Tools · Calculator

Roulette Payout Calculator

A roulette payout calculator: return, net profit and expected loss for a stake on any bet.

Bet

Stake

stake

£10

if it wins

+£350 · £360 back

if it loses

−£10

probability of winning

2.70%

expected value / spin

−£0.27

expected loss / 100 spins

−£27.03

Reading the result

Staking £10 on a straight up returns £360 when it hits (£350 profit plus the stake) and loses £10 otherwise. Averaged over many spins that is a loss of £0.27 per spin, which is 2.70% of the stake.

Method and assumptions

Payout = stake × (36/n − 1). Expected value = p·W − (1−p)·stake = −stake/37. No la partage.