Car Audio
Calculator

Ohm's Law Crossover Frequency Unit Converter

Choose your calculator

Resistance Calculator

Ohm's & Watt's Law

Crossover Frequency

Unit Converter

Ohm's & Watt's Law Solver

Enter any two known values and the calculator will solve for the other two. Use this to find power at a given impedance, calculate required voltage for a target wattage, or verify your amplifier wiring.

I know:

Formulas in use P = E × I · R = E / I

Voltage (E) volts

Current (I) amperes

Resistance (R) ohms

Power (P) watts

Results

Crossover Frequency Calculator

Calculate crossover component values from a target frequency, or find the crossover frequency from known component values. Supports 6dB (first-order) and 12dB Butterworth (second-order) designs. See the Speaker Formulas reference for the underlying equations.

Filter order:

Filter type:

Solve for:

Formula in use C = 0.159 / (Z × F)

Speaker Impedance ohms

Target Frequency Hz

Capacitor Value µF

Results

Unit Converter

Convert between measurement units used in speaker design — length for driver dimensions, area for cone surface area, and volume for enclosure sizing.

Category:

From

›

Conversion factor Select units above

Resistance Calculator

Calculate the total impedance of multiple speakers or subwoofers wired together. Add up to 10 drivers and switch between parallel and series wiring to find what your amplifier will see. For the formulas behind this calculator, see the Speaker Formulas reference.

Wiring method:

Formula in use 1/R_T = 1/R1 + 1/R2 + ... + 1/Rn

Results