Compare useful output energy against input energy to get efficiency and the losses.
Efficiency is a simple ratio, but its value lies in the losses it implies. Converting those losses into annual energy and cost is what turns a percentage into a business case for replacement. A few points of efficiency on a continuously running machine is worth more over its life than the difference in purchase price.
Efficiency
Efficiency = useful output ÷ total input × 100
Efficiency = useful output ÷ total input × 100 Efficiency is a simple ratio, but its value lies in the losses it implies. Converting those losses into annual energy and cost is what turns a percentage into a business case for replacement.
A few points of efficiency on a continuously running machine is worth more over its life than the difference in purchase price.
This calculator takes 4 inputs: Energy or power in, Useful energy or power out, Hours of operation per day, Energy price per kWh. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.