Current from voltage and resistance
Calculate current and resistor dissipation for a DC resistive load. Your inputs stay in this browser tab.
Your result
A little input. A useful result.
Your result will appear here.How to use current from voltage and resistance
Calculate current and resistor dissipation for a DC resistive load. This free tool runs locally after you choose to start.
- Enter your own values, or start with the visible example.
- Adjust voltage (v), resistance (ohms) as needed.
- Choose the action button. Review the result, then copy text or download a file when available.
- Choose Clear all when finished to remove inputs and results from the interface.
Limits, without the small print.
Use consistent units as labeled. Floating-point results are estimates. Ideal DC resistor; no component safety rating is selected.
One job runs at a time. You can cancel it; jobs stop after 30 seconds. Browser and device capabilities affect performance.
Understand the safeguards →What this tool does
Current = V/R; power = V²/R.
Example input
Voltage (V): 12; Resistance (ohms): 1000
Example result
{
"amperes": 0.012,
"watts": 0.144
}A couple of useful answers.
Does current from voltage and resistance upload my data?
No. This tool processes your input in a browser worker. Your text and files are not sent to an application server. The static host receives page and asset requests; see our privacy explanation.
Is this tool free for work and study?
Yes. No account, paid API, usage subscription or watermark fee is required. You remain responsible for your content rights and checking results. Hosting providers and their free tiers are separate from this open-source software.
What should I check before relying on the result?
Use consistent units as labeled. Floating-point results are estimates. Ideal DC resistor; no component safety rating is selected. Review important outputs against the source, especially financial, legal, identity, medical and research calculations.