12 free tools · no sign-up
Legionella tools & calculators
Practical tools to answer the questions that come up first, and to do the small calculations that otherwise mean a spreadsheet and a guess. None replaces a competent risk assessment, but they will point you the right way.
Calculators
Quick numbers for real jobs, volumes, doses, flushing and turnover.Calculator
Tank & pipe water volumeLitres in a tank or pipe run, the figure you need for dosing, flushing or drain-down.Open toolCalculator
Chlorination doseHow much product to reach a target chlorine concentration. A planning aid, with the safety caveats.Open toolCalculator
Cold storage turnoverDoes your stored cold water turn over fast enough to avoid stagnation?Open toolCalculator
Outlet flushing timeThe standing water in a little-used branch, and how long to flush it through.Open toolChecker
Temperature danger-zone checkerWhere a stored or outlet temperature sits against the control figures.Open toolRisk & compliance
Work out what the law expects and where your programme stands.Checker
Do I need a risk assessment?Whether UK law expects a Legionella risk assessment for your situation.Open toolQuestionnaire
Risk-rating calculatorAn indicative low / medium / high rating for your building, and what to prioritise.Open toolChecklist
Compliance self-checkScore your readiness and see the gaps an inspector or auditor would notice.Open toolRecommender
Which solution do I need?Risk assessment, remote monitoring or a digital logbook, what actually fixes your problem.Open toolPlanning & records
Turn duties into a schedule, and keep track of when things are due.Builder
Monitoring schedule builderA typical monitoring schedule built from the systems you actually have.Open toolCalculator
RA review-date calculatorWhen your Legionella risk assessment is due a review, and what means review it now.Open toolOn l8log.com
Monitoring savings calculatorManual monitoring versus remote sensors, in time and cost.Open on l8log.comHealth & exposure
For anyone worried about the illness itself, not the building.Every tool is a planning aid based on recognised UK guidance, not legal, medical or design advice, and not a substitute for a competent, site-specific risk assessment. Calculations use the dimensions and figures you enter, check them on site.
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"Free Legionella tools & calculators." Legionella.io. https://legionella.io/tools/
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