Calculator collections
Browse calculators by high-intent use case.
Financial Core Calculators
High-intent calculators for compounding, mortgages, DCA, ROI, and return planning.
General Utility Calculators
Percentage, tax, date, unit, and everyday utility calculators for fast decisions.
Advanced Finance Calculators
Advanced calculators for NPV, IRR, XIRR, YTM, duration, liquidation, and position sizing.
Financial Core Calculators
View allCompound Interest
Growth with recurring contributions and compounding frequency.
CAGR
Convert between annualized rate and final amount.
Mortgage Payment
Monthly payment and amortization overview.
Loan Compare
Compare annuity and equal principal repayment.
DCA
Periodic investing with expected annual return.
ROI + Annualized
Calculate total ROI and annualized return.
Break-even
Break-even quantity and revenue.
Inflation-adjusted Return
Nominal return vs purchasing-power return.
Fee Drag
Impact of ongoing fees on final value.
After-tax Return
Flat tax model for after-tax projection.
FX Converter
Manual rate-based currency conversion.
Savings Goal
Required periodic contribution to hit target value.
General Utility Calculators
View allStandard Calculator
Safe arithmetic expression calculator.
Percentage Change
Change percentage or derive value from percentage.
Discount / Markup
Apply discount or markup to base price.
VAT / GST
Add or remove indirect tax from amount.
Date Interval
Count days and weeks between two dates.
Business Day Count
Count weekdays between two dates.
Unit Converter
Length / Weight / Temperature conversion.
Tip & Split
Calculate tip, total bill, and per-person share.
Advanced Finance Calculators
View allNPV
Discounted cashflow valuation.
IRR
IRR solved via Newton + bisection fallback.
XIRR
IRR with irregular dated cashflows.
Payback Period
Time to recover initial outlay from cashflows.
Bond YTM
Yield to maturity for fixed coupon bond.
Duration & Convexity
Bond sensitivity metrics under yield assumptions.
Margin Liquidation
Estimate liquidation price under leverage.
Position Sizing + Kelly
Risk-based position size and Kelly fraction.