The weight of a steer is dependent on multiple factors and can't be determined without taking those factors into consideration. The age, breed, health and diet of the steer can all impact the live weight of the animal.
Because steer are often butchered for meat, they have different measurements of weight. Live weight is what the steer weighs while alive. This weight measurement is utilized when checking the health of the animal and revisited after the animal is processed. Processed weight is what the carcass weighs after slaughter and processing occurs. Packaged weight is what the meat cuts butchered from the carcass weigh after being cut and packaged. These different weight measurements are all important when keeping a steer for meat production.