Odor Testing & Olfactometry Calculators
Free, practical tools for odour assessment — convert dilution ratios to odour concentrations, size dilution steps, compute emission rates, reduce a panel to a group threshold, plan ventilation, and screen separation distances.
Odor Concentration Calculator
Convert a dilution-to-threshold ratio into an odour concentration in European odour units per cubic metre, the way EN 13725 olfactometry defines it.
Dilution Ratio Calculator
Work out an olfactometer's dilution factor from its clean-air and sample flows, and the concentration it presents to the panel.
Odor Emission Rate Calculator
Multiply an odour concentration by a source's volumetric air flow to get its Odour Emission Rate in ouE/s, with m³/s, m³/min and m³/h handling.
Detection Threshold Calculator
Combine a panel's individual threshold estimates into a group threshold as the geometric mean, following EN 13725.
Ventilation Dilution Calculator
From a room's volume and air changes per hour, get the clean-air flow, steady-state odour concentration, and the time to purge a space.
Odor Impact Distance Estimator
A screening estimate of the separation distance at which a source's odour falls to an acceptance criterion, from its emission rate.