Household Electrical

Simple online calculators for household electrical - calculate watts, amperes, power without technical expertise

Easy to understand for everyone

These calculators are specially designed for household applications and require no electrical engineering knowledge. Simply enter the known values and read the result - ideal for DIY enthusiasts and homeowners.

Power and Current

Calculate Current

How many amperes flow with known power (watts) and voltage (volts)?

Calculate Power

How many watts does a device consume with known current and voltage?

Calculate kVA from Amperes

Apparent power in kVA from current and voltage for house connection

Wiring and Cables

Speaker Wiring

Calculate resistance and losses of speaker cables

Typical Household Calculations

Common Questions

🔌 Circuit Breakers:

"What fuse do I need for my new outlet?"

→ Use current calculator

💡 Energy Consumption:

"How much current does my new device draw?"

→ Use power calculator

🏠 House Connection:

"Is my house connection sufficient for all devices?"

→ Use kVA calculator

Typical Device Powers

Kitchen:

Refrigerator: 150W Microwave: 800W Stove: 7000W Coffee maker: 1000W

Living area:

LED TV: 100W Stereo system: 50W PC: 300W Vacuum cleaner: 1200W

Bathroom:

Hair dryer: 1800W Washing machine: 2000W Fan heater: 2000W

Safety Notes

Electrical work should only be performed by qualified professionals
These calculators serve only as rough orientation
When in doubt, always consult an electrician
Follow safety regulations and electrical codes

Most Important Household Formulas

Basic Formulas

Power = Voltage × Current

P [Watts] = U [Volts] × I [Amperes]

Current = Power ÷ Voltage

I [A] = P [W] ÷ U [V]

House Connection

Germany: 230V (single-phase)

Germany: 400V (three-phase)

Fuse = Current + 25%

kVA = (U × I) ÷ 1000

Practical Values

1 kW ≈ 4.3 Amperes (230V)

16A fuse ≈ 3680W max

10A fuse ≈ 2300W max

CEE outlet 16A ≈ 11000W (400V)