No weighbridge? Two measurements with an ordinary tape give a good estimate of your horse's weight, close enough to track changes, dose wormers and plan feed. Enter the heart girth and body length in centimetres or inches and the calculator gives the weight in kilograms and pounds.
It was developed for adult riding horses and is less accurate for foals, heavy draught types, heavily pregnant mares and very fit or very fat horses.
Measure the heart girth and the body length with a soft tape. Weight in kg is girth (cm) squared times length (cm) divided by 11,880; in pounds it is girth (in) squared times length (in) divided by 330.
Tape estimates are usually within about 10% for an adult riding horse. They are best used to spot changes over time, measured the same way each time.
Related: hay & forage calculator · rider weight calculator · worming planner.
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