Depends how good you are at growing tbh. Whether you can keep temps/humidity within optimal ranges, how well you can keep ph and nutrient concentrations at optimum levels, how much veg time you give it, if/how you train it, the list goes on. There are so many factors to consider it is almost impossible to give even a vague estimate with any degree of accuracy.
The nearest thing to a rule of thumb I've come across is that a good grower can achieve 1g/w of lighting, and 0.5g/w is good for a first time, but nothing is set in stone.