Máy tính điện

Calculate power, voltage, current, resistance, energy, and cost using Ohm's law. Get step-by-step solutions with interactive charts.

Tính toán

Select a calculation type, enter your values, and click Calculate to see results with step-by-step solutions.

Hướng dẫn sử dụng hoàn chỉnh

What is This Calculator?

This electricity calculator uses Ohm's law and power formulas to calculate power, voltage, current, resistance, energy consumption, and electricity cost. It is designed for electrical engineers, students, electricians, and anyone working with electrical circuits.

Ohm's Law & Power Formulas

V = I × R  |  P = V × I  |  P = V² / R  |  P = I² × R

E = P × t  |  Trị giá = E × Tỷ lệ

6 Calculation Types

Quyền lực

P = V × I, P = V 2 / R, P = I 2 × R

Điện áp

V = P / I, V = I × R, V = √(P × R)

Hiện hành

I = P/V, I = V/R, I = √(P/R)

Sức chống cự

R = V/I, R = V2/P, R = P/I2

Năng lượng

E = P × t (hỗ trợ giây, phút, giờ, ngày)

Trị giá

Cost = Energy × Rate per kWh

Cách sử dụng

  1. Select a calculation type (Power, Voltage, Current, Resistance, Energy, or Cost).
  2. Choose the formula method based on the values you know.
  3. Enter your values and select appropriate units.
  4. Click Calculate to get results with step-by-step solutions and charts.

Ghi chú quan trọng

  • All input values must be positive numbers.
  • Resistance and divisor values must be greater than zero.
  • Chuyển đổi đơn vị được xử lý tự động.

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