Graphing calculator

Plot a function, adjust the window and inspect a value.

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Graph functions online processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

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Function y =

At x = 1, y = 1

Answer precision

Decimal places

Rounding changes the displayed answer, not the calculation. Downloaded CSV points keep their full calculated precision.

Window, trace and examples

Minimum xMaximum xMinimum yMaximum yInspect at x

Use * for multiplication, ^ for powers, and parentheses around function inputs. Functions include sin, cos, tan, sqrt, abs, ln, log and exp. Angles are in radians. Gaps can indicate values outside the window or undefined values.

Scratch calculator

Check another calculation

Use +, −, ×, ÷, parentheses and %. A percentage is divided by 100. This does not change the main tool.

Reset reloads the tool with its starting values and releases open files and device controls. Saved drafts stay on this device until you delete them.

Links include your inputs and settings. Anyone with the link can see them, so leave out private text. Files and generated results are left out; random draws run again.

Keyboard shortcuts

Updated 2026-09-26

Using Graph functions online

Plot y = f(x) by evaluating the expression at regularly spaced x values. Use powers, parentheses and scientific functions; trigonometry uses radians.

A sampled curve is an approximation, not symbolic analysis. Discontinuities and narrow features can be missed; zoom and inspect values. No roots, extrema or intersections are asserted from pixels.

Next: Fraction calculator

A worked example

With function of x = x^2, the value is 1.

Next: Basic calculator

Next: Integral calculator

Before you use the result

A sampled curve is an approximation, not symbolic analysis. Discontinuities and narrow features can be missed; zoom and inspect values. No roots, extrema or intersections are asserted from pixels.

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ToolOctopus. “Graphing calculator.” Updated 2026-09-26. https://tooloctopus.com/graphing-calculator.

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