Calculators
Small tools for clearer decisions.
Interactive calculators that run in your browser and keep your inputs local.
Available tools
Choose a calculator.
FIRE Calculator
Explore how savings rate, real investment return, and withdrawal-rate assumptions can change the estimated time to financial independence.
View tool AvailableWeight Loss Calculator
Estimate calorie targets, weight-loss pace, milestone dates, and weekly progress from simple body details.
View tool AvailableCompound Interest Calculator
Project how an initial investment and recurring contributions could grow over time with an expected annual return.
View toolTool principles
Useful first, polished second.
Each calculator should explain its assumptions, keep inputs understandable, and make the result easy to interpret. For the current phase, calculations should happen locally in the browser.