Electrical
Electrical Energy Cost Calculator
Build a multi-load energy and cost estimate with quantity, hours and duty cycle. Compare SI/US results and review the method, assumptions and related references below.
Change any input to update the calculation. Unit changes preserve the physical quantity.
Inputs
Your local currency; excludes taxes, standing charges and demand tariffs.
Loads
1 / 50 rows · each row keeps its own units
Calculated locally in your browser. No sign-up or input upload.
Results
Daily energy
4 kWhPeriod energy
120 kWh365-day scenario energy
1,460 kWhPeriod energy cost
24 local currency365-day scenario cost
292 local currencyConnected nameplate power
1 kWCalculation breakdown
- Example
- 4 kWh/day
Assumptions & checks
An operating scenario, not a meter reading or tariff forecast. Connected power is not simultaneous demand; annual results repeat the daily scenario for 365 days.
Formula
Build a multi-load energy and cost estimate with quantity, hours and duty cycle
Worked example
Using the default values shown in the calculator, the same formula gives the following result. This is a quick sanity check for the calculation, not a design recommendation.
Inputs
- Billing / planning days
- 30
- Energy price per kWh
- 0.2
- Row 1 · Name / label
- Example
- Row 1 · Real input power
- 1000 W
- Row 1 · Identical loads
- 1
- Row 1 · Hours per day
- 4
- Row 1 · Average duty fraction
- 100
Result
- Daily energy
- 4 kWh
- Period energy
- 120 kWh
- 365-day scenario energy
- 1,460 kWh
- Period energy cost
- 24 local currency
- 365-day scenario cost
- 292 local currency
- Connected nameplate power
- 1 kW
Related calculators
Continue your workflow with a related calculation.
Electrical
Electrical Power Calculator
Solve electrical input power, current or supply voltage for DC and balanced AC loads. SI/US units, clear methods and related references.
Electrical
Battery Runtime Calculator
Estimate battery runtime or required amp-hour capacity for a constant load. SI/US units, clear methods and related references.
HVAC & Energy
Heat Pump Running Cost Calculator
Estimate heat-pump kWh, annual and average monthly running cost from heat demand or runtime, editable COP/SCOP, tariff and auxiliary electricity.
Technical references for this calculation
Frequently asked questions
What does this result tell me?
An operating scenario, not a meter reading or tariff forecast. Connected power is not simultaneous demand; annual results repeat the daily scenario for 365 days.
How can I check the calculation?
Worked example: One 1 kW load at 4 h/day and 100% duty uses 4 kWh/day, 120 kWh in 30 days; tariff 0.20 gives 24.00. Review each stated input and unit; use project-specific values rather than treating the editable example as a requirement.
Reference data & method sources
- NIST SI conversion factors
SI/US dimensional conversions. Geometry and energy balances are stated explicitly, not attributed to a design standard.