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.
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.
Churn Prevention Checklist
Create a bounded, browser-local churn prevention checklist with clear inputs, guided review, and a practical output.
Circle Area Calculator
Calculate circle area with guided inputs, visible equations, substituted working, and model assumptions.
Circle Calculator
Calculate circle area, circumference, and diameter from radius.
Circle Circumference Calculator
Calculate circle circumference with guided inputs, visible equations, substituted working, and model assumptions.
Circle Equation Calculator
Calculate circle equation with guided inputs, visible equations, substituted working, and model assumptions.