How do you calculate aggregate yield?

Divide the tons of on-spec product by the total tons of feed processed in the same period and multiply by 100. With 850 tons of product from 1,000 tons of feed, aggregate yield is 85%.

What is a good aggregate yield percentage?

It depends on deposit quality and product mix, but well-run hard-rock plants often run 85-95% saleable yield. The example's 85% sits at the lower end and leaves a 10-point gap to a 95% target worth chasing.

What is the gap to target telling me?

It is your target minus your actual yield. At 85% actual against a 95% target the gap is 10 points, meaning 100 extra tons of saleable product per 1,000 tons of feed are currently being lost.

Why is aggregate yield lower than expected?

Common causes are over-crushing that creates excess fines, contamination or clay in the feed, poor screening efficiency sending good material to waste, and out-of-spec gradation. Each shows up as product mass that never reaches the saleable pile.

Is aggregate yield the same as screening efficiency?

No. Screening efficiency is how well one deck separates a single cut; aggregate yield is the whole-plant ratio of saleable product to total feed across all crushing and screening stages combined.

How much revenue is one yield point worth?

On a 1,000-ton feed, one point of yield is 10 tons of product. Closing the example's 10-point gap recovers 100 tons of saleable aggregate per 1,000 tons fed, which is substantial across an annual tonnage.

Bulk Solids, Mining, Aggregates & Material Processing calculator

Aggregate Yield Calculator

Aggregate yield is the percentage of your total feed that ends up as saleable, on-spec product after crushing, screening and washing. Quarry and pit managers, process engineers and plant accountants track it because every percentage point of yield is direct revenue lost to fines, rejects, contamination or over-crushing. It is the single cleanest measure of how much of the rock you blast and haul actually becomes a product you can sell. This calculator reports the yield percentage and, just as usefully, the gap between where you are and the target you set, so the conversation moves straight to recovery.

What this calculator does

Estimate aggregate yield for aggregate yield for bulk solids, mining, aggregates, and material processing using plant-floor material, production, quality, capacity, or cost inputs.
a plant team is reviewing aggregate yield for bulk solids, mining, aggregates, and material processing and needs a clear aggregate yield for production, quality, capacity, maintenance, purchasing, or costing decisions
It divides on-spec recovered product by total feed processed in the same period and multiplies by 100, then subtracts the result from your target to show the shortfall in points.

Formula used

Aggregate Yield = aggregate yield accepted or affected material ÷ total ore, aggregate, powder, sand, gravel, fines, or bulk solid in same period × 100
Gap to target = target - aggregate yield

Inputs explained

On-spec product recovered:
Total feed processed in the same period:
Target aggregate yield:

How to use the result

Use it at shift, day or campaign close to see how much of your processed feed converted to saleable product and whether you are meeting the recovery target.
It is a mass-balance ratio, not a value-weighted one: a high-yield run that produces the wrong size mix or low-value fines can still miss revenue targets the percentage looks fine.

Common questions

How do you calculate aggregate yield? Divide the tons of on-spec product by the total tons of feed processed in the same period and multiply by 100. With 850 tons of product from 1,000 tons of feed, aggregate yield is 85%.
What is a good aggregate yield percentage? It depends on deposit quality and product mix, but well-run hard-rock plants often run 85-95% saleable yield. The example's 85% sits at the lower end and leaves a 10-point gap to a 95% target worth chasing.
What is the gap to target telling me? It is your target minus your actual yield. At 85% actual against a 95% target the gap is 10 points, meaning 100 extra tons of saleable product per 1,000 tons of feed are currently being lost.
Why is aggregate yield lower than expected? Common causes are over-crushing that creates excess fines, contamination or clay in the feed, poor screening efficiency sending good material to waste, and out-of-spec gradation. Each shows up as product mass that never reaches the saleable pile.
Is aggregate yield the same as screening efficiency? No. Screening efficiency is how well one deck separates a single cut; aggregate yield is the whole-plant ratio of saleable product to total feed across all crushing and screening stages combined.

Last reviewed 2026-05-12.