Triangle Calculator
Triangle Calculator is free to use. Enter your figures below and the result updates as you type. Use it for planning; it is an estimate, not advice.
About the Triangle Calculator
Heron's formula: Area = √[s(s − a)(s − b)(s − c)], where s is half the perimeter. Angles come from the law of cosines.
The three sides must satisfy the triangle inequality: each pair must add up to more than the third side.
How to use the Triangle Calculator
- Enter each figure in the boxes above, using the same currency and time units.
- The result updates as you type. Press Calculate to refresh it at any time.
- Change one figure at a time to see how much it moves the result.
Frequently asked questions
What is the Triangle Calculator used for?
The three sides must satisfy the triangle inequality: each pair must add up to more than the third side.
How accurate is the Triangle Calculator?
It applies standard formulas to the figures you enter. Real results depend on actual rates, fees, taxes and timing, so treat the output as an estimate and confirm with your bank or adviser.
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