The stretch cost of 100 W for 05:00:00, 30 days, at 0.150.

The stretch energy for the same inputs.

The daily run after adding 30 minutes. The cost becomes 2.475.

The stretch cost of a 1000 W air conditioner for 04:00:00.

Home Electricity cost

Electricity cost

Press Time ＋ 30 min, Days ＋ 1, Price ＋ 0.010, Air conditioner, or Kettle. 100 W for 05:00:00, 30 days, at 0.150 is 2.250.

Change watts, the daily run, the days, the price, and how many. Press Time ＋ 30 min, Days ＋ 1, Price ＋ 0.010, Air conditioner, or Kettle and the large number, such as 2.250, changes at once.

Watts W

Hours Minutes

Days

Price per kWh

How many

Cost over this stretch

2.250

2.250 · 15.000 · 05:00:00

Stretch energy: 15.000
Daily run: 05:00:00
One day: 0.075
Twelve times: 27.000

Day · stretch · twelve times

One day	0.500	0.075
This stretch	15.000	2.250
Twelve times	180.000	27.000

At a glance

2.250: The cost of the stretch.
15.000: The energy of the stretch.
05:00:00: The daily run.
2.475: The cost after 30 more minutes.
18.000: The air conditioner’s cost.
1.350: The kettle’s cost.

A 100 W load running 05:00:00 a day for 30 days at 0.150 per kWh uses 0.500 kWh a day and 15.000 kWh over that stretch, costing 0.075 a day and 2.250 over the stretch. Twelve such stretches use 180.000 kWh and cost 27.000. The run fills 20.83% of a day. Adding 30 minutes makes 05:30:00, 16.500 kWh and 2.475, filling 22.92% of the day. A 31st day makes 15.500 kWh and 2.325. A price of 0.160 makes 2.400. A 60 W laptop for 08:00:00 uses 14.400 kWh and costs 2.160. A 1000 W air conditioner for 04:00:00 uses 120.000 kWh and costs 18.000. A 1500 W kettle for 00:12:00 uses 0.300 kWh a day, 9.000 kWh over the stretch, and costs 1.350. Two of the 100 W loads use 30.000 kWh and cost 4.500.

Why this exists

The fuel page looks at a car. This page turns a nameplate wattage and a daily run into energy and cost.

100 W for 05:00:00, 30 days, at 0.150 per kWh is 15.000 kWh and 2.250. A standing charge and tax stay out unless you fold them into the price.

01How to use it

Press Watts ± 10 W, Time ± 30 min, Days ± 1, Price ± 0.010, Count ± 1, Bulb, Laptop, Air conditioner, or Kettle. The large cost changes at once.

The sample is 100 W, 5 hours, 30 days, 0.150, one unit. Time ＋ 30 min is 2.475. Air conditioner is 18.000. Kettle is 1.350. Copy takes that table.

02What you get

The large text is 2.250. Beside it are 15.000 kWh, a daily run of 05:00:00, and a daily cost of 0.075.

Twelve stretches cost 27.000. Recent results stay in this browser.

Entered100 W

Time ＋ 30 min	2.475
Air conditioner 1000 W · 4 hours	18.000
Kettle 1500 W · 12 min	1.350
Count ＋ 1	4.500

03Worth knowing

Kilowatt-hours are watts × hours ÷ 1000. Cost is that energy times the price per kWh. The price uses whatever currency is printed on the bill.

Nameplate watts are a maximum. A thermostat cycles under that. A standing charge is due even if the appliance stays off. Nothing is sent to a server.

Questions

QWhat is 2.250?: AThe stretch cost of 100 W for 05:00:00, 30 days, at 0.150.
QWhat is 15.000?: AThe stretch energy for the same inputs.
QWhat is 05:30:00?: AThe daily run after adding 30 minutes. The cost becomes 2.475.
QWhat is 18.000?: AThe stretch cost of a 1000 W air conditioner for 04:00:00.

# electricity cost
# kWh
# 2.250
# watts

Why this exists

01How to use it

02What you get

03Worth knowing

Questions

Saved