Power Conversion

Common Power Formulas

P = V × I (Power = Voltage × Current)
P = I² × R (Power = Current² × Resistance)
P = V² / R (Power = Voltage² / Resistance)

Energy Conversion

Energy Relationships

E = P × t (Energy = Power × Time)
1 kWh = 3,600,000 J = 3.6 MJ
1 BTU = 1055.06 J

Voltage Conversion

Household

120V (US), 230V (EU)

High Voltage

69kV – 800kV (Transmission)

Electronics

3.3V, 5V, 12V (Logic levels)

Current Conversion

Ohm’s Law

I = V / R (Current = Voltage / Resistance)
I = P / V (Current = Power / Voltage)

Resistance Conversion

Resistance Formulas

R = V / I (Resistance = Voltage / Current)
R = ρ × (L / A) (Resistance = Resistivity × Length / Area)

Capacitance Conversion

Capacitance Formulas

C = Q / V (Capacitance = Charge / Voltage)
Energy = ½ × C × V²

Frequency Conversion

AC Power

50Hz (EU), 60Hz (US)

Radio

AM: 540-1600 kHz
FM: 88-108 MHz

WiFi

2.4 GHz, 5 GHz

Solar Irradiance & Energy

Standard Test

1000 W/m² (STC)

Typical Sunlight

200-1200 W/m²

Peak Sun Hours

Daily kWh/m² ÷ 1 kW/m²

 Electricity & Solar Unit Converter – Free Online Electrical Calculator

Instantly Convert Power, Energy, Voltage, Current, Resistance & Solar Irradiance Units

Looking for a fast and accurate way to convert electrical and solar units?
Our Electricity & Solar Unit Converter lets you seamlessly switch between Watts, Volts, Amps, Ohms, kWh, Horsepower, and even Solar Irradiance (W/m²) — all in one tool.

Whether you’re a solar installer, electrical engineer, technician, or just curious about your electricity usage, this tool delivers precise results in seconds.

 What Can You Convert?

Our tool covers six major electrical categories:

Category Units Supported
Power Watt (W), Kilowatt (kW), Megawatt (MW), Horsepower (HP)
Energy Watt-hour (Wh), Kilowatt-hour (kWh)
Voltage Volt (V), Millivolt (mV), Kilovolt (kV)
Current Ampere (A), Milliampere (mA)
Resistance Ohm (Ω)
Irradiance Watt per square meter (W/m²)

Each category is organized in a dedicated tab — simply enter a value, choose your units, and convert.

Why Use an Electricity Unit Converter?

Electric systems use a mix of metric and imperial units, making calculations difficult without the right tools.
With our converter, you can:

  • 🔌 Compare solar panel ratings (W vs kW vs HP)

  • 💡 Calculate appliance energy use

  • ⚡ Check voltage drops or circuit values

  • 🔋 Understand battery sizing

  • ☀️ Analyze solar irradiance for PV output

 How It Works (Examples)

1. Power Conversion:
Convert 5 kW to Horsepower → Output: 5 kW = 6.705 HP

2. Energy Conversion:
Convert 2000 Wh to kWh → Output: 2000 Wh = 2 kWh

3. Voltage Conversion:
Convert 5000 mV to Volts → Output: 5000 mV = 5 V

4. Current Conversion:
Convert 1.5 A to mA → Output: 1.5 A = 1500 mA

Who Should Use This Tool?

This calculator is ideal for:

  • Solar Installers – to match solar output, battery specs, and inverter capacity

  • Electricians – for accurate field conversions

  • Engineering Students – for quick learning and assignments

  • DIY Enthusiasts – for checking energy use or solar system size

Future Upgrades (Coming Soon)

  • Ohm’s Law Calculator (V = IR)

  • Battery & Inverter Sizing Tool

  • Solar Panel Spacing & Tilt Estimator

  • Add kΩ, MΩ, µA, and μV units

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This tool is web-based, fast, and optimized for mobile users.
Built with electrical accuracy and real-world use cases in mind.

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Start Converting Now

Go to the top, choose a category, enter your value, select units — and convert instantly.

It’s simple, fast, and designed by electrical professionals.