Scrap Value Calculator

Not all scrap is created equal — and yards know it. A load that is 95% clean metal pays very differently from one that is 80% clean, even at the same weight and price. The Scrap Value Calculator above prices that difference. Enter the material, weight, price per pound, and your clean material grade percentage, and it returns the full value, clean weight, grade-adjusted value, loss from contamination, and effective value per pound.

Grade is the yard’s measure of how much of your load is actually the metal you claim. Attachments, dirt, oil, insulation, and mixed-in junk all reduce it. A 1,200-pound load at 95% grade contains 1,140 pounds of payable metal — the other 60 pounds are freeloaders. The calculator makes that invisible loss visible in dollars.

This is the tool for honest self-assessment. Before the yard grades your load, grade it yourself. If the calculator says contamination is costing you $336, spending an hour cleaning starts to look like excellent wages.

What “Clean Material Grade” Means

Clean material grade is the percentage of your load’s weight that is pure, single-grade metal. 100% means every pound is the claimed metal with no attachments or contaminants. 95% means 5% of the weight is something else — steel screws in aluminum, insulation on wire, mud on steel.

Yards determine grade by visual inspection and experience, sometimes with test cuts or magnets. Their grade decides your price tier: clean #1 copper at full price, dirty mixed copper downgraded to #2 or “irony” pricing. Because grading is partly judgment, two yards can grade the same load differently — which is why preparing the load yourself is the surest way to control the outcome.

The math is simple: clean weight = total weight × grade ÷ 100, and adjusted value = clean weight × price per pound. The difference between full value and adjusted value is your contamination loss — money left on the table.

Common Contaminants and What They Cost

Attachments are the biggest grade-killer: steel bolts in aluminum assemblies, plastic housings on motors, rubber seals on parts. Coatings — paint, powder coat, plating — add weight without value and can trigger downgrades. Dirt, mud, and oil from demolition or automotive scrap add literal dead weight. Mixed metals force the whole load toward the cheapest metal’s price.

Each contaminant type has a fix: unbolt attachments, strip coatings where practical, let muddy material dry and brush it off, drain fluids completely, and sort mixed metals with a magnet and a practiced eye. An hour of prep routinely recovers 5 to 15 percentage points of grade.

How to Use the Scrap Value Calculator

Select the material, enter the weight in pounds, and set the price per pound (or leave it blank for the default). Then enter your honest clean material grade as a percentage — 100 if it is pristine, lower if attachments or dirt are present. Click Calculate.

Study the loss from contamination row: that is the dollar value of your prep work undone. If the loss exceeds what an hour or two of cleaning would cost you in time, get the wire brush out.

Worked Example 1: Mostly Clean Aluminum

Chris has 1,200 lbs of aluminum at $0.65/lb, estimated 95% clean — a few steel screws and some dirt.

Step 1: Full value. 1,200 × $0.65 = $780.00 if perfectly clean.

Step 2: Clean weight. 1,200 × 95 ÷ 100 = 1,140 lbs of payable metal.

Step 3: Grade-adjusted value. 1,140 × $0.65 = $741.00.

Step 4: Contamination loss. $780.00 − $741.00 = $39.00.

Step 5: Effective value per lb. $741.00 ÷ 1,200 = $0.62/lb.

A $39 loss is modest — but it took zero effort to lose. Removing those screws beforehand would have recovered most of it.

Worked Example 2: Dirty Copper Load

Dana has 800 lbs of copper at $3.50/lb, but it is demolition pull with insulation remnants and solder — about 88% clean.

Step 1: Full value. 800 × $3.50 = $2,800.00.

Step 2: Clean weight. 800 × 88 ÷ 100 = 704 lbs.

Step 3: Grade-adjusted value. 704 × $3.50 = $2,464.00.

Step 4: Contamination loss. $2,800.00 − $2,464.00 = $336.00.

Step 5: Effective value per lb. $2,464.00 ÷ 800 = $3.08/lb.

Here contamination costs $336 — nearly ten times the aluminum example, because the underlying metal is so valuable. On high-value metals, grade is everything: a single percentage point of grade on this load is worth $28. Cleaning copper is the highest-paid unskilled labor in scrapping.

How Yards Actually Grade Your Load

Expect the grader to look, lift, and test. They scan for attachments and mixed material, heft pieces to feel for hidden steel, and use magnets to find ferrous contamination. For wire, they may cut a sample to check the copper-to-insulation ratio. For large loads, they grade a representative portion.

Grading has a subjective element, and borderline calls usually go the yard’s way — that is their margin of safety. Your counter is preparation: the cleaner and better-sorted the load, the less room there is for pessimistic grading. Photograph unusual loads before delivery in case of disputes.

From Dirty to Clean: A Prep Checklist

Work through the load systematically. Remove all attachments — unbolt, unscrew, pry off anything that is not the target metal. Strip insulation from wire to reach bare bright grade. Separate mixed metals completely; even small amounts of a cheaper metal can drag down the grade. Clean off dirt, oil, and concrete — wire-brush, rinse, and dry. Cut oversized pieces to the yard’s preferred lengths. Finally, keep it dry until delivery day; wet loads weigh more but pay the same.

Track your time. If two hours of prep lifts a $2,464 load toward $2,800, you just earned $168 an hour. Few side hustles beat that.

The Economics of Cleaning: When Prep Pays

Cleaning scrap is manual labor, so treat it like a job: compute your effective hourly wage from the grade improvement. The formula is simple: (value after cleaning − value before) ÷ hours spent. If two hours of stripping and unbolting lifts a load’s value by $336, you earned $168 an hour — tax-free in effort terms, since it is your own material.

Prioritize by dollars per hour, not by tidiness. Stripping copper wire often pays $50–$150 an hour. Unbolting steel attachments from aluminum pays $30–$80 an hour. Wire-brushing mud off structural steel might pay $5 an hour — skip it and haul the steel dirty. Work down the list from highest hourly return until the return drops below what your time is worth elsewhere.

Invest in leverage tools once volume justifies them: a wire stripping machine ($100–$300) pays for itself in a single big job, an angle grinder with cutoff wheels speeds attachment removal enormously, and a dedicated sorting station with labeled bins prevents re-mixing. Professionals think in throughput — the faster each grade-point is earned, the higher the hourly rate.

Common Grading Disputes and How to Win Them

The most frequent dispute is the downgrade at the scale: your #1 copper becomes #2, your clean aluminum becomes irony. Stay calm and ask the grader to show you specifically what triggered the downgrade. Sometimes they are right — a single steel insert you missed justifies it. Sometimes pointing at the actual clean material gets the grade restored, because graders make fast judgment calls and will correct genuine mistakes.

Your best weapon is documentation. Photograph the sorted load before delivery, keep the yard’s own price sheet criteria in mind, and for large loads, ask for the grade determination in writing on the ticket. If a yard’s grading seems systematically harsh compared to competitors, that is market information — take your future loads to the yard whose grader sees your material the way you do.

For high-value disputes (hundreds of dollars on copper or brass loads), get a second opinion before accepting: reload and visit another yard the same day. Prices move, but grading differences between yards are usually stable, and the second quote tells you whether the first grader was fair. Never let sunk fuel costs trap you into accepting a bad grade — the drive to yard two is cheap compared to a $300 downgrade.

Tools That Pay for Themselves in a Month

Manual scrapping has a equipment ladder, and each rung pays for itself quickly at real volumes. The magnet is rung zero — free from a junk drawer, and it prevents the costliest beginner error (mixing steel into non-ferrous). A digital hanging scale ($25–$40) lets you weigh loads at home so the yard’s scale never surprises you; discrepancies get questioned on the spot instead of discovered too late.

A manual wire stripper ($30–$80) handles occasional wire, but anyone stripping regularly should consider a drill-powered or bench wire stripping machine ($100–$300). At the $0.30–$0.60/lb upgrade from insulated to bare bright pricing, a machine processing 200 lbs of wire pays for itself in a single weekend. An angle grinder with cutoff wheels ($40–$70) makes short work of bolts, brackets, and oversized pieces that would otherwise drag down your grade.

For sorting, invest in labeled bins or gaylords — one per metal — because re-mixing sorted material is pure wasted labor. A hand truck and straps protect your back and your vehicle on heavy loads. And keep a basic test kit: a file for checking plated versus solid metals, and a small scale for weighing high-value items like copper and brass separately. Total investment for a serious setup runs $200–$400 — recoverable from a single good copper load’s grade improvement.

Grade Expectations by Source

Different scrap sources arrive at predictable grades, which helps you estimate honestly. New offcuts and factory surplus are typically 98–100% clean — the easiest money in scrapping. Renovation pull (wire, pipe, fixtures) usually lands at 90–96% after basic stripping. Demolition scrap runs 80–92% depending on how carefully it was pulled. Automotive scrap is the dirtiest common source at 70–88%, full of fluids, mixed metals, and attachments.

Use these benchmarks to sanity-check your own estimate before entering it in the calculator. If your demolition copper is “95% clean,” you are probably fooling yourself — and the yard’s grader will not be fooled. Honest grading protects you from the disappointment gap between expected and actual payout, and it tells you exactly how much prep work is economically justified.

Tips for Maximizing Grade-Adjusted Value

1. Grade your load before the yard does. Honest self-grading with the calculator removes surprises at the scale.
2. Attack the highest-value metal first. A point of grade on copper is worth far more than on steel — prioritize prep accordingly.
3. Strip all wire. Insulation is the most common grade-killer and the easiest to fix.
4. Remove every attachment. Bolts, screws, brackets, housings — if it is not the target metal, take it off.
5. Sort mixed metals ruthlessly. One foreign piece can downgrade a whole container. When in doubt, separate it out.
6. Clean and dry everything. Dirt and moisture are weight you haul but never get paid for.
7. Photograph the load. Documentation protects you if the yard’s grade seems unreasonably harsh.
8. Value your prep time. Compute the contamination loss first — then decide how much cleaning the dollars justify.

Frequently Asked Questions

1. What is a scrap value calculator?

It estimates your scrap’s true worth after accounting for cleanliness: full value, clean weight, grade-adjusted value, contamination loss, and effective value per pound.

2. What does clean material grade mean?

The percentage of your load that is pure, single-grade metal. 95% grade on 1,200 lbs means 1,140 lbs of payable metal and 60 lbs of contaminants.

3. How do I estimate my grade?

Be honest about attachments, coatings, dirt, and mixed material. Pristine sorted metal is 98–100%; typical demolition pull is 85–95%; messy mixed loads can be 70–85%.

4. Why does contamination cost so much on copper?

Because the loss scales with the metal’s price. Each lost percentage point on a $3.50/lb load costs $28 per 800 lbs — versus $7.80 on a $0.65/lb aluminum load of 1,200 lbs.

5. Can I dispute a yard’s grading?

You can ask for an explanation and a re-check, and a second yard’s opinion is always an option. Prevention — delivering a clean, sorted load — beats disputes every time.

6. Does wet scrap weigh more?

Yes, and yards know it. Some deduct for moisture explicitly. Deliver dry material to avoid paying to haul water.

7. What is “irony” aluminum or “irony” copper?

Industry slang for aluminum or copper contaminated with iron/steel attachments. It prices far below clean grades — another reason to remove attachments.

8. Should I clean steel scrap too?

Lightly. Steel’s low price means prep time rarely pays — focus cleaning effort on copper, brass, and aluminum where grade points are worth real money.

9. How does the magnet test work?

A magnet sticks to ferrous metals (steel, iron) but not to copper, brass, aluminum, or stainless. It is the fastest way to find hidden steel contamination.

10. Do yards pay for the contaminants?

No — attachments and dirt are dead weight. Worse, they can trigger a grade downgrade that reduces the price on the clean portion too.

11. What grade does stripped wire get?

Fully stripped, clean copper wire earns bare bright — the top grade. Partially stripped or burnt wire grades lower; burning insulation is also illegal in many places.

12. How much does sorting improve value?

Dramatically. A mixed load prices at the cheapest metal present; sorted loads each earn their proper grade. Sorting is the highest-ROI activity in scrapping.

13. Is 100% grade realistic?

For carefully prepared material, yes — clean stripped wire or sorted extrusions genuinely hit 98–100%. For demolition scrap, 90–95% is a good target.

14. Why did my effective price drop below the quote?

Grade. A $3.50 quote at 88% grade is effectively $3.08/lb on the scale weight. The calculator’s effective-value row shows this directly.

15. Should I process scrap as a business?

It can work with steady supply (contractors, demolitions) and efficient prep. Track grade-adjusted value per hour of labor — that number decides whether it is a hobby or a business.

CONCLUSION

The Scrap Value Calculator puts a dollar figure on cleanliness: full value versus grade-adjusted value, and the contamination loss in between. On cheap metals the loss is a nuisance; on copper it is hundreds of dollars. Sort it, strip it, clean it — then run the numbers above and watch the grade pay you back.