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For Researchers · Newton's Method

Newton's Method for a loan payoff

Built for researchers prototyping or validating an idea. Prototype fast, reproduce exactly, and share a citable, interactive version of your model. Simulate a loan payoff live below — adjust the inputs and watch it respond, right in your browser.

Newton's Method VisualizerLive

root finding · tangent iterations

Controls

f(x)

Newton's method slides down each tangent line to the x-axis, homing in on a root.

Presets

Start x₀

▶ Run in Python

Data Inspector

Root2.094551

Iterations6

Convergencequadratic

Governing equation

x_{n + 1} = x_{n} - \frac{f ( x _{n} )}{f ^{'} ( x _{n} )}, x_{0} = 3, x_{⋆} \approx 2.0946

Reading this result: Starting at x0 = 3, Newton reached x ≈ 2.094551 in 6 steps. This is a simple root where f'(x) is well away from zero, so the error roughly squares each step (quadratic convergence) — the number of correct digits doubles per iteration.

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Frequently asked questions

Is this good for researchers?: Yes — this version of "Newton's Method for a loan payoff" is framed for researchers prototyping or validating an idea. Prototype fast, reproduce exactly, and share a citable, interactive version of your model.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.