This is from the site:
Research shows that most adults can consume up to 400 mg of caffeine per day, without negatively affecting their health in terms of toxicity (poisoning), cardiovascular health, bone and calcium status, behaviour, cancer, or male fertility.
then this was for me:
Your total caffeine intake was 572 mg.
Your caffeine intake [i]is within the levels recommended [/i]by NSW Health for safe caffeine consumption.
I think caffeine tolerance is an individual thing, I can usually tell when I am having too much coffee. Other than not being able to sleep!! :D