Online Calculators > Time Calculators > How Many Seconds in a Billion YearsHow Many Seconds in a Billion Years?
How Many Seconds in a Billion Years?  There are 31,536,000,000,000,000 seconds in a billion years.
Years 

Day 

Second 

Nanosecond 

Microsecond 

Millisecond 

Minute 

Hour 

Week 

Month 

