How long does it take for 1 gallon of water to evaporate at 70 degrees?

The time it takes for 1 gallon of water to evaporate at 70 degrees Fahrenheit can vary based on factors such as humidity, air circulation, and surface area. Under typical conditions, it could take anywhere from several hours to a few days for a gallon of water to fully evaporate. Higher temperatures, lower humidity, and increased airflow would speed up the process, while cooler or more humid conditions would slow it down.