Calculators and tools
Eight calculators, each answering one question. All of them run in your browser — nothing is sent anywhere, nothing is stored. For the amount you actually owe, always use your official duplicate bill.
Electricity bill calculator
“I know my units — what will the bill be?”
Runs a monthly unit total through progressive domestic slabs with illustrative surcharges and tax.
Monthly usage estimator
“Where is this cycle heading, and can I still change it?”
Projects the cycle from two meter readings, and warns which slab boundary you are about to cross.
Appliance consumption calculator
“Which appliance is eating my bill?”
Builds a household total appliance by appliance and names the single largest contributor.
Unit converter
“How do watts, tons and horsepower turn into units?”
Watts to units, AC tons to electrical input, and motor horsepower to watts — with honest ranges.
Load calculator
“What load should I sanction, and do I need three phases?”
Connected load, realistic peak, kVA, current per phase and a defensible sanctioned-load figure.
Solar savings calculator
“Would rooftop solar pay, and how fast?”
Generation by region, self-consumption versus export, net-metering credit and simple payback.
Energy efficiency audit
“What should I change first?”
Twelve questions returning a priority list ordered by units saved, not by how easy it sounds.
Gas bill calculator
“What will my SNGPL gas bill be?”
Estimates a gas bill from cubic metres or MMBTU using slab-style domestic gas rates.
About these tools
Are these calculators accurate enough to dispute a bill with?
No, and they are not meant to be. NEPRA revises tariffs, fuel adjustments and surcharges regularly, so every rupee figure here is illustrative. Use them to understand where your units go and to sanity-check a bill, then use the official duplicate for anything you intend to pay or contest.
Which calculator should I start with?
If a bill has already arrived and looks wrong, start with the bill calculator to check the arithmetic. If you want to prevent the next one being high, start with the monthly usage estimator — it is the only tool here that acts before the cycle closes.
Do these tools store or send my data?
No. Every calculator runs entirely in your browser. Nothing is transmitted to a server, nothing is stored, and closing the page discards the inputs.
Can I use these for a shop or a factory?
The unit and load arithmetic applies to any connection. The rupee estimates do not, because commercial and industrial tariffs carry fixed charges, demand charges and a different rate structure than the domestic slabs modelled here.
The data behind them
- Appliance consumption data — the wattages and duty cycles the calculators are built from.
- Tariff and bill components — what each line on a bill is and how it is set.
- Bill glossary — every term the tools use, defined.
- Reducing your bill — what to do with what the tools tell you.
Check any Pakistan DISCO electricity bill
Use your 14-digit reference number on the home checker, or jump straight to the DISCO that bills your address.