A time computing device including an actuator mechanism for actuating a timer mechanism, which outputs elapsed time quantity. The actuator mechanism provides selection inputs corresponding to race total distance quantity and split number quantity. A central control mechanism is in communication with the actuator mechanism and sets a split distance increment and performs calculations resulting in a split time, a predicted split time and a predicted race finishing time. The time computing device includes a display mechanism for visually displaying actuator mechanism inputs and computational results. A predictive method is also disclosed.