So been on this thing for maybe a few months now and it's basically bookmarked at this point, reckon I'd write something up since a mate asked me last week. I'm in the UK, mainly stick to footie and the horses, a fiver here and there, for context. The reason I started using it was genuinely a bit daft I could never figure out what an e/w payout actually came to with 1/5 odds a place. I'd just eyeball it and moan when the payout landed. Now I type the odds in first, every time, even a simple single bet. Their single bet calculator tool is the bit I open most you drop in the price and your stake and it shows profit and total return instantly, either odds format. It also handles the fiddly ones trebles maths, lucky 15s, patents and yankees, and that's where I always mess it up. Have a go yourself, it's here <a href=https://free-bet-calc.uk/bet-calculator/implied-probability>how to calculate implied probability with decimal odds</a> free, no signup. What really made a difference were the nerdier tools. The odds-to-probability thing and it makes obvious how much the bookie's taking, and there's the kelly criterion tool I run quarter kelly since full stakes are a quick route to a dead bankroll. Dutching calculator gets used a fair bit for when I'm spreading across selections. It's not perfect mind. Its interface looks a bit basic zero flash, which honestly I don't mind but some will. On mobile it works although the acca grid need a bit of scrolling. Also there's no proper app, it's browser only doesn't bother me but worth saying. Right, that's me. Free, not plastered in adverts, works. If anyone still adds it up in their head, give it a go saves me a fair few arguments with the bookie.