Build forward
What could regular saving become?
Project a starting balance and recurring contributions over time.
Start with compound interestTransparent financial calculators
Choose the calculation that matches the question.
Choose by the decision you need to make—from investment returns and portfolio rules to AI costs, cloud compute, cloud transfer, creator revenue and financial-independence targets. Each page keeps its formula, pricing scope and limitations visible before you use the answer.
All calculators
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Search by goal or narrow the catalog by category. Every calculator opens on its own focused page.
14 calculators match the current filters.
- Growth & portfolioGrowth planningCompound Interest CalculatorModel compound growth, monthly contributions, fee drag, annual step-ups, and purchasing power in any currency.Open calculator
- Returns & purchasing powerAnnualized returnCAGR CalculatorAnnualize start-to-end growth without confusing CAGR with an arithmetic average.Open calculator
- Returns & purchasing powerMoney-weighted returnXIRR Calculator for Irregular Cash FlowsMeasure annualized return when cash flows occur on irregular dates.Open calculator
- Returns & purchasing powerReal valueInflation & Purchasing Power CalculatorTranslate an inflation assumption into future cost and purchasing-power estimates.Open calculator
- Goals & cash-flow valueCash-flow valuationPresent Value of Annuity CalculatorValue a stream of end-of-period payments today using a chosen discount rate.Open calculator
- Growth & portfolioDeployment timingDCA vs Lump Sum CalculatorCompare immediate investment with a fixed twelve-month phased deployment.Open calculator
- Growth & portfolioInvestment costsInvestment Fee & Expense Ratio CalculatorCompare long-run wealth with and without recurring investment fees.Open calculator
- Growth & portfolioAllocation controlPortfolio Rebalancing CalculatorTurn current values and target weights into a validated three-sleeve rebalance plan.Open calculator
- Technology & creator economicsAI unit economicsLLM API Cost CalculatorCompare monthly text-token costs across current AI models using one auditable workload.Open calculator
- Technology & creator economicsCloud FinOpsCloud Product Cost ComparisonChoose a cloud product lane, enter one workload, and re-rank comparable provider offers instantly.Open calculator
- Technology & creator economicsInfrastructure economicsCloud Egress Cost CalculatorCompare measured origin egress under explicit route, free-allowance, unit, and pricing-tier assumptions.Open calculator
- Technology & creator economicsCreator revenueYouTube RPM Revenue CalculatorModel creator revenue from user-entered RPM scenarios—without inventing a universal niche or country rate.Open calculator
- Technology & creator economicsSubscription economicsCreator Platform Fee CalculatorSee how percentage fees, per-payment charges, and fixed plans affect paid-subscription revenue.Open calculator
- Goals & cash-flow valueReverse goal planningFIRE Goal CalculatorReverse-solve a financial-independence target instead of assuming the current savings path is enough.Open calculator
Not sure where to begin?
Start with the question, not the formula name.
Pick the closest starting point below. These are shortcuts, not another complete directory—the searchable catalog above remains the fastest way to reach every calculator.
Measure results
What return did an investment actually earn?
Use dated cash flows when deposits or withdrawals happened along the way.
Start with XIRRCompare operating costs
Which technology choice costs less at scale?
Choose a product lane, then match one workload against normalized provider prices.
Compare cloud productsEstimate digital income
What might an audience or membership earn?
Turn views, RPM, subscribers and platform fees into a useful revenue range.
Start with creator revenueWork backward
What would it take to reach a fixed target?
Solve for the contribution or return needed instead of assuming the answer.
Start with a FIRE goalHow to use an estimate responsibly
Reproduce it
Keep the inputs and formula basis. A result you cannot reproduce later is difficult to audit or compare.
Stress it
Change one assumption at a time and retain a cautious case. Long horizons magnify small rate differences.
Interpret it
Read the guide and limitations before acting. A precise output can still answer the wrong question.
Local market edition
Need LK rates, tax, funds or CSE tools?
Use the LK edition for local rules and current market datasets. Those pages remain separate because changing a currency label cannot localize a financial rule.