UOM Converter
Energy cost
What a load costs to run, and what a retrofit saves.
Try an example
Convert from
More optionsDays per year 365
1,500 W for 8 h a day, 365 days a year
Cost
Energy
How it's calculated
- kWh = watts × hours ÷ 1,000.
- Cost = kWh × rate. Per month = per year ÷ 12.
Worked examples
1,500 W for 8 h a day, 365 days a year
- Per year: $657.00
- Per month: $54.75
- Per day: $1.80
- Per year: 4,380 kWh
- Per day: 12 kWh
400 W for 12 h a day, 365 days a year
- Money per year: $164.25
- Energy per year: 1,095 kWh
- Per year: $262.80
- Per month: $21.90
- Per day: $0.72
2,000 W for 11 h a day, 365 days a year
- Per year: $1,204.50
- Per month: $100.375
- Per day: $3.30
- Per year: 8,030 kWh
- Per day: 22 kWh
More in Electrical
kVA · kW · ampsTransformer, generator and UPS sizing. Three-phase uses line-to-line volts.- Voltage dropVoltage drop on a run, and the smallest wire that keeps it within your target.
- Power factor correctionCapacitor kvar needed to raise a load's power factor, and what it does to kVA and current.
- Transformer fault currentFull-load current and the maximum fault current at a transformer's secondary terminals, from kVA and nameplate impedance.
- Motor speed & slipSynchronous speed from frequency and poles, slip from the nameplate speed, and the same motor on the other frequency.
- Line ↔ neutral voltageThree-phase wye systems: line-to-neutral = line-to-line ÷ √3.
- Ohm's lawEnter any two of volts, amps, ohms and watts to get the other two.