How do you calculate what a settlement will be?

There is no hard and fast answer--each case depends on its own unique facts--but  as a *rough* rule of thumb, a settlement would usually be around 30% - 60% of the sum (total) of the following:

1) All out-of-pocket (not reimburse or paid by insurance) medical costs, both present and projected future (though projected future costs are themselves "discounted to present value," or reduced by a mathematical formula which accounts for the fact that it's better to get money today then money tomorrow);

2) Lost wages to date, and projected future reduction, if any, in earning potential;

3) Other out-of-pocket costs, to date and projected future (e.g. if due to an injury, a home health aide has to be hired);

4) For injuries causing significant disability, disfigurement, or life impairment which lasts at least several weeks or months, some amount for "pain and suffering" which would commonly range from 1/3 or 1/2 of total (including paid by insurance) medical costs up to, for longer lasting and more serious injuries, 2 or 3 times medical costs.