Enter the resolution and PPI into the calculator to convert between resolution and scale.

## Scale Resolution Formula

The following formula is used to convert a resolution to a scale.

Scale = 1: (R * PPI)

- Where R is the resolution (inches)
- PPI is the pixels per inch
- The scale is the ratio 1: X

## Scale Definition

**Scale vs resolution? **A resolution is a measure of the total size that one pixel represents. For example, in a satellite image in a resolution could be 1,000 inches per pixel.

## Example Problem

How to convert resolution to scale?

**First, determine the resolution.**For this example, the resolution is 2 inch.

**Next, determine the PPI.**The PPI in this problem is 20 pixels per inch.

**Finally, calculate the scale.**The scale is then found to be 1:40.