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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Enter decimal:

Enter percentage: %

Enter permille: ‰

Enter ppm: ppm

Enter mg/L: mg/L

Enter ppb: ppb

Enter ppt: ppt

PPM conversion result

0 PPM = 0% = 0 mg/L = 0 ppb = 0 ppt

PPM	Percentage (%)	mg/L	ppb	Use Case
0.5	0.00005%	0.5	500	Chlorine (Drinking Water)
1.0	0.0001%	1.0	1,000	Fluoride (Drinking Water)
10	0.001%	10	10,000	Lead (Safe Level)
50	0.005%	50	50,000	Nitrate (Drinking Water)
100	0.01%	100	100,000	Sulfate (Drinking Water)
500	0.05%	500	500,000	Total Dissolved Solids
1000	0.1%	1000	1,000,000	Salinity (Brackish Water)
35000	3.5%	35000	35,000,000	Ocean 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).