In Richard Dawkins Book “The God Delusion” , the author shows a scale from 1 to 7 on which we can rank our certainty [or lack there-of] of god’s existence.

1. Strong Theist. 100% probability of God. In the words of C. G. Jung, – ‘I do not believe, I know.’
2. Very High probability but short of 100%. De facto theist. – ‘I cannot know for certain, but I strongly believe in God and live my life on the assumption that he is there.’
3. Higher than 50% but not very high. Technically agnostic but leaning toward theism. ‘I am very uncertain, but I am inclined to believe in God.’
4. Exactly 50% but not very high. Completely impartial agnostic. ‘God’s existence and non-existence are exactly equiprobable.’
5. Lower than 50% but not very low. Technically agnostic but leaning toward atheism. ‘I don’t know whether God exists but I’m inclined to be sceptical.’
6. Very low probability, but short of zero. De facto atheist. ‘I cannot know for certain but I think God is very improbable, and I live my life on the assumption that he is not there.’
7. Strong atheist. ‘I know there is no God with the same conviction as Jung ‘knows’ there is one.’