Sleep Cycle Calculator What time do you want to wake up? 123456789101112123456789101112123456789101112 000102030405060708091011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859000102030405060708091011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859000102030405060708091011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859 AM PM Calculate bedtime If you want to go to bed: 123456789101112123456789101112123456789101112 000102030405060708091011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859000102030405060708091011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859000102030405060708091011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859 AM PM Calculate wake-up time