P-Value Calculator

Exact p-value for Z, T, Chi-square or F tests with α=0.05/0.01 verdicts.

Z-Score Calculator

Z-score, percentile and tail probability — or reverse from z to raw value.

Should I Quit My Job? Runway Calculator

Runway months after cushion — GO / TIGHT / DON'T QUIT YET with next actions.

Back-to-School ROI Calculator

Tuition + lost wages vs salary uplift; payback and ROI vs index-fund benchmark.

Career-Switch Bootcamp ROI Calculator

Bootcamp ROI with landing-rate risk — expected and conditional returns.

PhD vs Work-and-Invest Calculator

Year-by-year wealth: PhD stipend path vs work-and-invest compounding.

Sabbatical Impact Calculator

Cash cost plus lifetime opportunity cost of a mid-career sabbatical.

Divorce True Cost Calculator

Lawyer, asset split, alimony NPV and 10-year stay vs divorce counterfactual.

Should I Have a Kid? Calculator

Raising-a-child cost + leave loss + retirement impact by region and childcare.

IVF Decision Cost Calculator

Expected IVF cost and success probability by age and planned cycles.

Adult Boomerang Kid Cost

Direct cost, bedroom opportunity cost and retirement compound impact.

Sandwich Generation Burden

Cash-flow, retirement sacrifice and burnout risk caring for kids + parents.