PPM Concentration Calculator

Convert between various concentration units in real-time and calculate dilutions.

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Dilution Calculator (C₁V₁ = C₂V₂)

Common Concentration References

Item	PPM	PPB	%
Tap Water Chlorine	0.2 - 4.0	200 - 4,000	0.00002 - 0.0004
CO Safety Limit	9	9,000	0.0009
Alcohol Legal Limit	300	300,000	0.03
Pool Chlorine	1 - 3	1,000 - 3,000	0.0001 - 0.0003

GUIDE

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Definition and Meaning of PPM

PPM (Parts Per Million) represents one part per million. 1 ppm = 0.0001% = 1mg/L (in water). For example, 1mg of substance dissolved in 1L of water (1,000,000mg) equals 1 ppm. Widely used for air pollutants, water quality testing, chemical solutions, and food additive concentrations.

PPM Unit Conversion Formulas

PPM unit conversions: 1 ppm = 0.0001%. Example: 5,000 ppm = 0.5%, 10,000 ppm = 1%. 1% = 10,000 ppm. Example: 5% = 50,000 ppm. 1 ppm = 1,000 ppb. Example: 0.5 ppm = 500 ppb.

Water Quality Standards and PPM

Korean drinking water quality standards using PPM/PPB. Residual Chlorine: 0.2-4.0 ppm (mg/L) recommended. Lead (Pb): 10 ppb (0.01 mg/L) or less. Arsenic (As): 10 ppb (0.01 mg/L) or less.

Air Pollution and PPM

Air pollutant concentrations in PPM. Carbon Monoxide (CO): indoor safety standard 9 ppm (8-hour average) or less. 50 ppm or more: headache, dizziness. 200 ppm or more: impaired consciousness. 1,000 ppm or more: fatal.

Dilution Calculation (C₁V₁ = C₂V₂)

Dilution formula: C₁V₁ = C₂V₂. C₁ = initial concentration, V₁ = initial volume, C₂ = final concentration, V₂ = final volume. Example 1 (Lab Dilution): To dilute 1,000 ppm solution 10 mL to 100 ppm: C₁V₁ = C₂V₂ → 1,000 × 10 = 100 × V₂ → V₂ = 100 mL. Add 90 mL water.

PPM Measurement Methods and Applications

Main methods for measuring PPM concentration. TDS Meter (Total Dissolved Solids): measures total dissolved solids in water in ppm. Used for water purifier performance checks and aquarium management. Tap water is usually 50-200 ppm, purified water is below 10 ppm.

Frequently asked questions

What is 1 ppm in percent?

1 ppm equals 0.0001%, so 10,000 ppm is 1%.

Is ppm the same as mg/L?

For water (density ~1g/mL), 1 ppm equals 1 mg/L. For other liquids with different densities, the two units are not exactly equal.

How do I use the C1V1 = C2V2 dilution formula?

Multiply your initial concentration (C1) by initial volume (V1), divide by your target final concentration (C2) to get final volume (V2), then add water equal to V2 minus V1.

What ppm of chlorine is safe in tap water?

A range of about 0.2-4.0 ppm (mg/L) is typically recommended — see the reference table in the calculator for common concentrations.

What's the difference between ppb and ppm?

1 ppm equals 1,000 ppb. Ppb is used for measuring trace contaminants like heavy metals that occur at much lower concentrations than ppm can conveniently express.