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Linear, Logarithmic, Semi-Log Regression Calculator

Linear regression is a type of statistical modeling that attempts to describe the relationship between an independent and dependent variable through use of a linear function. There are many well established methods for determining this linear function. This particular calculator uses the least squares method in order to determine the best fit line.

This calculator will generate four separate linear regression equations and plots. They are as follows:

#NameTypeX AxisY Axis
1LinearLinearLinearLinear
2Log-LinearSemi-LogLogarithmicLinear
3Linear-LogSemi-LogLinearLogarithmic
4Log-LogLogLogarithmicLogarithmic

For technical assistance on using this calculator, please contact websupport@aatbio.com.

Data Entry
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Have a question or a feature request about this tool? Feel free to reach out to us and let us know! We're always looking for ways to improve!
References
This online resource may be cited as follows
MLA
"Quest Graph™ Linear, Logarithmic, Semi-Log Regression Calculator." AAT Bioquest, Inc., 22 Sep. 2025, https://www.aatbio.com/tools/linear-logarithmic-semi-log-regression-online-calculator.
APA
AAT Bioquest, Inc. (2025, September 22). Quest Graph™ Linear, Logarithmic, Semi-Log Regression Calculator. AAT Bioquest. https://www.aatbio.com/tools/linear-logarithmic-semi-log-regression-online-calculator.
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This online resource has been cited in 5 publications, including
Implementation of Flight Mechanical Evaluation Criteria in an Aircraft Conceptual Design Tool with Focus on Lateral Motion
Authors: 
Garc{\'\i}a Garre, Ricardo
Effect of maximum load on cyclic crack growth in UD E-glass/vinyl ester composites with constant and alternating stitch density
Authors: 
Anchondo, Rub{\'e}n I Erives and Goutianos, Stergios
Anticholinesterase and Antioxidant Activities of Spilanthes filicaulis Whole Plant Extracts for the Management of Alzheimer’s Disease
Authors: 
Elufioye, Taiwo O and Unachukwu, Cynthia C and Oyedeji, Adebola O
Journal: 
Current Enzyme Inhibition (2019): 103--113
Antioxidant and Anticholinesterase Activities of Macrosphyra Longistyla (DC) Hiern Relevant in the Management of Alzheimer's Disease
Authors: 
Elufioye, Taiwo O and Chinaka, Chidimma G and Oyedeji, Adebola O
Journal: 
Antioxidants (2019): 400
Correlation of Total Phenolic, Flavonoid and Tannin Content of Bryophyllum pinnatum (Lam.)(Crassulaceae) Extract with the Antioxidant and Anticholinesterase Activities
Authors: 
Elufioye, Taiwo O and Olusola, Damilare M and Oyedeji, Adebola O
Journal: 
Pharmacognosy Journal (2019)

  • Paste experimental data into the box on the right. Data can be copied directly from Excel columns. Data can also be comma-separated, tab-separated or space-separated values. If entering data manually, only enter one X-Value per line. Replicates can be graphed simultaneously. Graph will generate error bars based on the standard error of the mean (SEM). Simply paste or enter all data columns to begin. Format should be as follows:
    ConcentrationResponse 1Response 2…
    C1R11R21…
    C2R12R22…
    C3R13R23…
    …………
    Users can graph up to three data sets on the same graph for comparison purposes. To add a new data set, press the "+" tab above the data entry area. Data sets can be renamed by double clicking the tab. Each dataset will generate a corresponding Regression value as well as the equation for the best fit line.
  • Verify your data is accurate in the table that appears.
  • Press the "Calculate Regression" button to display results, including calculations and graph.