Triangular Number Calculator

The Triangular Number Calculator can calculate if a number is a triangular number so you can use its objects or dots to make an equilateral triangle.

Please enter a number below to determine if your number is a triangular number:

Here are some examples of what our Triangular Number Calculator can explain and answer for you.

Is 121 a triangular number?

Is 110 a triangular number?

Is 100 a triangular number?

Is 196 a triangular number?

Is 12 a triangular number?

Is 16 a triangular number?

Is 15 a triangular number?

Is 17 a triangular number?

Is 21 a triangular number?

Is 210 a triangular number?

Is 24 a triangular number?

Is 28 a triangular number?