Volts to Watts Calculator
Instantly convert volts to watts using this free online calculator. Supports DC, single-phase, and three-phase AC with formula, examples, and table.
Quick Intro: Convert Volts to Watts
To convert volts to watts, you need to know the current (amperes) and power factor (for AC). The formula varies based on the type of circuit—DC, single-phase AC, or three-phase AC. This calculator simplifies those calculations for you.
Formula & Table Summary:
Id = Is * (exp( Vd / (n * Vt) ) - 1) Vt = k * T / q (≈25.85 mV at 300 K)
Inputs: Vd (V), Is (A), n (1–2), T (K). Output: Id (A).
diode current calculator
Input the diode voltage ( V d ), saturation current ( Is ), ideality factor ( n ) and temperature ( T ) to calculate diode current based on the Shockley equation. When used as a junction diode, also includes the effects of reverse leakage and series-resistance effects as parametric variations.This Diode Current Calculator solves a diode junction voltage (Vd) to diode current (Id) using the Shockley diode equation and approximate practical piecewise versions. Circuit analysis, bias calculation and fast leakage/or forward conduction estimates can be done with this tool. Warning: exponentials which are extremely large can be numerically unstable; usually bound by voltage range or logarithmic processing in use. When it comes to power dissipation, the product of returned Id and Vd is the diode dissipation (W).
semiconductor diode current
| Vd (V) | Is (A) | n | T (K) | Id (A) |
|---|---|---|---|---|
| 0.0 | 1e-12 | 1.0 | 300 | -1.00e-12 |
| 0.2 | 1e-12 | 1.0 | 300 | 3.27e-05 |
| 0.6 | 1e-12 | 1.5 | 300 | 0.0112 |
| 0.7 | 5e-12 | 1.2 | 300 | 0.128 |
| -5.0 | 1e-12 | 1.0 | 300 | -1.00e-12 |
Frequently Asked Questions - Volts to Watts Calculator:
How do I convert volts to watts?
Multiply volts by amps. For AC, also multiply by the power factor and √3 for 3-phase.
What is the formula for volts to watts (DC)?
Watts = Volts × Amps.
Do I need power factor for DC calculations?
No, power factor is only used in AC circuits.
What is power factor?
It’s a number (0–1) that shows how efficiently electrical power is used in AC circuits.
How do I convert volts to watts in a single-phase AC system?
Use Watts = Volts × Amps × Power Factor.
How do I convert volts to watts in a three-phase system?
Use Watts = √3 × Volts × Amps × PF.
Can this calculator handle three-phase power?
Yes, it supports DC, single-phase, and three-phase systems.
What is √3 in the formula?
√3 ≈ 1.732, used in 3-phase AC power calculations.
Can I use this for household appliances?
Yes, especially for calculating power usage based on voltage and current.
Is this tool useful for solar panel sizing?
Yes, it's helpful when calculating wattage output based on system voltage and current.
