There isn't really an equivalent. It's a casual and familiar way of asking for something, used especially when you're aware that the answer may be 'no'. The nearest equivalent is 'Do you think...?', as in 'Do you think I could have a bit more time/ a loan of £10/ a lift to the station?'. We'd often add '...by any chance?' to the end of these requests - to make the point that you know that you're being a bit cheeky by asking.