This calculator helps you figure out multiple dimensions of a triangle based on triangle's base and pitch. It's very useful for shed roof calculations: you can figure out the pitch and pitch height based on the base and angle and vise-versus: changing the pitch will change the angle accordingly. The percent grade / slope also calculates automatically and fires changes in the other measures when changed.
The roof pitch should be between 1 and 12 and the roof angle can't be sharper than 45° for obvious reasons. The diagram below will redraw automatically when you change any of the values in the form.