I measured my current one again, its old carpet and a toddle loose so its not possible to get accurate measurements, however the stairs vary between 260-264mm (inc nosing) going and 182-188mm rise, (bottom and 1st step from qt landing are 193mm) the big difference between this and the one i plan to build is the current one is carpeted therefore i think its a soft landing whereas the new one will be wood, I am not sure if this makes a difference and if i should therefore lower each a few mm?
The top stair is 190mm, no 1 has ever tripped (since i replaced the carpet on the landing (increasing the height) ~9 months ago) maybe because there is a visual difference (see image)
the other issue i found is when measuring at first I did not really pay attention to the nosing as the carpet on the rise looked like its only a few mm in from the top small enough to be ignored, however now that i measured nosing to nosing i found that my nosing is around 22mm giving me an actual going of 242mm vs what i thought before to be 264mm.
according to the calculator if i were to use the nose to nose measurement at 242mm and rise at 189.5 it will result and a 38.1 degree, i cannot use the same for the new steps as total rise will be slightly more, to achieve 38.1 degrees I can use 244 going (no nosing) and 191.1 rise (R*2+G=626.2) th4 going will be very close to the current only the rise will be more, not sure if going with a rise of 191.1mm will be comfortable.
Thank you all once again for your amazing help.