Using the calculator
Enter the values requested above. Calculate triangle area, perimeter and selected angle information from side lengths.
FREE CALCULATOR · NO SIGN IN REQUIRED
Triangle Calculator
Calculate triangle area, perimeter and selected angle information from side lengths.
Enter the values for the problem
Enter the numbers, equation values, scores, or dimensions requested by the triangle tool. Review the supporting outputs to check the result and understand the relationship between the values.
Important: Use the inputs that match your situation. Results are estimates based on the values and assumptions entered.
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How to use this calculator
Reading the result
The result shows the geometric value produced by the dimensions or coordinates entered. Supporting results provide the related measurements calculated from the same inputs.
Results are estimates based on the values entered. Review the Methodology and Calculator Disclaimer for important limitations.