I recently brewed a few batches using an excel worksheet, a "mash calculator" if you will.
only need to enter the data concerning batch size, temperatures of grain, desired mash temp, etc. It calculates the water usage and loss from evaporation and tubing loss, also calculate adjuncts and step mash, etc.
In a word: an incredible tool!
one drawback: the one I have isn't accurate!!!
Any of you have an accurate and reliable worksheet download link?