@mcardle_bob @Knightcider @IanDunt That's how percentages work, but not how vape juice works - you tend to do the conversion on a per mL basis. To convert from mg/mL to %age you multiply mg by 10: 5% x 10 50mg/mL. I just remember that 2.5%NBV is 25mg/mL and work from that though tbh