Convert Parts Per Million (PPM)

Professional PPM converter with instant processing. Convert between PPM, percentage, mg/L, ppb, and ppt instantly.

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%
ppm
mg/L
ppb
ppt

PPM conversion result

0 PPM = 0% = 0 mg/L = 0 ppb = 0 ppt
PPM Percentage (%) mg/L ppb Use Case
0.50.00005%0.5500Chlorine (Drinking Water)
1.00.0001%1.01,000Fluoride (Drinking Water)
100.001%1010,000Lead (Safe Level)
500.005%5050,000Nitrate (Drinking Water)
1000.01%100100,000Sulfate (Drinking Water)
5000.05%500500,000Total Dissolved Solids
10000.1%10001,000,000Salinity (Brackish Water)
350003.5%3500035,000,000Ocean Salinity
Conversion Formulas
  • Decimal to PPM:
  • PPM = Decimal × 1,000,000
  • PPM to Decimal:
  • Decimal = PPM ÷ 1,000,000
  • PPM to Percentage:
  • % = PPM ÷ 10,000
  • PPM to Permille:
  • ‰ = PPM ÷ 1,000
  • PPM to mg/L:
  • mg/L = PPM × 1 (for water)
  • Percentage to PPM:
  • PPM = % × 10,000
  • Permille to PPM:
  • PPM = ‰ × 1,000
  • PPM to ppb:
  • ppb = PPM × 1,000
  • ppb to PPM:
  • PPM = ppb ÷ 1,000
  • PPM to ppt:
  • ppt = PPM × 1,000,000
  • ppt to PPM:
  • PPM = ppt ÷ 1,000,000

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Frequently Asked Questions

PPM stands for parts per million. It is a unit of concentration that means how many units of a substance are present in one million units of a mixture. For example, 50 ppm means 50 parts of a substance in 1,000,000 parts of total solution.
To convert PPM to percentage, divide by 10,000. For example: 500 ppm ÷ 10,000 = 0.05%. To convert percentage to PPM, multiply by 10,000: 0.05% × 10,000 = 500 ppm.
PPM (parts per million) and PPB (parts per billion) are both concentration units. 1 PPM = 1,000 PPB. PPB is used for even smaller trace amounts, such as measuring contaminants in drinking water or air quality standards.
For water and dilute aqueous solutions, 1 PPM is approximately equal to 1 mg/L (milligrams per liter). This equivalence holds when the solution density is close to 1 g/mL, which is true for most water-based solutions.
1 PPM is equal to: 0.0001% (percentage), 0.001‰ (permille), 1 mg/L (in water), 1,000 PPB (parts per billion), and 1,000,000 PPT (parts per trillion).
PPM is widely used in environmental monitoring (air and water quality), food safety (trace additives and contaminants), chemistry (solution concentrations), electronics (impurity levels in semiconductors), and medicine (drug concentrations in the body).