How to convert 2500litres to meter cubed?

One litre is equivalent to 0.001 cubic meters.

$$1 \text{ L} = 0.001 \text{ m}^3$$

$$2500 \text{ L} \times \frac{0.001 \text{ m}^3}{1 \text{ L}}$$ $$2500 \times 0.001 \text{ m}^3$$ $$2.5 \text{ m}^3$$

Therefore, 2500 litres is equal to $\boxed{\text{2.5 m}^3}$.