Scales: 1:10,000 x 500m 1:24,000 x 1km 1:25,000 x 1km 1:50,000 x 2km 1:100,000 x 5km 1:250,000 x 10km 1:500,000 x 20km This scale can be used by multiplying or dividing one of the scales printed on the tool by 10. For example, a 1:100,000 x 10km tool can be used as a 1:10,000 x 1km tool by dividing the scale and grid distance by 10, and as a 1:1,000,000 x 100km tool by multiplying the scale and grid distance by 10.