Monthly usage estimator
Everything else on this site explains a bill after it has arrived. This one tells you what it is going to say while there is still time to change it. Two meter readings taken days apart are enough to project where the cycle finishes, which slab that lands in, and how much you would have to cut to stay under the boundary you are heading for.
Two readings, days apart
Use the present reading from your last bill as the starting figure, and today’s meter reading as the second. Days elapsed is the number of days between the bill’s reading date and today.
Where this cycle is heading
450 units projected
- Used so far210 units
- Daily average15 units / day
- Days left in the cycle16
- Estimated bill at this rateRs 16,453
- Next slab boundary at 500 units50 units of headroom
- Protected status (200-unit test)This cycle would break it
You have already passed the 400-unit boundary in projection. To finish the cycle under it, your remaining 16 days would have to average 11.88 units a day against your current 15. Whether that is realistic tells you whether to act or to accept the higher slab.
The two readings you need
The first is the present reading printed on your last bill — that is the figure the current cycle started from. The second is what your meter shows today.
Days elapsed is the gap between the bill's reading date and today, not the day of the month. Reading dates follow the meter reader's route for your feeder and rarely fall on the 1st.
Why the boundary warning is the point
Pakistan's residential ladder is steep, and for unprotected consumers crossing certain boundaries has historically re-priced the whole month rather than only the units above the line. A single extra unit can therefore cost far more than a unit's worth of money.
The protected threshold is harsher still. One month above 200 units moves the account onto the unprotected schedule for the following six cycles, so a hot fortnight in May can raise your bills into November.
Knowing in week three that you are heading past a boundary is what makes it actionable. Knowing in week five, when the bill arrives, is not.
What to actually do with the warning
The tool tells you the daily average you would need to hold for the rest of the cycle. Whether that is realistic is your judgement, but the levers are predictable: the air conditioner thermostat, the geyser switch, and anything with a heating element.
Raising an air conditioner from 22 °C to 26 °C cuts its consumption by roughly a quarter. Switching a geyser from always-on to two heated hours cuts it by three quarters. Between them, those two changes usually cover the gap.
If the gap cannot realistically be closed, the better decision is to accept the higher slab and stop optimising — spreading discomfort across a fortnight for a boundary you will cross anyway achieves nothing.
Reading the meter without touching anything
On a digital meter, wait for the screen marked kWh or coded 1.8.0 and read left to right, stopping at the decimal. On an old disc meter, ignore the final digit if it sits on a red drum.
Photograph it. A dated photograph on the reading date costs nothing and settles almost every billing dispute that ever arises.
Frequently asked questions
How often should I read my own meter?
Weekly, on the same day. That gives four data points per cycle, which is enough to see a trend rather than a single week's weather, and it is the habit that makes every other saving measure targetable.
My projection is much higher than my last bill. Why?
Usually seasonality — the first hot fortnight in a cycle projects a full month of that consumption. Check the projection again after another week before acting on it, and compare against the same month last year on your bill's twelve-month strip rather than against last month.
Does the day of the month matter for slab purposes?
No. The slab is decided by the total units in the cycle, not by when in the cycle they were used. Shifting consumption within a month changes nothing; reducing the total is the only thing that does.
What if my cycle is longer than 30 days?
Set the cycle length to the actual gap between reading dates. A delayed reading stretching the period to 35 days puts five extra days of consumption into one bill, which is a common and entirely legitimate reason for a bill that looks unexpectedly high.
Related
A projection from your own readings. It assumes the rest of the cycle resembles the days measured, which weather regularly disproves. The rupee estimate uses illustrative slab rates; the tariff table on your official bill is the authority on what you will actually be charged.