Knowing your horses weight is essential to a good worming programme there is a lot of variation in horse wormers delivery: 

Underdosing can promote resistance and it is never a good idea to overdose a horse wormer.

  • The most accurate but not neccessarily the most practical way of weighing a horse is to put them on a weigh bridge
  • Equine Weight tapes can be used to estimate the weight of a horse
  • If you do not have access to either a weigh bridge or a weigh tape it is possible to estimate a horses weight by measuring from the horses withers round the belt and back round to the withers and using the girth measurement on the table below to estimate the horses weight.
 Girth  Length
 Weight
(inches)(cm)(lbs)(kg)

30.0

76

100

45.5

40.0

102

200

91.0

45.5

116

300

136.5

50.5

128

400

182.0

55.0

140

500

227.0

58.5

148

600

273.0

61.5

156

700

318.0

64.5

164

800

364.0

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