Home calculation glossary
Simple definitions for electricity, battery, construction and land-measurement terms used in GharGanit calculators.
Watt, kW and kWh
A watt is the rate at which an appliance uses power. A kilowatt is 1,000 watts. A kilowatt-hour, kWh, is energy used over time and is commonly called one electricity unit.
VA, Ah and efficiency
VA is an apparent-power rating often used for inverters. Ah is battery charge capacity at a stated voltage. Efficiency is the share delivered after losses, not a guarantee of runtime.
Area, volume and wastage
Area measures a flat surface. Volume includes thickness. Wastage is an editable allowance for cuts, breakage and handling, not a fixed rule.
Standard and regional land units
Square feet, square metres and acres have fixed relationships. Bigha and Katha are regional names that can need a verified location-specific factor.