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Both calculators run independently — change the inputs on either side to compare results.

Physics

Ohm's Law and Power Calculator

Instantly calculate electrical power three ways — P = V·I, P = V²/R, and P = I²·R — using Ohm's Law. Use it to verify circuit designs, select resistors, or compare power expressions.

Fill in the required fields to see your result.
Physics

Decibel Calculator (Power Ratio)

Converts a ratio of two power levels into decibels using 10 × log10(P1 ÷ P2). Decibels express how many times larger or smaller one power is than another on a logarithmic scale used in acoustics, electronics, and signal processing.

Fill in the required fields to see your result.

Key differences

Ohm's Law and Power CalculatorDecibel Calculator (Power Ratio)
CategoryPhysicsPhysics
Inputs required42
ResultResult (units)Level Difference (dB)
What it doesInstantly calculate electrical power three ways — P = V·I, P = V²/R, and P = I²·R — using Ohm's Law. Use it to verify circuit designs, select resistors, or compare power expressions.Converts a ratio of two power levels into decibels using 10 × log10(P1 ÷ P2). Decibels express how many times larger or smaller one power is than another on a logarithmic scale used in acoustics, electronics, and signal processing.