Generator Fuel Cost Calculator
Estimate the fuel cost of running a generator in Pakistan — a common load-shedding expense.
About the Generator Fuel Cost Calculator
The Generator Fuel Cost Calculator gives you a clear, instant answer to a question that usually means digging through tables or guessing — enter your numbers and read the result straight away.
A generator is the standby power solution for homes and businesses across Pakistan, and sizing it correctly avoids two expensive mistakes: buying one too small that overloads, or too large that wastes fuel. This Generator Fuel Cost Calculator sizes your generator from your load requirements.
The calculation adds your running load and applies the standard safety margin — generators should run at 70–80% of capacity, never flat out — to arrive at the right kVA or kW rating.
Fuel consumption follows the load: a generator under light load burns less per hour but costs more per unit of useful power. Sizing it to your typical load, not your peak, balances cost and reliability.
Match the result to the generator's rated output (kVA) — convert kW to kVA by dividing by the power factor, typically 0.8 for single-phase generators used in Pakistani homes.
Bookmark the Generator Fuel Cost Calculator for the next time you need it, and explore the rest of GuruAlpha's 1,200+ calculators for related everyday maths.
How to size a generator
- 1
Enter the total load of the appliances you must run during outages.
- 2
Read the recommended generator size in kW and kVA, updated live.
- 3
Choose a generator rated at or above the kVA figure.
Frequently Asked Questions
How much fuel does a generator use?
A small 2 kVA petrol generator burns ~0.8–1.2 L/hour; a 5 kVA diesel unit ~1.5–2.5 L/hour under load. Multiply by your daily load-shedding hours and fuel price.
How do I convert kW to kVA for a generator?
Divide kW by the power factor — usually 0.8 for single-phase generators. So a 5 kW load needs a generator rated at about 6.25 kVA.
Should I size a generator for peak or typical load?
Size for the appliances you genuinely need during an outage, plus a 20–30% margin. Sizing for every appliance in the house makes the generator expensive to buy and wasteful on fuel.