALCULATORS • Series and parallel resistance • Ohm’s Law • Voltage divider • LED current-limiting resistor • Target resistance combinations • Wheatstone bridge • Op-amp gain • Star / Delta conversion • Wire resistance • Voltage drop • Pull-up / Pull-down resistor • RC time constant LIBRARY WORKFLOW • Save calculation history • Add results to Favorites • Organize values and calculations into Projects • Export project data as CSV, JSON, or plain text • Review saved calculations later BUILT FOR DAILY ELECTRONICS WORK Resistor Calculator is designed to be fast, clear, and focused. Results update immediately as you enter values, and formulas are available when you need to understand how a calculation was made. All core calculations run on your device and the app works without an account or internet connection.