Electricity Usage and Measurement
Energy Efficiency Savings Calculator
Calculate annual energy savings from baseline energy and reduction. The default values illustrate the workflow; replace them with measurements or ratings from one documented condition.
Inputs for this calculation
Replace the examples with values from the same case.
Understanding the equation
This page evaluates savings = baseline × reduction. Only Baseline energy and Reduction enter the numerical result.
The defaults produce 10,800.00 kWh. Replace them with measurements from one operating state.
Calculate annual energy savings from baseline energy and reduction. Keep Standby Power Cost Calculator available for the companion calculation.
How to use the result
Read Annual energy savings as the outcome of this equation, not as automatic equipment approval. Compare it with the relevant tariff and measured load profile.
Keep the input set beside the output so another reader can reproduce it. The estimated power after speed reduction step is handled by VFD Energy Savings Calculator.
Values this page needs
Record meter scaling, time period, load profile, and applicable tariff. A source note beside each entry makes the result reproducible.
Confirm decimal placement whenever a source uses a different unit scale. For the companion annual energy saved calculation, open Occupancy Sensor Savings Calculator.
- Baseline energy
- Default example: 60000 kWh. Enter baseline energy in kWh.
- Reduction
- Default example: 18%. Enter reduction in %.
Practical limits
Normalize baseline and post-project conditions.
The simple equation may need adjustment for fixed charges, demand ratchets, seasonal rates, uncertainty, and future load change. Resolve material omissions before selecting a standard size or rating.
Separate real power, apparent power, energy, and demand before entering values.
Documenting the calculation
Document baseline energy and reduction with annual energy savings. Keep enough context to reproduce the result later.
Transfer annual energy savings without rounding when it becomes another input. Apply standard sizes only after all checks are complete.
Before relying on the answer
What should I verify beyond the displayed inputs?
Normalize baseline and post-project conditions. Also consider idle consumption, load variability, tariff changes, and maintenance downtime.
Why might a second instrument give another answer?
Recheck units and operating state before investigating fixed charges, demand ratchets, seasonal rates, uncertainty, and future load change.
Can I change several inputs at once?
Keep unaffected entries fixed so the cause of the difference remains visible. Separate real power, apparent power, energy, and demand before entering values.
Can I select equipment from this number alone?
No. Compare the value with the relevant tariff and measured load profile and apply relevant equipment and installation requirements.
Why does Annual energy savings show several decimals?
Do not round between dependent calculations. Match the final display to the precision of the source data.