Pixel Scale Calculator
Calculate image scale in arcseconds per pixel. Determine if your setup is properly sampled for your seeing conditions.
Typical seeing: 1.5-2" (excellent), 2-3" (good), 3-4" (average), 4+" (poor)
Pixel Scale
1.55
arcsec/pixel
Pixels per Arcmin
38.7
Resolution
93 px/°
Well Sampled
Your pixel scale is well matched to the seeing conditions. This is the sweet spot for resolution and signal.
Sampling Guide
Your Seeing:2.5" FWHM
Optimal Range:1.25" - 2.50"
Your Scale:1.55"
Formula Reference
Pixel Scale = 206.265 × (pixelSize / focalLength)
Where 206.265 converts radians to arcseconds, pixel size is in µm, and focal length is in mm.