Triangle Calculator
Calculate all triangle properties
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Enter three values (at least one side). Leave unknown fields empty.
How to Use Triangle Calculator
Enter values
Enter 3 known values (sides and/or angles).
Calculate
Get all triangle properties.
Visual
See the triangle drawn to scale.
Why Choose AllTools Triangle Calculator?
- ✓ SSS, SAS, ASA, AAS
- ✓ Area (multiple formulas)
- ✓ Perimeter
- ✓ All angles
- ✓ Height
- ✓ No data stored
Why Use This Tool
- ★ Instant calculations with no server round-trip
- ★ Completely free with no usage limits
- ★ No account or registration required
- ★ Accurate results using standard mathematical formulas
- ★ Works on any device including phones and tablets
Related Resources
Frequently Asked Questions
What combinations of values work? ▼
SSS (3 sides), SAS (2 sides + included angle), ASA (2 angles + included side), AAS (2 angles + 1 side).
What input combinations work? ▼
Enter any valid combination of sides and angles (SSS, SAS, ASA, AAS, SSA) to solve the triangle.
Does this work on mobile? ▼
Yes. All AllTools calculators are fully responsive and work on phones and tablets.
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