Tools
Free tools from the Lerner Lab: GuPPy, our open-source software for analyzing fiber photometry data, calculators for planning animal experiments, and the code and protocols we use and recommend. The calculators run entirely in your browser; nothing you enter is stored or sent anywhere.
01
GuPPy
Open-source Python software for analyzing fiber photometry data from a wide variety of acquisition systems, with a paper, wiki, video tutorial and chat room.
Get GuPPy →
02
Mouse Breeding Planner
Genotype ratios for multi-allele crosses (Cre, flox, reporters, X-linked), how many litters and breeding cages you need, when your mice will be ready, and faster alternative crosses.
Open the planner →
03
Sample Size Calculator
Power analysis for common animal study designs, with a justification paragraph ready to paste into your animal use protocol. t-test and ANOVA results match the R package pwr.
Open the calculator →
04
Other Code
Code and software we use and recommend, including older fiber photometry analysis code for MATLAB and an introduction to Git and GitHub.
See the code →
05
Protocols
Lab protocols and methods resources, including the Lerner Lab Protocols.io workspace and brain slice methods for older animals.
See the protocols →
Join the Lerner Lab
Centre for Addiction and Mental Health, Toronto, Ontario
UNIVERSITY OF TORONTO
© 2026 Lerner Lab, Centre for Addiction and Mental Health. All rights reserved.