http://www.topendsports.com/testing/tests/sit&reach.htm
Here's a link with the general idea for the sit and reach. I've also seen it where the soles of your feet were the 15 inch mark. If I did the conversion correctly is probably the method your agency will do.
But when a long train of abuses and usurpations, pursuing invariably the same object, evinces a design to reduce them under absolute Despotism, it is their right, it is their duty, to throw off such Government, and to provide new guards for their future security.
Translation for the intellectually challenged: If the government screws the people too much, it is the right and duty of the people to revolt and form a new government.