Extra cost of heating, cooling, and standby

The calculator uses the numbers you enter: heating or air-conditioning hours off the usual setting, the cost of one such hour, and devices in standby. 3 hours at 0.4 and 8 devices at 2 is 624 this year. The electricity bill sits in the grid and is not in the extra.

The calculator does not read the meter. The electricity bill sits in the grid and is not in the extra. Work-from-home days are optional. Home versus office: remote-work cost balance.

Input data

Enter heating or air-conditioning hours off the usual setting, the cost of one such hour, and devices in standby. You can leave the electricity bill as context.

Optional context

This field is optional. Work-from-home days appear in the grid beside the habit extra. A blank field skips that context and does not change the main result.

Results

Enter data and click Calculate.

How it works

The calculator multiplies heating or air-conditioning hours off the usual setting by 30 days and by the cost of one hour. It adds devices in standby multiplied by the monthly cost of one device. 3 hours at 0.4 is 36 a month. 8 devices at 2 is 16. 52 times 12 is 624 this year.

The main result comes from the hours, the hour cost, the device count, and the standby cost. The electricity bill sits in the grid and is not in the extra. Work-from-home days are optional and do not change the main result.

Second example: 1 hour at 0.3 and 4 devices at 1 is 156. Third: 6 hours at 0.5 and 14 devices at 2.5 is 1500.

The calculator does not read the meter and does not turn a saving into kilowatt-hours. A comma in 12.5 is read the same way as a period.

Formula

Result = (hours × 30 × hour cost + devices × standby cost) × 12. At 3, 0.4, 8 and 2: (36 + 16) × 12 = 624. The electricity bill sits in the grid.

What these numbers mean

3 hours at 0.4 and 8 devices at 2 is 624 this year.

habit extra
Heating or air-conditioning hours times 30 and times the hour cost, plus standby devices times the cost of one. At 3, 0.4, 8 and 2 that is 624 this year.
heating or air conditioning
Hours off the usual setting. They enter the extra only with the hour cost you enter. They are not a meter reading.
electricity bill
The monthly amount, then multiplied by 12. It appears in the grid and is not in the extra.

How to use

  1. Enter 3 hours and an hour cost of 0.4.
  2. Add 8 devices at 2. You can leave the electricity bill as context.
  3. Click Calculate. The result is 624 this year.
  4. Second example: 120, 1, 0.3, 4 and 1 is 156. Third: 280, 6, 0.5, 14 and 2.5 is 1500.
  5. You can skip work-from-home days. When you fill them, they appear in the grid and do not change the main result.

Examples

Example 1

  • bill 165
  • heating 3 h
  • hour 0.4
  • standby 8
  • device 2

624 this year

3 hours at 0.4 across 30 days is 36 a month. 8 devices at 2 is 16. (36 + 16) × 12 = 624.

Example 2

  • bill 120
  • heating 1 h
  • hour 0.3
  • standby 4
  • device 1

156 this year

1 hour at 0.3 across 30 days is 9 a month. 4 devices at 1 is 4. (9 + 4) × 12 = 156.

Example 3

  • bill 280
  • heating 6 h
  • hour 0.5
  • standby 14
  • device 2.5

1500 this year

6 hours at 0.5 across 30 days is 90 a month. 14 devices at 2.5 is 35. (90 + 35) × 12 = 1500.

Related calculators

Household admin hours

Household admin hours: 8 times 30 over 60 plus 2 times 45 over 60 minus 6 is 0.5 hours below. People sit in the grid.

Use calculator →

Office days cost

Office days cost calculator: required days a week, one-way commute minutes, and the lunch gap.

Use calculator →

All lifestyle calculators

Common questions

What does 624 this year mean?

3 hours at 0.4 across 30 days is 36 a month. 8 devices at 2 is 16. (36 + 16) × 12 = 624.

How is the result calculated?

Result = (hours × 30 × hour cost + devices × standby cost) × 12. At 3, 0.4, 8 and 2: (36 + 16) × 12 = 624.

What is the second example?

1 hour at 0.3 and 4 devices at 1 is 156.

What is the third example?

6 hours at 0.5 and 14 devices at 2.5 is 1500.

What does the calculator not do?

The calculator does not read the meter and does not turn a saving into kilowatt-hours. Work-from-home days are optional.

Do all fields enter the main result?

No. The main result comes from the hours, the hour cost, the device count, and the standby cost. The electricity bill sits in the grid. Work-from-home days are optional.

What do habit extra, heating or air conditioning, and electricity bill mean?

The extra is hours times 30 times the hour cost plus devices times standby cost, then times 12. Heating or air conditioning is hours off the usual setting. The electricity bill sits in the grid.

Does a comma in 12.5 work?

Yes. 12.5 and 12,5 are read the same way.

Sources

The result comes from the numbers you enter. This is the extra from hours and standby, not a meter readout.

Page updated in 2026.