Household Electrical

Simple online calculators for household electrical calculations

Easy to understand for everyone

These calculators are specially designed for household applications and require no electrical engineering knowledge. Ideal for DIY enthusiasts and homeowners.

Power and Current

Calculate Current

How many amperes flow with known watts and volts?

Calculate Power

How many watts with known current and voltage?

Calculate kVA from Amperes

Apparent power in kVA for house connection

Wiring and Cables

Speaker Wiring

Calculate resistance and losses of speaker cables

About Household Electrical Calculators

These calculators are specifically designed for practical household applications. From simple resistance calculations to measurement range extensions - all important formulas are precisely implemented.

Common Questions

Circuit Breakers: What fuse do I need?
Energy Consumption: How much current does my device draw?
House Connection: Is my connection sufficient?

Typical Device Powers

Kitchen: Refrigerator 150W, Microwave 800W, Stove 7000W
Living: LED TV 100W, PC 300W, Vacuum 1200W
Bathroom: Hair dryer 1800W, Washing machine 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

Important Formulas

Basic Formulas

P [W] = U [V] × I [A]

I [A] = P [W] ÷ U [V]

kVA = (U × I) ÷ 1000

House Connection

Germany: 230V (single-phase)

Germany: 400V (three-phase)

Practical Values

Fuses:
1 kW ≈ 4.3 A (230V)
16A fuse ≈ 3680W max
10A fuse ≈ 2300W max

Power outlets:
Standard outlet: 16A/230V
CEE 16A: 11000W (400V)
Safety margin: +25%