Angela, there's some study that suggests 8-10g of carbohydrate per kilo of bodyweight. So if you're 70kg, that'd be up 560-700g. If you cut out most of the protein and fat (also helps optimal carb loading), then that's most of your daily intake with a light training load - 2240-2800 calories per day.
Remember to drink lots of water - that's needed to load the carbs into your muscles. Also, note that you will put weight on if you do this properly. Each gram of carbs will bind up to 4g of water with it, so a full carb load could add 3.5kg from a depleted state, with the above person. In reality, you're probably starting the week half-loaded, so you'll not need to do as much as suggested by this research.
Quick solution: eat to hunger. Eat often. Eat carbs. Our bodies are smarter than we realise.