What formula powers the Electrical Energy Consumption (kWh) & Monthly Bill Calculator?

kWh = (Watts × Hours) / 1000 — Compute daily, monthly, and annual kilowatt-hour consumption and electricity cost from appliance wattage.

Power & Battery Calculators

Electrical Energy Consumption (kWh) & Monthly Bill Calculator

Compute daily, monthly, and annual kilowatt-hour consumption and electricity cost from appliance wattage.

Compute daily, monthly, and annual kilowatt-hour consumption and electricity cost from appliance wattage.

Electronics Calculators

Interactive visual 4-band and 5-band resistor color decoder showing live painted resistor bands, exact resistance, and min/max tolerance range.

R_4band = (10·D₁ + D₂) × Multiplier ± Tolerance%

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Electronics Calculators

Calculate exact and nearest standard E12 current-limiting resistor values and power ratings for single or series LED strings.

R = (Vs − N × Vf) / I_LED, P_R = (Vs − N × Vf) × I_LED

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Electronics Calculators

Instantaneous solver for electric current, power dissipation in watts, conductance in siemens, and hourly energy consumption.

I = V / R, P = V × I = I²R = V² / R

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Electronics Calculators

Compute divided output voltage Vout, decibel attenuation, bleeder current, and Thevenin equivalent output resistance Rth.

Vout = Vin × R₂ / (R₁ + R₂), Rth = (R₁ × R₂) / (R₁ + R₂)

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Electronics Calculators

Compute exact parallel and series equivalent resistance for two or three resistor combinations simultaneously.

1 / R_parallel = 1/R₁ + 1/R₂ + 1/R₃, R_series = R₁ + R₂ + R₃

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Electronics Calculators

Calculate total capacitance for parallel banks and series strings along with stored coulombs Q and electrostatic energy.

C_parallel = C₁ + C₂, C_series = (C₁ × C₂) / (C₁ + C₂)

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