Use the Tv Size Room Calculator to turn your room length into a recommended TV size range, based on the 1.5 to 2.5 viewing guideline.

Use the Tv Size Calculator to find any screen diagonal from its width and height, and identify the true size class of any TV or monitor.

Use the Tv Calculator to turn any screen diagonal into real width, height and viewing area for 16:9 and 4:3 TVs before you buy.

Find any missing interior angle with the Missing Angle Calculator. Enter the number of sides and the sum of the known angles.

Find the third side and type of a triangle with the Triangle Sides Calculator. Enter two sides plus the perimeter to solve side c.

Solve SSA triangles fast with the Triangle Side And Angle Calculator. Enter two sides and one known angle to find the remaining parts.

Use the Triangle Missing Side Calculator to find the hypotenuse or a missing leg of any right triangle from two known sides, fast.

Use this free Triangle Distance Calculator to find the three side lengths and perimeter of a triangle from three points on a grid.

Use this free Triangle Dimension Calculator to find the area, hypotenuse and perimeter of a right triangle from its two legs in seconds.

Use this free Triangle Degree Calculator to find all three angles of any triangle from its side lengths, with worked examples included.