1. How to calculate electricity units

Electricity companies measure energy in units.

1 electricity unit = 1 kWh (kilowatt-hour).

Formula:

$$\text{Units}=\frac{\text{Wattage}\times \text{Hours used}}{1000}$$Units=1000Wattage×Hours used​

Example: A 1000-watt heater runs for 2 hours.

$$\frac{1000\times 2}{1000}=2\text{ units}$$10001000×2​=2 units

Here are some common examples:

Appliance	Power	Usage	Units
LED bulb	10 W	10 hours	0.1
Fan	70 W	10 hours	0.7
TV	100 W	5 hours	0.5
Iron	1000 W	1 hour	1
Heater	2000 W	2 hours	4

2. How to calculate units from an electricity meter

For a digital electricity meter, look for the reading marked kWh.

Formula:

$$\text{Units consumed}=\text{Current reading}-\text{Previous reading}$$Units consumed=Current reading−Previous reading

Example:

• Previous reading: 12,450 units
• Current reading: 12,720 units

$$12720-12450=\boxed{{\displaystyle 270\text{ units}}}$$12720−12450=270 units​

So, you consumed 270 units during that billing period.

If you mean a micrometer or a special type of electricity meter, tell me which meter you are studying so I can explain how to read it.

3. MahaVitaran electricity bill calculation

MahaVitaran, also known as MSEDCL, supplies electricity across much of Maharashtra.

Your bill can include several components:

• Energy charges — based on units consumed and the applicable tariff slabs.
• Fixed charges — depending on your connection and tariff.
• Wheeling charges and other applicable charges.
• Electricity duty and other applicable taxes or adjustments.

Important: The amount per unit is not necessarily the same for every unit. It depends on your consumer category, consumption slabs and the tariff in force. For official rates and rules, see the MSEDCL website .

4. Let’s practise together

Electricity unit calculator

Enter the appliance power and daily usage to calculate monthly units.Appliance power (watts)Hours used per dayDays used

Calculated energy consumption

30 units

This calculates energy consumption, not the final bill amount.

Electricity meter reading practice

Previous meter readingCurrent meter reading

Units consumed: 180 units