Tan Calculator
Calculate the tangent of an angle in degrees or radians. This page also shows sine and cosine context so undefined tangent cases are easier to understand.
Computes:
tan(θ) = sin(θ) / cos(θ)
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Privacy: calculations run locally in your browser. No inputs are stored or transmitted.
How it works
This calculator converts the angle to radians internally when necessary, then evaluates sine and cosine to compute tangent.
Common values:
tan(0°) = 0,
tan(45°) = 1,
tan(30°) ≈ 0.5774,
tan(60°) ≈ 1.7321
Examples
- 45° → tan = 1
- 30° → tan ≈ 0.5774
- 90° → tangent is undefined
When to use this tool
This tool is designed for quick, practical tasks such as everyday calculations, data formatting, or simple conversions. It is best used when you need fast results without installing software or using complex tools.
When to use
- Quick checks or one-time calculations
- Validating or converting data before using it elsewhere
- Simple tasks that do not require advanced software
When not to use
- Critical financial, legal, or medical decisions
- Large-scale or automated processing
- Situations requiring guaranteed precision beyond basic validation
Always review results before using them in important contexts.
About this tool
This tool helps you perform quick utility operations directly in your browser. It runs entirely in your browser without sending data to a server.
You can use this tool when handling simple tasks without installing additional software. The results should be interpreted as a processed output based on your input data.
FAQ
- What does this tan calculator compute?
It computes the tangent of an angle in either degrees or radians.
- Can I switch between degrees and radians?
Yes. The calculator supports both degree mode and radian mode.
- Why can tangent be undefined?
Tangent is sin(θ) divided by cos(θ), so it is undefined where cos(θ) = 0.
- What are common undefined degree values?
Tangent is undefined at 90°, 270°, and more generally at 90° + 180°k.
- Are calculations stored?
No. Everything runs locally in your browser.