Horse Weight
Estimate a horse's weight from heart girth and body length.
About Horse Weight
The classic tape formula squares the heart girth and multiplies by body length, then divides by 330 for pounds. Feed and drug doses scale with weight, so an estimate without a scale keeps medication and rations in the right range.
Formula
Horse Weight
Weight (lb) = girth^2 x length / 330
- heart girth
- Circumference behind the elbows under the withers
Worked example
With the default values below, Horse Weight returns Weight of 1,108. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Heart girthminimum 30 cm
- 75 cm
- Body length (point of shoulder to point of buttock)minimum 30 cm
- 65 cm
Results
- Weight
- 1,108 lb
- Weight
- 503 kg
- Build
- Typical for a riding horse
Step by step
- 1Values used
- 2Horse Weight
- 3Weight= 1,108 lb
- 4Weight= 503 kg
- 5Build= Typical for a riding horse
Assumptions and limits
- The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to whole numbers, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Horse Weight calculated?
Weight (lb) = girth^2 x length / 330 The classic tape formula squares the heart girth and multiplies by body length, then divides by 330 for pounds.
Why does Horse Weight matter?
Feed and drug doses scale with weight, so an estimate without a scale keeps medication and rations in the right range.
What values do I need to enter?
This calculator takes 2 inputs: Heart girth, Body length (point of shoulder to point of buttock). The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.