How many cups in 3.7 litres?

To convert litres to cups, we need to multiply the volume in litres by the conversion factor of 4 cups per litre. So, 3.7 litres is equal to:

$$3.7 \text{ litres} \times \frac{4 \text{ cups}}{1 \text{ litre}} = \boxed{14.8 \text{ cups}}$$