Abstract: The present invention is related to an improved method for the quantification of nucleic acid, which can be performed with a minimal amount of nucleic acid amplification reactions. The method according to the invention for the quantification of analyte nucleic acid in a sample comprises the steps of: adding to the sample different respective amounts of different nucleic acid constructs, each construct being distinguishable from the analyte nucleic acid and capable of being co-amplified with the analyte nucleic acid; subjecting the sample to a nucleic acid amplification procedure, using amplification reagents capable of reacting with both the analyte nucleic acid and the nucleic acid constructs; detecting the relative amounts of amplificates derived from analyte nucleic acid and each nucleic acid construct; calculating the amount of analyte nucleic acid from said relative amounts.