Series Circuit Solver
Solve I = V / (R₁ + R₂), V_n = I·R_n step by step — free series circuit solver with worked examples, real-world defaults and instant answers.
Series circuit — current and per-resistor voltages.
About Series Circuit Solver
The Series Circuit Solver solves I = V / (R₁ + R₂), V_n = I·R_n for you with the full working shown — every substitution, every unit, every step, exactly the way a good teacher writes it on the board. Series rules in one circuit: one shared current, voltages divide pro-rata (R₂ gets twice R₁'s share here), and the totals always reconcile — Kirchhoff's voltage law is just energy conservation wearing circuit clothes.
How to use Series Circuit Solver
- 1Enter your known values in the input fields (sensible real-world defaults are pre-filled).
- 2The tool substitutes them into I = V / (R₁ + R₂), V_n = I·R_n and recomputes live.
- 3Read the answer in the result box, then expand the step-by-step solution to see the full working.
- 4Copy the method into your notebook, or change inputs to explore how the result behaves.
Why use Series Circuit Solver?
- ✓Solves I = V / (R₁ + R₂), V_n = I·R_n instantly as you type — no submit button, no waiting
- ✓Step-by-step solution shown for every calculation, not just the final answer
- ✓Realistic example values pre-loaded so you can see a worked example immediately
- ✓100% free, no sign-up, runs entirely in your browser — your numbers never leave your device
- ✓Mobile-friendly and fast enough to use mid-homework or mid-lesson
Frequently asked questions
What formula does the Series Circuit Solver use?+
It uses I = V / (R₁ + R₂), V_n = I·R_n. The steps section shows the formula with your actual numbers substituted, so you can follow (and verify) every stage of the calculation rather than trusting a black box.
What should I keep in mind when using this calculator?+
Series rules in one circuit: one shared current, voltages divide pro-rata (R₂ gets twice R₁'s share here), and the totals always reconcile — Kirchhoff's voltage law is just energy conservation wearing circuit clothes. This proportional splitting IS the voltage divider behind every volume knob and sensor circuit.
Is the Series Circuit Solver free to use?+
Completely free, with no sign-up or limits. All computation happens client-side in your browser, so it is fast, private, and works even on slow connections once the page has loaded.
Can I use this for homework, teaching or exam prep?+
That is exactly what it is built for. The step-by-step working mirrors how solutions are presented in class, so you can check homework, build worked examples for teaching, or practise method recall before exams.
Embed Series Circuit Solver on your website
Want Series Circuit Solveron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
<iframe src="https://tooljolt.com/tools/series-circuit-solver" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="Series Circuit Solver — ToolJolt" loading="lazy"></iframe>Related Science tools
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