Free spin offers look the same on the surface (100 free spins on Book of Dead, etc.) but the real value varies enormously. A 100 free spins offer at 0.10p per spin with 0x wagering is worth £10 in cash. The same offer at the same spin value with 50x wagering is worth about £2 in expected withdrawable cash. This calculator does the comparison in seconds.

Enter the number of free spins, value per spin, the slot's RTP, the wagering requirement on winnings, and the win cap (if any). The calculator returns: expected winnings from the spins, expected loss during wagering, expected withdrawable cash, and the percentage of "headline value" that converts to real money. Most UK casino free spin offers convert at 20–50% of headline value — meaning a "100 free spins" offer is realistically worth £2–£5 in your pocket.

Pair with our bonus terms decoder to understand any win cap restrictions and game weighting. The combination of a high win cap (e.g. £5 max win) plus 30x wagering can make even a generous-looking free spin offer effectively worthless. We rank the best free spin offers at /free-spins.