PPM to PPB is a free, precision-built online tool for converting concentration units used in analytical chemistry, environmental science, water quality testing, and pharmaceutical analysis.
Our Mission
We provide the most accurate and user-friendly concentration conversion tools available online. Our converters are used by scientists, engineers, researchers, and students across the globe.
What We Offer
- PPM to PPB Converter — Instant conversion with real-time visualization
- 7 Specialized Calculators — Dilution, weight-based, volume-based, and chain conversions
- Comprehensive Reference Tables — PPM, PPB, PPT, mg/L, µg/L conversion charts
- Educational Content — Step-by-step guides, real-world examples, and FAQ
- Interactive Visualizer — See how PPM and PPB relate through particle simulation
Accuracy & Standards
Our conversions use the exact mathematical relationship between concentration units as defined by the International System of Units (SI). The PPM to PPB conversion factor of 1,000 is exact — zero rounding error applies.
Our reference data aligns with standards published by the EPA (Environmental Protection Agency), WHO (World Health Organization), NIST (National Institute of Standards and Technology), and ISO (International Organization for Standardization).
Contact Us
Have questions, feedback, or suggestions? Visit our contact page to get in touch.