Hi Zoltán! 
On average, 16 puffs is one cigarette, 1ml of liquid can be roughly 30-35 puffs, naturally when vaping MTL, however, it matters what kind of coil, what kind of cotton, or if it’s an atomizer. If we only rely on the numbers, then 1ml of liquid is roughly 2 cigarettes, meaning 50ml of liquid is 100 cigarettes. If I