Fit a four-parameter logistic online and get the IC50 or EC50 with 95% CI, Hill slope and asymptotes. Downloadable PNG curve, no GraphPad install needed.
If you use it in your thesis or in a paper, cite it so that readers of your Methods section know how the calculation was done.
Ciudad-Fernández, V. (2026). Dose-response curve calculator [Web application]. Ciudad Science. Retrieved October 14, 2026, from https://analisisdedatospsicologia.com/en/tools/dose-response-curve-calculator
For your Methods section: The dose-response curve was fitted with a four-parameter logistic (Hill) model, from which the EC50 or IC50 was obtained, using the Ciudad Science dose-response curve calculator (Ciudad-Fernández, 2026).
@misc{ciudadfernandez2026dosisrespuesta,
author = {Ciudad-Fern{\'a}ndez, V{\'i}ctor},
title = {{Dose-response curve calculator}},
year = {2026},
publisher = {Ciudad Science},
howpublished = {Web application},
url = {https://analisisdedatospsicologia.com/en/tools/dose-response-curve-calculator},
urldate = {2026-10-14},
note = {Accessed 2026-10-14},
}