Tools
Free calculators for the questions managers, boards and funders ask before they commit money. Everything runs in your browser and nothing you enter is sent anywhere.
ROI and payback calculator
Net present value, return per dollar and payback year for a program, project, hire or campaign, adjusted for benefits that would have happened anyway.
A/B test sample size and duration calculator
Visitors per variant, weeks to run, the smallest lift you can detect, and what that lift is worth per week.
Price change calculator
How many sales a price rise can lose, or a discount must win, before profit falls.
The Evidence-Gated AI Checklist
Eight tests and a self-score for whether AI-produced analysis can be trusted: baselines, independent checks, calculated numbers, causal claims, provenance and more.
Research break-even calculator
The yield gain per acre that pays back a year of crop research spending, with options for lags, adoption and discounting.