Circle of Confusion Calculator
Calculate the circle of confusion (CoC) for your camera sensor. The CoC determines what appears acceptably sharp in your photos.
Sensor & Viewing Parameters
Full frame = 36mm, APS-C = 23.5mm, M43 = 17.3mm
Full frame = 24mm, APS-C = 15.6mm, M43 = 13mm
Typical viewing distance is 25-30cm
Recommended CoC
0.0250 mm
Traditional Formula (d/1730)
ZZeiss CoC
0.0288 mm
RResolution CoC
0.0120 mm
VViewing CoC
0.0342 mm
DSensor Diagonal
43.27 mm
PPixel Pitch
6.00 um
EEnlargement
4.70x
Common CoC Values
Full Frame (35mm)0.029-0.030 mm
APS-C (Canon)0.018-0.019 mm
APS-C (Nikon/Sony)0.019-0.020 mm
Micro Four Thirds0.015 mm
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.