Work out cell size estimation instantly with clear inputs, formula shown and shareable results.
Multiplies the graticule divisions spanned by the calibration value for the objective in use to give the specimen size in microns.
Graticule measurement
Size (microns) = divisions spanned x calibrated microns per division for that objective
Against a stage micrometer, separately for each objective, because the calibration changes with magnification.
Bacteria are 1 to 5 microns, animal cells 10 to 30 microns and plant cells often 50 to 100 microns.