Question

Watt-hours is a measure of energy, just like kilowatt-hours. How can you convert this to Joules?

Answer 1

Work with your units:

1 watt-hour = 1 (joule/second) · (hour) = 1 (joule-hour / second)

(1 joule-hour/sec) · (3600 sec/hour) = 3600 joules

So 1 watt-hour = 3,600 joules