Automotive Calculators

Restoration Parts Cost Calculator

2026-09-24 7 min

Restoration parts total from NOS, reproduction and consumables with shipping and NOS share.

Parts Subtotal: $6800.00; $
Shipping: $544.00; $
Parts Total: $7344.00; $
NOS Share: 36.8; %

Calculator

NOS Parts($) Help

New old stock

Reproduction($) Help

Repro parts

Consumables($) Help

Fasteners, fluids, media

Shipping(%) Help

Freight percent

Results update live as you type

Live statistics

Parts Subtotal

$6800.00

Shipping

$544.00

Parts Total

$7344.00

NOS Share

36.8

Driving plans — pick your profile

Plans adjust the projected fuel use so estimates match how you actually drive. Your measured MPG stays untouched.

Results

Normal

Parts Subtotal

$6800.00$

Three classes

Shipping

$544.00$

Freight line

Parts Total

$7344.00$

Delivered parts

NOS Share

36.8%

Originality spend

Exact arithmetic on your inputs. Verify measurements and current rates for decision-grade figures.

Visualizations

Parts Total sensitivity

6,804x0.8

7,074x0.9

7,344x1.0

7,614x1.1

7,884x1.2

Restoration parts cost

7,344$

050,000

Formula

How Restoration Parts Cost Calculator is computed from its inputs, with every derived figure shown.

Total = (NOS + Repro + Consumables) x Plan x (1 + ShipPct)

Alternative Form

NOS share = NOS / subtotal x 100. Chrome and trim dominate surprises.

Variables

Symbol	Name	Unit	Description
N	NOS	$	Original parts
R	Repro	$	Reproduction
C	Consumables	$	Shop supplies
S	Shipping	%	Freight

Explanation

Class summation with freight multiplier.

Derivation

Class summation with freight multiplier.

Step-by-Step Calculation

Follow each step to understand how the result is calculated from your inputs.

Step 1

Set nos parts.

NOS Parts

Value:2500 $

Intermediate: 2500 $

Result: Accepted

Step 2

Set reproduction.

Reproduction

Value:3500 $

Intermediate: 3500 $

Result: Accepted

Step 3

Set consumables.

Consumables

Value:800 $

Intermediate: 800 $

Result: Accepted

Step 4

Set shipping.

Shipping

Value:8 %

Intermediate: 8 %

Result: Accepted

Step 5

Sum the classes, freight the total.

Total = (NOS + Repro + Consumables) x Plan x (1 + ShipPct)

NOS Parts:2500 $

Reproduction:3500 $

Consumables:800 $

Shipping:8 %

Intermediate: Sub = NOS + repro + consumables x plan

Result: Parts = $7344.00

Final Answer

$6800.00

Worked Examples

See how the calculator works with different scenarios.

Scenario

$2.5k NOS, $3.5k repro, $800 consumables.

Inputs

NOS Parts:2500 $

Reproduction:3500 $

Consumables:800 $

Shipping:8 %

Calculation

Apply the stated formula to the example inputs; the primary result follows the steps above.

Result

Parts Total $7344.00 $.

Interpretation

Near $7,344.

Understanding Your Result

Your Result: Parts Subtotal: $6800.00 $

Typical range: Driver classics hold steadier than project cars. Full body-off restorations commonly run deep five to six figures; buyer premiums 10 to 15 percent.

What This Means

Subtotal sums the three parts classes. Shipping applies the percent; NOS share shows originality spend.

Why It Matters

NOS parts cost multiples of repro. Class-split math prices originality before committing.

Professional Interpretation

Appraisers weight comparable sales, condition evidence and provenance paperwork above all. Pre-purchase inspections on a lift are never optional.

How the plan factor applies

Eco (x0.85), Balanced (x1.0) and Performance (x1.2) plans scale projected running-cost slices inside ownership totals.

Comps over rules

Segment curves guide; recent comparable sales decide.

Recommendations

•Grade-based values replace wishful pricing
•Parts-labor splits expose where budgets blow
•Fee-inclusive totals stop hammer-price illusions
•Investment framing forces honest return math

Learn — fuel economy, deeply

Classics trade on condition, documentation and originality more than on mileage. Calculators in this group value cars, model depreciation or appreciation, budget restorations down to parts and labor, price insurance, storage, fuel and auction fees, and frame collector purchases as investments.

1 · Where the gallon goes (energy path)

Engine heat

60–70% lost

Coolant + exhaust carry most energy away. Hybrids recover some via Atkinson cycle + regen.

Driveline

5–15% lost

Transmission, differential, accessories. CVTs and 8–10 speed autos lose less.

Aero drag

∝ v²

Doubles from 55→78 mph. Roof boxes hurt more than trunks.

Rolling + brakes

10–20%

Tires, weight, stops. Regen braking (hybrid/EV) reclaims city braking energy.

2 · What EPA / WLTP ratings actually mean

City cycle — stop-and-go, 21 mph average, idle included. Hybrids shine here (regen + engine-off).
Highway cycle — steady 48 mph average with gentle accelerations. Aero and gearing dominate.
Combined — 55% city + 45% highway weighting. The single number most drivers should compare.
Real-world gap — expect 5–15% below the sticker with normal driving; hypermilers can beat it, aggressive drivers miss by 25%+.
MPGe — 33.7 kWh = 1 gallon-equivalent. A 120-MPGe EV uses ~⅓ the energy per mile of a 35-MPG car.

3 · Factor-impact table — what moves your number most

Factor	Typical impact	Why
Speed above 55 mph	−5 to −25%	Aero drag rises with v². Each 5 mph over 55 ≈ +$0.30–0.50/gal equivalent.
Aggressive driving	−10 to −30%	Hard acceleration + braking wastes kinetic energy, especially in the city.
Under-inflated tires (−5 PSI)	−2 to −4%	Higher rolling resistance. Check monthly; pressure drops ~1 PSI per 10°F.
Roof rack / cargo box	−5 to −25%	Empty rails ≈ −5%; loaded box at highway speed up to −25%.
Excess weight (+100 lb)	−1 to −2%	Matters most in stop-and-go. Clean the trunk before long trips.
A/C at city speed	−5 to −15%	At highway speed A/C beats open windows (drag). Use recirculation.
Cold weather (20°F vs 77°F)	−10 to −20%	Rich warm-up mixture, thicker fluids, winter-blend fuel, heater load.
Clogged air filter / bad O2 sensor	−4 to −40%	A failed oxygen sensor alone can cut economy by up to 40%.
Idling	0 mpg	0.2–0.5 gal/hr burned standing still. Restart beats 30 s+ idling.
E10 → E85 fuel switch	−15 to −30%	Ethanol carries less energy per gallon; flex-fuel range drops accordingly.

Winter playbook

• Expect −10 to −20% on short trips; combine errands on one warm engine.
• Tires lose ~1 PSI per 10°F — re-inflate monthly.
• Idle 30 s max, then drive gently; cabin heat comes faster under light load.
• Winter-blend fuel has slightly less energy — a 2–3% seasonal dip is normal.

Summer playbook

• City: windows down under ~45 mph; highway: A/C + recirculation beats open windows.
• Park in shade; ventilate before blasting A/C.
• Hot asphalt softens tires — still check pressure, heat raises it.
• Roof cargo hurts most in summer road-trip season — move it inside or to a hitch carrier.

4 · Measure like a pro (the 3-tank protocol)

Fill to first click at the same pump, record the odometer (Tank 0).
Drive normally for 2–3 tanks; always refill to first click at the same pump.
MPG = total miles ÷ total gallons across all tanks — averaging kills pump-click noise.
Cross-check with the trip computer; a persistent >10% gap means the computer needs calibration — or the car needs service.
Log with an OBD-II dongle for per-trip MPG if you want to isolate commute vs. highway behavior.

Practical Tips

•Pay for a pre-purchase inspection always
•Document everything; records add value
•Match numbers and originality first
•Get agreed-value insurance in writing
•Store dry with battery and fuel care
•Sell with full photo and record packs

Common Mistakes

Budgeting without contingency

Surprises are the rule in old metal.

Over-restoring beyond market

Concours spend on driver-grade cars never returns.

Ignoring fees and transport

Premiums, shipping and import stack fast.

Insuring to the wrong value

Book value can strand a real loss.

Assumptions

This calculator makes the following assumptions to provide estimates:

Honest grading: Condition grades entered match inspection reality.

Available comps: Recent comparable sales exist.

Quoted rates: Labor, storage and fee rates hold.

Limitations

Be aware of these limitations when using this calculator:

Not an appraisal: Real deals need inspection and live comps.

Taste risk: Collector demand shifts by generation.

No fraud modelling: Titles, VINs and provenance need checks.

Frequently Asked Questions

Answers to common questions about this calculator.

How does the Restoration Parts Cost Calculator work?

Enter value, cost, fee or rate inputs as shown. The calculator applies comparable-based valuation, parts-plus-labor budgeting or fee stacking as stated in the formula.

Are the Restoration Parts Cost Calculator values appraisals?

No. They frame negotiations and budgets from comps and line items. Real deals need inspection, documentation checks and live market comps.

What moves the Restoration Parts Cost Calculator result most?

Condition grade, originality and documentation for values; hidden rust and trim specialists for restorations; premiums and transport for auction and import totals.

How should contingency be handled in the Restoration Parts Cost Calculator?

Carry 15 to 20 percent on restorations and 10 percent on purchase-plus-fee totals. Old cars hide needs.

Does the Restoration Parts Cost Calculator cover fees and taxes?

Fee, premium, duty, VAT, transport and registration lines are included where stated. Confirm local rates before bidding.

How is a classic car valued?

Recent comparable sales adjusted for condition grade, originality, matching numbers, documentation and provenance.

Do classic cars depreciate?

Drivers do until collector interest catches them, typically after 20 to 30 years for the right models. Most never fully recover costs.

What does a restoration cost?

Parts plus book labor plus contingency plus paint, chrome and trim specialists. Six figures is normal for full body-off work.

How is restoration ROI figured?

Net sale proceeds minus all-in cost over all-in cost. Include purchase, parts, labor, fees, storage and selling costs.

How should a collector car be insured?

Agreed-value policies that pay the stated figure on total loss, with mileage and storage terms in writing.

Are collector cars good investments?

A few beat inflation; most trail index funds after costs. Buy the car you love with eyes-open math.

What do auctions charge?

Buyer premiums near 10 to 15 percent plus entry, transport and sometimes seller commission. Hammer price is never the total.

What does importing a classic cost?

Purchase plus shipping plus duty plus VAT or GST plus broker, compliance and registration lines. Age can cut duty in some regimes.

How much does classic storage cost?

From home garage marginal cost to hundreds monthly for climate-controlled units with battery, fuel and tire care.

Related Calculators

Explore more calculators related to this topic.

Related Guides

Deepen your understanding with these educational resources.

Collector Buying Guide

Inspection, documentation and value factors

Restoration Budget Guide

Parts, labor, contingency and fee planning

Glossary

Technical terms used in mortgage calculations explained in plain language.

MPG: Miles per gallon. Distance travelled per gallon of fuel; higher is better. US gallon = 3.785 L.
L/100 km: Litres consumed per 100 kilometres; lower is better. Standard metric efficiency unit.
MPGe: Miles per gallon-equivalent. EV metric: miles travelled on 33.7 kWh (energy of 1 gal of gasoline).
CAFE: Corporate Average Fuel Economy — US fleet-average efficiency standard enforced by NHTSA.
Rolling resistance: Energy lost deforming tires as they roll. Low-pressure or wide tires raise it.
Aerodynamic drag: Air resistance growing with the square of speed — why highway MPG falls fast above 60 mph.
Hypermiling: Driving techniques (coasting, steady speed, anticipation) that maximise real-world MPG.
OBD-II: On-board diagnostics port. Scanners and dongles read live MPG, fuel trim and fault codes.
Condition grade: 1 (concours) to 4 (driver) scale that anchors comparable pricing.
Matching numbers: Original major components per factory records. Adds provenance value.
Agreed value: Insured figure paid on total loss. Set in writing, not book value.

Authoritative References

Trusted sources and standards referenced by this calculator.

EPA — FuelEconomy.gov DOE — Fuel-Efficient Driving Tips NHTSA — Driving Safety & Efficiency SAE International — Fuel Economy Standards Consumer Reports — MPG Truth IRS — Standard Mileage Rates

Applicable Standards

EPA Fuel Economy Testing (40 CFR Part 600)CAFE — Corporate Average Fuel Economy Standards (NHTSA)WLTP — Worldwide Harmonised Light Vehicle Test ProcedureSAE J1321 / J1711 — Fuel consumption test proceduresISO 2575 — Road vehicles symbols & efficiency markings

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Last Updated:

2026-09-24

Version:

2.0.0

References:

License:

Free to use for educational and professional purposes.

How you compare — vehicle class averages

Class	Combined MPG	City / Hwy	Fuel / 12k mi	Cost @ $3.50	CO₂ / yr
Compact sedan	34	30/40	353 gal	$1,235	3.1 t
Midsize SUV	25	22/29	480 gal	$1,680	4.3 t
Pickup truck	19	17/23	632 gal	$2,211	5.6 t
Hybrid sedan	49	50/47	245 gal	$857	2.2 t
EV (MPGe)	115	125/105	— (electric)	$550	1.1 t

Combined averages blend EPA city/highway cycles. EV row shows MPGe and home-charging cost; tailpipe CO₂ is zero, grid CO₂ ≈ 1.1 t/yr.

Maintenance checklist

Tick off what you already do — your car scores 1/6 (17%).