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Calcimator

Electrical Engineering Suite

Complete electrical calculator — Ohm's Law, voltage drop, resistor color codes, series/parallel circuits, and capacitor calculations for engineers and hobbyists.

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Step 1 of 9

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How to Use This Calculator
  1. Select the calculator mode: Ohm's Law, Voltage Drop, Resistor Color Code, or Series/Parallel.
  2. For Ohm's Law: enter two of voltage (V), current (A), and resistance (R) to find the third.
  3. For Voltage Drop: enter source voltage, current, wire length, and AWG to find the drop.
  4. For Color Code: select band colors to decode resistor value and tolerance.
  5. Review results and use in circuit design, troubleshooting, or electrical coursework.

What each input means

Calculator Mode
Calculation mode to use.
Solve For
The variable to solve for.
Voltage
Electrical potential difference in volts.
Current
Electrical current in amperes.
Resistance
Electrical resistance in ohms.
Power
Power output or consumption.
Wire Gauge (AWG)
Wire gauge (AWG).
Wire Length (one way)
Total length of the wire.
Frequency
Number of cycles per second.

How this is calculated

Formula

V = I × R | P = V × I | Voltage Drop = I × R × Length | Resistor = (Band1×10 + Band2) × Multiplier

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