Calculators
Investment calculators
A clean suite of personal-finance and valuation calculators. Plug in your numbers, see the output, copy the formula. No accounts, no email gates.
Compound interest
Future value of a lump sum at a constant rate.
Dollar-cost averaging
Project monthly contributions over decades.
Retirement
Target nest-egg + safe withdrawal projection.
Financial independence
When 25× expenses ≤ portfolio.
Dividend reinvestment
DRIP compounding effect.
Discounted cash flow
2-stage FCF model with terminal value.
Reverse DCF
Implied growth rate at the current price.
Graham number
Benjamin Graham's defensive-investor fair value.
Owner earnings
Buffett's alternative to reported EPS.
PEG ratio
P/E adjusted for earnings growth.
Earnings yield
Inverse P/E vs bond yield comparison.
Magic Formula score
Greenblatt earnings yield × ROC composite.
Margin of safety
Buy price = fair value × (1 − MoS).
Required return
CAGR you need to hit a goal in N years.
Lump sum
Single deposit, no contributions.
Monthly contribution
Solve for the monthly savings to hit a goal.
Each calculator output is illustrative only — it assumes constant inputs and ignores taxes, fees, inflation, and market volatility unless stated. For research and educational purposes, not financial advice.