Efficiency Calculator

Find efficiency from useful output and total input.

Efficiency (%) 75

Energy lost 250

Formula: efficiency = output ÷ input × 100

Step-by-step with your numbers:

1. Values used:

2. Useful output = 750

3. Total input = 1,000

5. Efficiency = 75%

6. Energy lost = 250

Did we solve your problem today?

Efficiency is the share of input energy that becomes useful output.

The math behind it

efficiency = useful output ÷ total input × 100. The rest is lost (usually as heat).

750 of 1000 → 75%.

Over 100%?

Impossible — it would violate energy conservation.