It’s often difficult to understand how large an area is without measuring. One 5 litre bottle of Monty Cleaner will cover 25 square metres.  You can pace out the length and width of your area and multiply them to get an approximate idea. An average stride is 1 metre, so if your driveway is 4 strides by 6 then this would be 24 square metres and one bottle of Monty Cleaner would be all you will need, for example.

5 Litre BottlesArea Covered (SQM)Notes
125Approx 2.5 VW Golf cars.
375Approx 8.5 VW Golf cars.