I have had a go at measuring my fluid intake and urine passed. the measures are in ml.
fluid intake - 1300ml
urine - 1375ml
Thank you very much. This is a normal result; you take in some more water with your food and loose a bit more by perspiration. Fluid intake and urine amount shuld not differ more than 200 ml; this is the fact in your case. Since you do not lose more than normal or expected, you might have a problem with your veins or heart. The fluid might be collected in your legs in (invisible) edema. When you lift up your legs while sleeping, the fluid can float back and be filtered by your kidneys. It will be helpful to avoid standing too much and to elevate your legs while sitting. Please have your veins tested and your heart (heart failure patients have the same problem). I wish you all the best!