How We Calculate
How We Calculate
Every calculator on MyAllies uses industry-standard formulas and transparent methodology. Here is how our tools work under the hood.
Our Commitment to Accuracy
MyAllies provides over 200 free financial calculators covering stocks, options, bonds, retirement, real estate, and personal finance. Every tool is built on well-established financial models, textbook formulas, and real-world assumptions.
We believe in transparency. Each calculator page includes an explanation of the formula used and the assumptions made so you can verify the math yourself.
METHODOLOGIES
Explore by Category
Options Pricing
Black-Scholes, binomial models, Greeks calculations, and implied volatility methods used in our options tools.
Learn more →Valuation Models
DCF analysis, dividend discount models, earnings multiples, and comparable company analysis frameworks.
Learn more →Time Value of Money
Compound interest, present value, future value, annuity calculations, and amortization schedules.
View Calculators →Risk Management
Value at Risk (VaR), Sharpe ratio, Sortino ratio, maximum drawdown, and portfolio risk models.
View Calculators →Real Estate & Mortgage
Amortization formulas, LTV ratios, cap rate calculations, and rental yield analysis methods.
View Calculators →Retirement Planning
FIRE calculations, safe withdrawal rates, Social Security estimates, and inflation-adjusted projections.
View Calculators →Assumptions and Limitations
All calculators are educational tools and should not be used as the sole basis for investment decisions. Key assumptions include:
- check_circle Past performance is not indicative of future results
- check_circle Tax implications vary by jurisdiction and are not factored into most calculators
- check_circle Market conditions, fees, and slippage may affect actual results
- check_circle Options pricing models assume log-normal distribution of returns
- check_circle Interest rate calculations use standard compounding assumptions
For professional financial advice, consult a qualified financial advisor.