PUBLISHED TOOL DIRECTORY
Useful tools, ready when you are.
Every card opens a working workspace. Pick the job, use the tool, and move on.
LIVE DIRECTORY
Pick a tool. Get it done.
Chemical Dilution Calculator
Create a bounded, browser-local chemical dilution calculator with visible assumptions, review guidance, and downloadable output.
Chess Tournament Pairing Planner
Create a bounded, browser-local chess tournament pairing planner with visible assumptions, review guidance, and downloadable output.
Chi Square Goodness Of Fit Calculator
Calculate chi square goodness of fit with guided inputs, visible equations, substituted working, and model assumptions.
Chi-Square Calculator
Create a bounded, browser-local chi-square calculator with visible assumptions, review guidance, and downloadable output.
Child Growth Tracker
Create a bounded, browser-local child growth tracker with visible assumptions, review guidance, and downloadable output.
Child Tax Credit Calculator
Estimate a per-child credit from qualifying children and credit per child.
Childcare Cost Calculator
Create a bounded, browser-local childcare cost calculator with clear inputs, guided review, and a practical output.
Chinese Remainder Two-Congruence Calculator
Combine two coprime congruences and verify both residues.
Chord Length Calculator
Calculate chord length with guided inputs, visible equations, substituted working, and model assumptions.
Chore Chart Builder
Create a bounded, browser-local chore chart builder with clear inputs, guided review, and a practical output.
Chromatography Retention Factor Calculator
Calculate chromatography retention factor with guided inputs, visible equations, substituted working, and model assumptions.
Churn Calculator
Calculate opening-cohort customer churn, retention, ending customers, and net change.