Environmental Chemistry Calculators

Environmental chemistry calculators provide essential computational tools for pollution monitoring, water quality assessment, risk analysis, and environmental impact evaluation. These specialized calculators help students, researchers, and environmental professionals analyze contaminant levels, calculate treatment efficiencies, and assess ecological risks with precision and accuracy.

Use comprehensive environmental chemistry tools for BOD/COD determinations, pollutant degradation studies, water hardness calculations, and toxicity assessments. Each calculator implements fundamental environmental principles including mass balance, risk quotient analysis, and water quality parameters to support accurate environmental monitoring and regulatory compliance.

⚠ Disclaimer: This calculator provides results based on standard formulas and simplified assumptions. It is intended for educational purposes only and should not be used for professional, medical, industrial, or experimental applications without expert verification.

Pollutant ppm Calculator

Pollutant mass (mg) Solution volume (L)

ppm = mg ÷ L

Wastewater Concentration Calculator

Mass (mg) Volume (L)

Dilution Factor Calculator

Initial conc. (mg/L) Final conc. (mg/L)

Chemical Oxygen Demand (COD) Calculator

O₂ consumed (mg) Sample volume (L)

Biochemical Oxygen Demand (BOD) Calculator

DO initial (mg/L) DO final (mg/L)

Effluent Treatment Efficiency

Influent conc. (mg/L) Effluent conc. (mg/L)

Soil Pollutant Concentration

Pollutant mass (mg) Soil mass (kg)

Groundwater Contaminant Level

Pollutant mass (mg) Water volume (L)

Air Pollutant Emission Rate

Mass emitted (g) Time (h)

Atmospheric Concentration from Emission

Emission mass (g) Air volume (m³)

Risk Quotient Calculation

Exposure conc. (mg/L) Toxicity threshold (mg/L)

RQ = Exposure ÷ Threshold

Toxicity Unit Calculation

Concentration (mg/L) LC50 (mg/L)

TU = (Conc ÷ LC50) × 100

Bioaccumulation Factor

Organism conc. (mg/kg) Water conc. (mg/L)

BAF = Organism ÷ Water

Half-life of Pollutant in Environment

Initial conc. (C₀) Final conc. (Ct) Time (days)

t½ = (t × ln2) ÷ ln(C₀/Ct)

Degradation Rate Constant Calculator

Half-life (days)

k = ln2 ÷ Half-life

Neutralization Requirement Calculator

Acid conc. (M) Acid volume (L) Base conc. (M)

V₂ = (C₁V₁) ÷ C₂

Acid Rain pH Estimator

[H⁺] (mol/L)

pH = -log₁₀[H⁺]

Water Hardness Calculation

[Ca²⁺] (mg/L) [Mg²⁺] (mg/L)

Hardness = 2.5×Ca + 4.1×Mg (mg/L as CaCO₃)

Conductivity from Ion Concentration

Ion conc. (mmol/L) Molar conductivity (S·cm²/mol)

κ = Λm × c

Salt Content in Water

Salt mass (g) Water volume (L)

Salt Content = g/L