Parts Per Converter

Convert between parts per notation including ppm, ppb, ppt, percent, and more.

Value

From

1 ppm =

1,000

Parts per billion (ppb)

1 ppm in all units

Parts per million (ppm)1

Parts per billion (ppb)1,000

Parts per trillion (ppt)1,000,000

Parts per quadrillion (ppq)1.000000e+9

Percent (%)0.0001

Per mille (permille)0.001

Milligram per kilogram (mg/kg)1

Milligram per liter (mg/L)1

Microgram per gram (ug/g)1

Microgram per liter (ug/L)1,000

1 ppm

= 1,000 ppb

1 ppb

= 1,000 ppt

= 10,000 ppm

1 ppm

= 0.0001%

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MyCalcBuddy Editorial Team

This page is maintained as an educational calculator reference.

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Formula Source: NIST Guide to SI Units

by National Institute of Standards

ðŸ”„Last reviewed: May 2026

âœ“Formula checks are based on standard references and internal QA review.