General laboratory math tool.
Laboratory math
Lab Dilution & Concentration Calculator
Solve C1V1 = C2V2 for any one value, work out mass concentration and molarity, and convert between mass, volume and molar concentration. Everything is calculated in your browser; nothing is sent or stored.
C1V1 = C2V2 solver
Pick the value to solve for, then fill in the other three. C1 and C2 must both be molar (M, mM, µM) or both be mass per volume (mg/mL, µg/mL).
Result
Diluent to add (V2 − V1)
Dilution factor (C1 / C2)
Mass concentration
Mass of solute divided by total solution volume.
Concentration
mg/mL
µg/mL
Molarity from mass
Moles = mass ÷ molecular weight; molarity = moles ÷ volume in litres.
Molarity
mM
µM
Converter
Convert within one family: mass (g, mg, µg, mcg), volume (L, mL, µL) or molar concentration (M, mM, µM). mcg and µg are the same thing.
Converted value
Questions
Can C1 and C2 be in different scales?
Yes, within one family. 1 M and 50 mM are both molar and are converted for you. A molar value and a mg/mL value cannot be compared without a molecular weight; use the Molarity tab first.
Why does the solver warn when C2 is higher than C1?
A dilution can only lower concentration. If the final concentration is above the stock concentration, V1 would be larger than V2, which is not possible.
Are mcg and µg the same?
Yes. Both mean microgram, one millionth of a gram.
Is any data sent anywhere?
No. The math runs in your browser and nothing you type is sent or saved.
For research use only. Not for human or veterinary use. Not a drug, food, or cosmetic. General laboratory math tool.