OK — been on this thing for maybe five months now and I keep coming back, so thought I'd write something up since someone asked me last week. Am in the UK, mostly stick to footie and the horses, nothing mad, for context.
How I found it was actually embarrassing — I never could get my head round what an e/w payout actually came to when the place terms changed. Basically I'd eyeball it and get a shock. Now I stick my stake in before I place anything, even a straight one-selection punt.
The single bet calculator is the part I open most — you put in the price and your stake and it spits out the return straight away, fractions or decimals. There's also the multiples — trebles returns, lucky 15s, a yankee, honestly that's where I'd always got it wrong. If you fancy a poke about, it lives at matched bet calculator — free, no signup.
One thing that really changed how I bet is the nerdier tools. There's an implied probability converter and it makes obvious how much the bookie's taking, and a kelly calculator — I use half kelly since full stakes are a quick route to a dead bankroll. The dutching one gets used a fair bit when I'm covering two or three runners.
Couple of gripes. The layout is a bit basic — zero flash, looks like it was built by someone who cares more about maths than colours. Phone-wise it works though the bigger tables make you pinch and zoom. And no app, it's browser only — fine by me just flagging it.
So yeah. Costs nowt, not plastered in adverts, does the job. If anyone honestly does the maths on paper, have a look — saved me a fair few dumb bets I'd have regretted.