How much to fill a kitchen sink?

The cost to fill a kitchen sink depends on the sink's size and the local water rates. On average, a standard kitchen sink holds about 15 to 20 gallons of water. If we assume a water rate of $0.01 to $0.03 per gallon, filling a sink could cost between $0.15 and $0.60. However, actual costs may vary based on factors like local utility rates and water usage fees.