Calculateur de Resistor Series/Parallel
Calculate total resistance for two resistors in series and in parallel.
Formula and method
This calculator computes Series total, Parallel total directly in your browser without sending data to an external server.
Mathematical formula
- Series total:
r1+r2 - Parallel total:
(r1 × r2) ÷ (r1+r2)
Variables and parameters
- Resistor 1 (r1): default value 100 Ω.
- Resistor 2 (r2): default value 220 Ω.
Some formulas are undefined for certain input combinations (such as division by zero or logarithms of non-positive numbers). In those cases the live tool displays an alert instead of NaN.
Embed this tool
Paste this snippet into your own site or blog post to embed a live, working copy of this tool. It links back to the full page on SpecWhale.
Frequently asked questions
What equation and variables does Resistor Series/Parallel Calculator use?
Resistor Series/Parallel Calculator evaluates outputs such as <strong>Series total, Parallel total</strong> based on inputs including Resistor 1, Resistor 2. Check the Mathematical Method section for the explicit formula.
What happens if I enter invalid or zero values into Resistor Series/Parallel Calculator?
If an input combination is mathematically undefined (such as division by zero or negative square roots), SpecWhale alerts you gracefully rather than returning invalid NaN outputs.
Are my calculations in Resistor Series/Parallel Calculator saved or private?
All calculations are 100% private and run locally in your Web browser. Your numbers are never uploaded to any server, but can be saved locally to your device or exported as CSV/JSON.
Is Resistor Series/Parallel Calculator free to use?
Yes. Resistor Series/Parallel Calculator is completely free, has no usage limit, and does not require an account, email, or API key.
Does Resistor Series/Parallel Calculator store or upload my data?
No. Resistor Series/Parallel Calculator calculates everything locally in your browser. Nothing you type is sent to a server or stored by SpecWhale.
How accurate is Resistor Series/Parallel Calculator?
Resistor Series/Parallel Calculator uses a standard formula (see the Method section above for the exact expression). For high-stakes financial, medical, or legal decisions, confirm the result with a professional or an authoritative source before relying on it.
Can I embed Resistor Series/Parallel Calculator on my own website?
Yes. Use the "Embed this tool" snippet on this page to add a free, working copy of Resistor Series/Parallel Calculator to your own blog post or page.