How many drops would be equal to 1/2 of a tablet?

Kan Herb Company recommended dosages lists 10-20 drops as equal to 1/2 of a 500mg tablet or 10-20 drops as equal to 1 250mg tablet.

General Animal Dosage Guidelines
The following dosage recommendations are based upon dosages for humans, and from
feedback from practicing veterinarians. These suggestions are offered only as a guideline.
Final determination of dosage should be made after professional assessment of each animal.

WEIGHT 250 MG. TABLETS 500 MG. TABLETS EXTRACTS
1-10 lbs. 1/ 2 tab 1/ 4 tab 5-10 drops
11-20 lbs. 1 tab 1/ 2 tab 10-20 drops
21- 5 lbs. 2 tabs 1 tab 1/ 2 -1 dropperful
36-75 lbs. 4 tabs 2 tabs 1-1 1/ 2 droppersful
76-100 lbs. 6 tabs 3 tabs 1 1/ 2 -2 droppersful
Administer to dogs up to three times daily with meals.
1 dropperful = 30-35 drops
WEIGHT 250 MG. TABLETS 500 MG. TABLETS EXTRACTS
1-10 lbs. 1/ 2 tab 1/4 tab 5-10 drops
11-20 lbs. 1 tab 1/ 2 tab 10-20 drops
21-35 lbs. 2 tabs 1 tab 1/ 2 -1 dropperful
Administer to cats up to three times daily with meals.
1 dropperful = 30-35 drops
WEIGHT 500 MG. TABLETS EXTRACTS
330-650 lbs. 9-18 tabs 6-9 droppersful/5-6 cc
650-1000 lbs. 18-25 tabs 9-12 droppersful/6-10 cc
1000-1300 lbs. 25-32 tabs 12-15 droppersful/10-13 cc
Administer to horses and ponies up to two times daily with meals.
1 dropperful = 30-35 dr