How much is 4d in today's money?

To determine how much 4d (four pence) is in today's money, we can convert it to modern currency. In the UK, 4d is equivalent to 1/5 of a shilling, or 1/60 of a pound. Today, this would be roughly equivalent to 1.67 pence, considering inflation and changes in currency value over time. However, the exact value can vary based on historical context and specific inflation calculations.