Tool

FESCO bill calculator using official NEPRA-notified tariff rates for FY 2025-26. Calculate your energy charges by consumer category.

Battery series vs parallel calculator – find the resulting voltage and capacity when wiring batteries together for UPS or solar.

Ah to Wh converter – instantly convert amp-hours to watt-hours for any battery voltage, with a full comparison table.

Salary tax calculator Pakistan 2025-2026 – calculate your exact income tax using official FBR slabs, plus filer benefits and FAQs.

Battery sizing calculation for UPS – find the exact battery capacity (Ah) you need based on your load and desired backup time.

Battery charge time calculator – find out how long your battery takes to fully charge based on capacity, current charge, and charger amps.

How to calculate battery backup time using a free calculator tool, with the full formula explained field by field.