How Long Does a Horse Salt Block Last?

By Horse Salt Supply editorial team · Updated 25 October 2026

There is no fixed number of weeks that a salt block lasts for every horse. Estimate replacement timing from measured weight loss in your own setup. Intake, rainfall, breakage and the number of animals with access can all change the observed rate.

How do I record actual block use?

Record the block’s starting net weight and the date.
Reweigh after a measured interval using the same method.
Note rain exposure, broken pieces and shared access.
Subtract the new weight from the starting weight.
Divide the loss by elapsed days.

This gives an observed disappearance rate. It should be recorded as disappearance rather than assumed individual consumption whenever water loss or shared access is possible.

Can you show a worked example?

Suppose a block begins at 3,500 g and weighs 3,150 g seven days later. The difference is 350 g. Dividing 350 by seven gives 50 g per day of observed loss. At that same rate, 3,150 g remaining divided by 50 gives about 63 more days.

This is an arithmetic example for purchasing and replacement planning. It is not a feeding recommendation, a product-performance test or a promise that a 7.7 lb block lasts 70 days. A different animal or mounting location may produce a very different result.

What can make the estimate unreliable?

Rain and standing water can dissolve salt. A piece may break away. Several animals may use the same lick. A change in access or weather can make last week’s rate a poor predictor of next week’s rate.

Repeat the observations after a change in setup. If the block is shared, do not divide group loss by animal count and treat the result as each animal’s actual intake. Keep feeding questions separate from the simple stock-planning calculation.

When should I order a replacement?

Plan for a replacement before the remaining block becomes unsuitable for its mounting arrangement. Inspect the holder or rope during routine checks; calendar age alone cannot establish whether the remaining piece is secure. Keep a spare if a delivery delay would leave the stable without the chosen product.

Choose the replacement by its labelled weight and format. Compare the 6.6 lb rope lick and 7.7 lb solid block in our buying guide. Ask a veterinarian or nutritionist about the appropriate feeding plan for the horse.