Question: 1 ppm equal to how many microgram?
Answer: ppm↔ug/mL 1 ppm = 1 ug/mL. ppm↔ug/dL 1 ppm = 100 ug/dL. ppm↔ug/L 1 ppm = 1000 ug/L. ppm↔ng/L 1 ppm = 1000000 ng/L.