Free spins value calculator. Let’s take a typical offer: 50 spins at £0.20 on a 96% slot, winnings come with 35× wagering.
The spins have a face value of £10. On average they pay back 96% of that, so £9.60. But that £9.60 is bonus money, and you have to bet it 35 times: £336 of spins. At a 4% house edge that costs about £13.44. More than you won. The realistic value of the offer is pretty much zero.
The same 50 spins with no wagering? £9.60, straight into your balance.
How the free spins value calculator works it out
Expected winnings = spins × spin value × RTP Cost of wagering = winnings × wagering × (1 − RTP) Value = winnings − cost (never below £0)
The quick rule for a 96% slot: at 25× wagering on winnings, the cost eats everything. Below that you keep something. At 10× those same spins are worth about £5.76. Above 25×, think of the spins as entertainment, not value.
Things that change the picture
Spin value is the big one. “100 free spins” at £0.10 is the same £10 as 50 at £0.20. Casinos know that a bigger number looks better on a banner.
Max cashout caps cut off the big wins, which is where a lot of the average comes from. If your spins are capped at £50, the real value is lower than what you see here. We don’t model caps, so treat the result as the best case.
And check which game the spins are on. A lower-RTP version of the slot changes both the winnings and the wagering cost.
Comparing two offers
Offer A: 100 spins at £0.10, winnings at 40× wagering. Offer B: 20 spins at £0.50, no wagering. Both are £10 of spins, so both expect about £9.60 in winnings on a 96% slot.
Offer A then asks you to bet that £9.60 forty times, £384 in all, which costs about £15.36 on average. The value comes out at nothing. Offer B pays you the £9.60 as cash. Same face value, and one of them is worth almost ten pounds while the other is worth nothing. A hundred spins sounds better on the banner. Twenty is the better offer.
Drop Offer A’s wagering to 10× and those same spins are worth about £5.76. The multiplier on the winnings matters more than the number of spins on the banner.