CNC Price Estimation Tool: Instant STP File Cost Calculator for Turning, Milling & Laser Cutting delivers instant manufacturing cost estimates from uploaded STP/STEP files. It analyzes part geometry to compute mass, machining time, weight, and total costs across processes.

How It Works

Upload your STP/STEP CAD file to the tool, which automatically analyzes the 3D geometry in under 60 seconds. It calculates part mass/weight, estimates cycle times for turning (CNC lathe), milling (CNC machining), and laser cutting, then generates a detailed cost breakdown including material, setup, and production rates. No emails, logins, or delays—results appear instantly for quick comparisons.

Limitations

This is a rapid estimation tool for designers, providing ballpark costs based on geometry analysis (e.g., pockets, holes, walls). It does not account for material-specific properties, custom setups, or full feedback unless upgraded. For precise quotes reading technical drawings (tolerances, GD&T, threads), use the OCR-powered pro version.

Value

Engineers gain instant insight into project viability, optimizing designs for cost before production (e.g., choosing milling vs. laser). It saves hours on manual quoting, supports RFQs/prototyping bids, and bridges CAD-to-shop floor gaps noted in mechanical design challenges.

Unlike generic calculators needing manual inputs, this AI-driven tool uses real STP geometry for process-specific estimates (turning/milling/laser) in seconds—free and tailored for mechanical designers. Pro OCR version uniquely extracts GD&T/tolerances/threads from drawings for production-grade accuracy.

Target Audience

Mechanical engineers, product designers, CAD users (SolidWorks/Inventor dominant), and machine shops needing fast prototyping/RFQ estimates.

Sign-up and try the CNC Price Estimation Tool now—upload your STP file for instant turning, milling, or laser cutting costs in 60 seconds.

How It Works

A fast, transparent online tool for estimating the manufacturing cost of CNC-machined, turned, laser-cut and sheet-metal parts directly from your 3D file (STEP / STP).

Built for designers, engineers, buyers and small workshops who need a realistic price in seconds, not days.

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What the app does

1. You upload a 3D file (.step / .stp) of your part.
2. The app automatically reads the geometry — overall dimensions (bounding box), volume, max diameter, surface count.
3. You pick the manufacturing technology (CNC milling, CNC turning, laser cutting, sheet-metal bending, …).
4. You pick the material from an international database (steel, stainless, aluminium, brass, bronze, plastics — with European, US, German and Japanese cross-references).
5. The app instantly returns a complete cost breakdown: material, machining time, setup, programming, finishing, margin and final unit price for the chosen quantity.
6. You can export the report as a localised HTML file to share with your customer or supplier.

Everything runs in your browser. No login is required to get a quote — only the optional calibration / saving features need an account.

All prices are estimations. They are meant to give a realistic order of magnitude for budgeting, design-to-cost decisions and supplier comparison — not a binding offer.

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How the pricing algorithm works

The final price is built up from physical reality (geometry + material) and a few well-defined manufacturing factors. Nothing is a black box — every number on screen can be traced back to a formula.

Step 1 — Raw stock (the blank you start from)

After the 3D file is loaded, the app detects the part’s bounding box and suggests a commercial stock shape: round bar, square bar, tube, plate or block.

• You can accept the automatic suggestion or pick the shape yourself.
• The chosen stock defines how much material is actually bought — and therefore how much has to be removed by machining.

Material to remove  =  Stock volume  −  Final part volume

Step 2 — Material cost

Material cost  =  Stock volume × Density × Price per kg

Density and base price come from a built-in material database (≈ 40 grades). The base price is in PLN and is then converted to your active regional currency.

Step 3 — Machining time

This is where the engine differs from a simple “price per kg” calculator. Cutting time is computed from real engineering formulas, per stage (roughing + finishing), using parameters that depend on the chosen material:

For milling (tool diameter is constant):

Feed rate vf  =  n × fz × z
MRR (material removal rate) = ae × ap × vf
Cutting time = Volume to remove / MRR

For turning (the workpiece diameter changes as the tool moves in):

Modern CNC lathes use Constant Surface Speed (CSS / G96), which automatically adjusts spindle rpm to keep the cutting speed Vc constant. The app does the same:

MRR (turning)  =  Vc × 1000 × f × ap        [mm³/min]
Cutting time   =  Volume to remove / MRR
Reference rpm  =  Vc × 1000 / (π × D)       (shown for information)

This makes the turning estimate independent of diameter — exactly how a real lathe behaves. A warning is raised if the required rpm at small diameters would exceed a typical machine limit (≈ 6 000 rpm).

The total machining time is then:

Machining time  =  Cutting time + Idle time (tool changes, repositioning, measuring)

Step 4 — Programming and setup

• Programming time — one-off cost of writing the CNC program, spread over the batch.
• Setup cost — clamping the stock, zeroing the tools, first-piece check.

Both can be entered either with a slider or directly in hours (useful for long jobs > 8 h or when you have a real value from a quote).

Step 5 — Quantity effect

Programming and setup are fixed per batch, so the per-piece cost drops as quantity grows. Prototype runs (qty = 1) are charged with a higher multiplier than series runs.

Step 6 — Region and currency

Final price  =  Base price (PLN)
              × Material-group factor
              × Regional multiplier (labour, energy, market level)
              × Currency rate

Switching the region instantly recalculates labour rates, energy cost, market margin and currency — without rounding errors, because the core engine always works in the active regional currency.

Step 7 — Margin

A configurable markup % is applied on top of the manufacturing cost to give the final selling price.

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What you see on screen

• Cost breakdown — material, machining, programming, setup, finishing, margin, unit price, total price.
• Engineering details — every formula with the substituted numbers, so you can audit the result.
• Warnings — if a parameter looks unrealistic (e.g. rpm too high for a small diameter, ap too large for the tool, removal volume suspiciously small).
• Charts — time and material distribution per stage.

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What the app is not

• It is not a binding quotation — a real shop will always refine the price based on fixturing, surface finish, tolerances and their own machine park.
• It is not a CAM system — it does not generate G-code.
• It does not replace an experienced CNC programmer for complex 5-axis or multi-setup parts; it gives a realistic baseline.

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Who it is for

• Product designers — compare two design variants or two technologies (mill vs. turn vs. laser) in seconds.
• Buyers / procurement — sanity-check supplier quotes before negotiating.
• Small workshops — answer “how much?” on the phone without opening CAM software.
• Engineering students & trainers — see the impact of cutting parameters, material choice and quantity on the final price, with all formulas visible.

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Languages and regions

The interface is available in 12 languages (EN, PL, DE, FR, IT, PT, TR, JA, KO, ZH-TW, TH, HI) and supports multiple regional markets with their own labour rates, energy cost and currency.

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Try it now

Upload a STEP file and get your first estimate in under a minute – free register