⚡ Electricity & Solar Unit Converter

This tool lets you instantly convert between electrical and solar energy units including power, energy, voltage, current, resistance, capacitance, frequency, and solar irradiance.
Just enter a value, select the units, and the converter calculates the result in real time.

What This Converter Does

This unit converter simplifies complex electrical and solar engineering calculations by supporting:

Power Units

Convert between W, kW, MW, GW, mW, hp, and BTU/hour.
Useful for appliance ratings, machinery specification, and electrical load calculations.

Energy Units

Instant conversion between Wh, kWh, MWh, J, kJ, MJ, BTU, cal, kcal.
Perfect for energy auditing, consumption analysis, and solar energy calculations.

Voltage Units

Convert V, kV, MV, mV, µV, nV for AC or DC systems.

Current Units

Change values between A, kA, mA, µA, nA, pA for electronics, circuits, and industrial loads.

Resistance Units

Convert Ω, kΩ, MΩ, GΩ, mΩ, µΩ for resistors, wiring, and diagnostic measurements.

Capacitance Units

Convert F, mF, µF, nF, pF with precision for electronic design and troubleshooting.

Frequency Units

Convert Hz, kHz, MHz, GHz, THz, RPM for signal processing and motor applications.

Solar Irradiance Units

Convert W/m², kW/m², BTU/h/ft², cal/cm²/min, langley/min, including STC reference (1000 W/m²).
Used for solar panel sizing, PV energy yield, and peak sun hour calculations.

Formulas Used in the Calculator

Power

• P = V × I

• P = I² × R

• P = V² ÷ R

Energy

• E = P × t

• 1 kWh = 3,600,000 Joules

Current

• I = V ÷ R

• I = P ÷ V

Resistance

• R = V ÷ I

These formulas are applied automatically when you swap between electrical units.

Why Use This Converter?

• Real-time unit conversion

• Supports all major electrical & solar measurement units

• Accurate engineering formulas

• Useful for home energy users, electricians, installers, and engineering professionals

• Web-based tool—no downloads required

Practical Use Cases

Home & Office

• Check appliance wattage and convert watts to kilowatts

• Compare energy usage in Wh or kWh

• Standardize voltage/current values for equipment

Engineering & Electronics

• Convert microamps, milliamps, ohms, microfarads, etc.

• Apply Ohm’s Law to circuit design

• Convert frequency for oscillators and signal components

Solar Applications

• Convert irradiance units (W/m² → BTU/h/ft²)

• Estimate solar panel conditions under STC vs NOCT

• Calculate power & energy parameters for PV systems

Frequently Asked Questions

What units can this converter handle?

It supports all common electrical units (W, kW, V, A, Ω, F, Hz) and solar irradiance units.

Does it work for AC and DC?

Yes — voltage, current, power, and frequency conversions apply to both AC and DC systems.

Can it help with solar panel sizing?

Yes — use irradiance conversions (W/m²) and energy units (Wh, kWh) to estimate PV output.

Is this suitable for engineering students and technicians?

Absolutely. It includes formulas like P=VI and Ohm’s Law, making it ideal for learning and field calculations.