Die Casting Cost Calculator
This calculator uses the same first-hand factory rates published in our Q3 2026 cost index — real alloy prices, real machine rates by tonnage, real CNC rates — and does the arithmetic a quotation actually uses. Set the alloy, part weight, machine size, cavity count and how much machining the part needs, and it returns a per-part range with the metal, machine and machining lines shown separately.
It is a sanity check, not a quote. It deliberately leaves out tooling (a capital cost amortised across your program), finishing, packaging and freight, and it cannot know your part's real cycle time or geometry. What it does give you is the shape of the cost — enough to tell whether a number you have been handed is plausible, and enough to see which lever actually moves it.
How do you calculate die casting cost per part?
Die casting cost per part = metal (shot weight × alloy rate) + machine (per-shot machine rate ÷ cavity count) + machining (spindle hours × rate), with tooling amortised separately across the program and finishing quoted on top. This calculator runs that arithmetic on the real Q3 2026 rates published in our cost index — our own factory's figures, not estimates — so you can sanity-check any quote in about a minute.
At a glance
- Runs on our real published Q3 2026 factory rates, not estimates
- Shows metal, machine and machining as separate lines
- Excludes tooling, finishing and freight — and says so
- A sanity check for any quote, ours or a competitor's
What the Calculator Actually Does
Metal cost comes from the shot, not the part. The calculator multiplies your part weight by 1.35 to allow for the runner and overflow — metal that gets recycled but still has to be melted and cast on every shot — then applies the published price for the alloy you chose. This is why a small part in an expensive alloy is rarely where the cost lives.
Machine cost is per shot, divided by cavities. Our index publishes the machine rate per shot for each clamping tonnage. A four-cavity die divides that rate across four parts, which is why cavity count is one of the biggest levers a buyer has — and why an over-sized machine quietly inflates every part you will ever buy. Change the cavity count in the calculator and watch what happens.
Machining is spindle time at the published rate. Axis count matters: a 5-axis hour costs roughly double a 3-axis hour, so a feature that forces a 5-axis setup can cost more than the metal in the part. That is the arithmetic behind 'cast near-net, machine only what earns it'.
What it deliberately omits: tooling, finishing, packaging, freight and margin. Tooling especially — a die is a capital cost spent once and spread across the program, which is why the same part is expensive at a thousand pieces and cheap at a hundred thousand. Any calculator that folds tooling into a per-part number without knowing your volume is guessing.
How to Use It Against a Quote
Run your part's numbers, then compare the shape rather than the total. If a supplier's price is far below the metal line alone, something is wrong — either the alloy is not what you think, the weight is off, or costs are being recovered elsewhere later. If it is far above, ask which line explains the gap: machine size, cavity count, machining, or margin.
Then ask the questions the calculator makes obvious. What machine tonnage is my part running on, and why that size? How many cavities, and what would two more cost in tooling versus save per part? Which features are machined, and could any of them be cast? A supplier who can answer those is quoting from a real process plan. One who cannot is quoting from a feeling.
The rates behind every line are published openly in our cost index, updated quarterly. That is unusual, and deliberate: a buyer who understands the cost structure designs better parts and negotiates better programs, and we would rather compete on engineering than on opacity.
Frequently Asked Questions
Is this an accurate quote for my part?
No, and it does not pretend to be. It is a directional estimate covering metal, machine time and machining at our published rates. It cannot know your part's real cycle time, the actual cavity layout a tool would use, geometry that changes fill, or your finishing spec — and it excludes tooling, finishing, packaging and freight entirely. Use it to sanity-check a number, then send the part for a real quotation.
Why does the estimate exclude tooling?
Because tooling is a capital cost spent once and amortised across your program, so its per-part contribution depends entirely on volume — the same die is expensive across 1,000 parts and negligible across 500,000. Folding it into a per-part figure without knowing your quantity would produce a confident-looking number that is simply wrong. Our tooling cost page explains what drives the die itself.
Where do the rates come from?
From our own factory. Alloy prices, machine rates by clamping tonnage and CNC rates are the Q3 2026 figures published in the SunOn Die Casting Cost Index — first-hand data from the Dongguan floor, not market estimates. USD figures convert at ¥6.76/USD as of 8 August 2026 and will drift with the exchange rate.
How do I know which machine tonnage my part needs?
The calculator suggests a size from the shot weight, and flags it when your part looks too large for the machine selected. Real machine selection depends on projected area and the pressure the part needs, not weight alone, so treat the suggestion as a starting point. Machine fit is confirmed properly at the engineering review — send the model and it takes an engineer minutes.
Why does cavity count change the price so much?
Because the machine rate is charged per shot, and one shot fills every cavity in the die. Doubling cavities roughly halves the machine cost per part — but a bigger, more complex tool costs more up front and takes longer to build. The right cavity count is the one where tooling investment and per-part saving balance against your annual volume, which is exactly what the engineering review works out with you.
Where to Go Next
From estimate to quote
Check the Estimate Against the Real Part
Send the model, the alloy and the annual volume. You will get a quotation built from these same lines — metal, machine, machining, finishing and tooling — with the working shown.
Last reviewed August 2026 · Inox Die Cast, Dongguan