Investment calculators
Every calculator runs in your browser, shows its assumptions, and lets you share a link to your exact scenario. No signup, no data collection.
Compound Interest
How a balance grows with compounding, plus doubling time and effective annual yield.
Open →Investment Growth
Project regular contributions over time with realistic return presets and an inflation adjusted result.
Open →Retirement
Will your savings last? Model saving, spending, inflation, and longevity in one view.
Open →Mortgage
Payment, lifetime interest, amortization schedule, and the effect of extra payments.
Open →Fee Impact
Fund fees look tiny and cost a fortune. Compare two expense ratios side by side.
Open →Inflation
What purchasing power really looks like over decades, in both directions.
Open →How these calculators work
All math runs locally in your browser using standard financial formulas: compound growth, annuity contributions, and amortization. Annual rates are converted to per period rates geometrically, so results stay consistent across contribution frequencies. Projections are illustrations, not predictions. Markets do not deliver smooth average returns, and real world results will vary. For baseline assumptions, see what markets return on average.