Use the converter below to change any weeks value into seconds instantly — with formula, conversion table, and real-world examples.
Example: 10 wk × 604,800 = 6,048,000 s.
The week equals 7 days — an invention of the ancient Babylonians linked to the 7 classical planetary bodies visible to the naked eye. The 7-day week is nearly universal today, used by all major calendar systems.
The second is the SI base unit of time. It is defined by the caesium-133 atomic transition: 9,192,631,770 cycles of this oscillation equal one second. Modern atomic clocks maintain the second to about 10⁻¹⁶ accuracy — you would lose one second in 100 million years.
Common weeks to seconds values for quick reference.