| Formula | Calculator | Reverse units |
|---|---|---|
| 1 wattsecond = 685 candela second steradian | Show conversions from candela second steradian | |
| 1 wattsecond = 1.002928 joule | Show conversions from joule | |
| 1 wattsecond = 0.1902778 lumen hour | Show conversions from lumen hour | |
| 1 wattsecond = 685 lumen second | Show conversions from lumen second | |
| 1 wattsecond = 685 lux second square meter | Show conversions from lux second square meter | |
| 1 wattsecond = 685 talbot | Show conversions from talbot |