EnviroCheck — the New Zealand company that pioneered baseline methamphetamine property testing in 2011 — has launched the MethShield Auto Vehicle Meth Testing Calculator, a free online tool that lets vehicle owners, insurers, fleet managers and used-vehicle buyers enter a laboratory methamphetamine result and vehicle category to explore modelled smoke-dose equivalents based on vehicle cabin volume.
The calculator is the latest addition to EnviroCheck's patent-pending MethShield Auto programme, which combines vehicle meth testing, baseline monitoring and visible deterrence for New Zealand cars, SUVs, vans and trucks. It addresses a common gap in the market: vehicle owners who receive a laboratory methamphetamine result often have no straightforward way to contextualise what that number means in the confined space of a vehicle cabin.
Why a Vehicle Calculator Matters
A laboratory methamphetamine surface-residue result is reported in micrograms per 100 square centimetres (µg/100 cm²). On a large property wall, a given reading spreads across a much larger surface area than it does inside a vehicle cabin, where the air volume is a fraction of a room. The same numerical result can represent a very different level of contamination depending on where it was collected.
The MethShield Auto Calculator takes a laboratory result and a vehicle category — small car, medium car, large car/SUV, van or truck — and uses cabin volume to produce an approximate modelled smoke-dose equivalent. This gives vehicle owners, insurers and fleet managers a starting point for understanding what a result might mean in the context of their specific vehicle.
How the Calculator Works
The calculator is free to use and runs entirely online. Users enter their laboratory methamphetamine result, select their vehicle category and sampling type, and the tool returns an approximate modelled figure.
Enter your lab result
Type in your laboratory methamphetamine reading in µg/100 cm². The calculator processes it instantly.
Choose your vehicle category
Select from small car, medium car, large car/SUV, van or truck. Vehicle cabin volume is a key input.
Modelled smoke-dose equivalents
The calculator returns an approximate modelled smoke-dose equivalent figure based on vehicle volume and your reading.
Print or save your summary
Results can be printed or saved as a summary for your records, your insurer or your fleet manager.
Five Vehicle Categories Supported
The calculator supports five common vehicle categories, each with a modelled cabin volume used in the calculation:
Small car
Compact / hatchback
Medium car
Sedan / small SUV
Large car / SUV
Large SUV / wagon
Van
People mover / cargo van
Truck
Truck cab
An Estimate — Not a Confirmed Contamination Level
The calculator produces an approximate modelled figure. Vehicle sizes and interior volumes vary between makes and models, and calculations are subject to a margin of error. Results are estimates only and should not be treated as confirmed contamination levels.
The modelled smoke-dose equivalent does not establish how many times methamphetamine was actually smoked in a vehicle. It is a contextualisation tool — not a substitute for professional assessment by a qualified sampler. Where confirmation is required, EnviroCheck provides independent vehicle meth testing nationwide.
Who the Calculator Is For
The tool is built for anyone who receives a vehicle methamphetamine laboratory result and wants to understand what it might mean in the context of their vehicle's cabin volume.
Part of the MethShield Auto Programme
The calculator sits within EnviroCheck's patent-pending MethShield Auto programme (NZ Patent Application No. 818430). MethShield Auto combines vehicle meth testing, baseline monitoring and visible deterrence — extending the MethShield property concept to New Zealand vehicles, where confined cabin space, driver turnover and recovered-vehicle contamination create a documented risk for owners, insurers and fleet operators.
EnviroCheck's history in methamphetamine testing reaches back to 2011, when founder Todd Sheppard pioneered surface-residue testing for the emerging New Zealand property-testing market. The company tests and advises only — it does not remediate — so its results serve the client, not a cleanup invoice.
What to Do Next
If you have a laboratory result: Visit the MethShield Auto page and use the calculator to explore your modelled result.
If you need a vehicle tested: EnviroCheck provides independent vehicle meth testing nationwide — for cars, SUVs, vans, trucks and commercial fleets.
If you are a journalist: EnviroCheck can provide background on the MethShield Auto calculator and what it means for vehicle owners, insurers and fleet managers interpreting laboratory methamphetamine results.
Try the MethShield Auto Vehicle Meth Testing Calculator
Free to use. Enter your laboratory result and vehicle category to explore modelled smoke-dose equivalents.
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This press release is provided for general informational purposes only and does not constitute professional advice, testing, or a recommendation about any specific vehicle. The MethShield Auto Vehicle Meth Testing Calculator produces approximate modelled estimates only and does not confirm contamination levels or establish actual smoking events.