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Trigonometry Calculator
Work out sine, cosine, tangent and their inverses in degrees or radians.
Trigonometric functions
Result: —
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How to use the Trigonometry Calculator
- Pick the trigonometric function you need.
- Choose degrees or radians for the angle.
- Enter the value and read the result instantly.
Features
- Sine, cosine and tangent
- Inverse sine, cosine and tangent
- Degrees or radians
- Runs locally, nothing uploaded
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Frequently Asked Questions
Common questions about the free online trigonometry calculator.
Choose a function, pick degrees or radians, enter the angle, and the value is calculated as
you type.
Sine is opposite over hypotenuse, cosine is adjacent over hypotenuse and tangent is opposite
over adjacent.
The inverses return the angle whose sine, cosine or tangent equals the number you entered in
the box.
Inverse sine and cosine need an input between minus one and one, because those are the limits
of their ranges.
Tangent is undefined at 90 degrees and at every odd multiple of it, and the tool reports that
instead of a huge number.
Values are computed with the browser's own math library and rounded to six decimal
places for readability.
No. Nothing is uploaded and all calculations happen locally in your browser.
Yes. It is completely free with no account, no sign-up and no usage limits at all.
Last updated: October 10, 2026