"was calculated against" is correct and usable in written English.
You can use it when referring to an amount or quantity that was measured or compared to a standard. Example: The success rate of the program was calculated against the objectives outlined in the proposal.
Countries' over- and underperformance was calculated against a group of 15 countries most similar in terms of GDP per capita, using a four-year average.
Potency of all the extracts was calculated against different organisms.
Fold change mRNA expression was calculated against VN-mean at each time point.
Fold change was calculated against VN-mean at each time point.
The extravasated EBD concentration in lung homogenate was calculated against a standard curve.
The relative effect of Eucalyptus on runoff was calculated against that of cultivated land by considering cultivated land as 100%.
The CO2 effect of energy substitution was calculated against reference fossil fuel emission scenarios by life cycle analysis.
The minimum inhibitory concentration (MIC) of copper nanoparticles (CuNPs) and zinc oxide nanoparticles (ZnONPs) at the range from 2 to 128 µg/ml was calculated against Gram-positive and Gram-negative pathogenic bacteria using a broth dilution method.
The dose-dependence of the superoxide anion scavenging effect of extracts, fractions and caffeic acid (reference substance) was calculated against different concentrations (1, 2, 3, 4, 5, 10, 25, 50 µg/ml).
After one iteration of LO-refinement, the density of the target module was segmented using a soft mask in the shape of the module, and the FSC curve was calculated against the density map from PDB file for comparison and further analysis (Scheres and Chen, 2012).
After one iteration of LO-refinement, the density of the target module was segmented using a soft mask in the shape of the module, and the FSC curve was calculated against the density map generated from PDB file for comparison and further analysis (Scheres and Chen, 2012).
