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免费 Ohm's Law Calculator
Enter any two of voltage, current, resistance, and power — the other two are solved instantly using Ohm's law (V=IR) and the power equation (P=VI).
Runs in your browserNo sign-up, no pop-ups无需登录永久免费
V
A
Ω
W
Enter any two values and the other two are solved automatically
💡 Ohm's law: V = I × R. Power adds P = V × I. Knowing any two lets you derive the rest — handy for sizing resistors, checking LED current, or working out heat dissipation.
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工作原理
1
输入
输入你的文本或数据。
2
处理
在你的浏览器中即时处理。无服务器，无等待。
3
下载
保存你的结果。不存储任何内容。
为什么选择我们的？
✓Completely free — no hidden costs, ever
✓No account, email, or login required
✓Runs entirely in your browser — no uploads
✓Works on any device — phone, tablet, desktop
✓Open and ad-supported, with no tracking
✓Loads fast, with no installation needed
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