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Vector Calculator — Free Online Calculator

Vector Calculator solves Dot: a·b = |a||b|cos(θ). Cross: a×b = |a||b|sin(θ)n̂ — dot product returns a scalar related to how aligned two vectors are; cross product returns a vector perpendicular to both. Enter your known values and the calculator solves for the rest instantly. All processing happens client-side in your browser, with nothing sent to a server. Free, unlimited, and no registration needed.

How to use Vector Calc

1. Enter your known values in the fields.
2. The result updates instantly as you type.
3. Copy or note down the result.

Frequently asked questions

What formula does Vector Calculator use?

Dot: a·b = |a||b|cos(θ). Cross: a×b = |a||b|sin(θ)n̂ — dot product returns a scalar related to how aligned two vectors are; cross product returns a vector perpendicular to both.

Can I use it on my phone?

Yes. The layout adapts to small screens and behaves the same on mobile as on desktop.

Is my input saved anywhere?

No. Values stay in your browser and are gone as soon as you close the tab.

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