Calculators tools
150 focused tools, ready to use in your browser.
Percentage Calculator
Calculate a percentage of any amount, then see the totals after adding or subtracting that percentage.
CalculatorsDiscount Calculator
Find a discounted price, savings, and an optional tax estimate applied after the discount.
CalculatorsProfit Margin Calculator
Calculate gross profit and gross margin from revenue and cost, including loss-making sales.
CalculatorsMarkup Calculator
Turn a cost and a markup rate into a selling price, profit amount, and equivalent gross margin.
CalculatorsAge Calculator
Find completed years, total calendar days lived, and the next birthday from two dates.
CalculatorsDate Difference Calculator
Count signed calendar days between two dates and break the absolute interval into weeks and days.
CalculatorsTime Difference Calculator
Calculate a clock-time difference for the same day or the next day, including seconds and decimal hours.
CalculatorsUnit Converter
Convert length, mass, temperature, and digital data units with explicit decimal and binary data sizes.
CalculatorsBreak-even Calculator
Estimate the whole units needed to cover fixed costs using a selling price and variable cost per unit.
CalculatorsROI Calculator
Calculate net gain and non-annualized return on investment from cost and total proceeds.
CalculatorsSimple Interest Calculator
Estimate interest earned or owed without compounding over a chosen number of years.
CalculatorsCompound Interest Calculator
Project a lump sum using a fixed nominal annual rate and selected compounding frequency.
CalculatorsLoan Amortization Calculator
Estimate a fixed monthly loan payment and download a complete principal-and-interest schedule.
CalculatorsSavings Goal Calculator
Estimate the monthly deposit required to reach a target balance by a fixed month count.
CalculatorsAnnualized Return Calculator
Calculate compound annual growth rate from a starting value, ending value, and elapsed years.
CalculatorsInflation Adjustment Calculator
Model future cost and unchanged-money purchasing power using your own constant inflation rate.
CalculatorsSales Tax and VAT Calculator
Add a user-entered tax rate to a net price or extract included tax from a gross price.
CalculatorsTip and Bill Split Calculator
Calculate a gratuity and split the combined bill evenly across a whole-number party size.
CalculatorsSalary to Hourly Calculator
Translate gross annual salary into hourly, monthly, and paid-working-week equivalents.
CalculatorsEffective Annual Rate Calculator
Convert a nominal annual rate into an effective annual rate for a selected compounding frequency.
CalculatorsDebt Payoff Calculator
Estimate how many monthly payments a fixed balance needs at a supplied nominal interest rate.
CalculatorsNet Present Value Calculator
Discount a cash-flow list with its initial amount at period zero and show the periodic valuation.
CalculatorsInternal Rate of Return Calculator
Find a bounded periodic IRR for an initial outlay followed by nonnegative receipts.
CalculatorsPayback Period Calculator
Find when cumulative nonnegative receipts recover an initial outlay, without assuming annual periods.
CalculatorsBook Depreciation Schedule Calculator
Create a straight-line or double-declining book depreciation schedule with an explicit salvage floor.
CalculatorsInventory Turnover Calculator
Measure period inventory turnover and days from COGS and opening/closing balances.
CalculatorsCash Conversion Cycle Calculator
Combine inventory, receivable, and payable holding periods using matched financial inputs.
CalculatorsLiquidity and Working Capital Calculator
Calculate current ratio, quick ratio, and working capital in one balance-sheet snapshot.
CalculatorsCash Runway Scenario Calculator
Estimate time to a protected cash reserve under constant monthly cash inflows and outflows.
CalculatorsSubscription Unit Economics Calculator
Compare acquisition cost, modeled gross-profit lifetime value, and contribution payback.
CalculatorsEconomic Order Quantity Calculator
Estimate a classic order batch and compare adjacent whole-unit cost candidates.
CalculatorsReorder Point and Safety Stock Calculator
Model a stock trigger from independent daily demand, fixed lead time, and a supplied service z-score.
CalculatorsFixed-coupon Bond Valuation Calculator
Discount an ideal fixed-coupon bond and report its cash-flow-weighted duration.
CalculatorsLease Versus Buy Cost Scenario Calculator
Compare explicit ownership and lease cost streams over a common horizon.
CalculatorsRecipe Serving Scaler
Scale every named ingredient to one or several serving counts, keeping original units and exact fraction results.
CalculatorsBaker’s Percentage Workbench
Calculate whole-formula baker percentages, explicit water hydration and scaled dough masses across final-mix and preferment components.
CalculatorsScreen Pixel Density Calculator
Calculate native display PPI, pixel pitch and active width/height from resolution and a measured diagonal; optionally compare two panels.
CalculatorsDuPont ROE Calculator
Decompose a user-supplied return on equity into profit margin, asset turnover and equity multiplier.
CalculatorsPortfolio Allocation Delta Calculator
Reconcile current holding values with user-chosen target weights and a cash contribution or withdrawal.
CalculatorsPayment Fee Calculator
Calculate net proceeds or the smallest minor-unit gross amount under one entered percentage-plus-fixed fee rule.
CalculatorsTiered Commission Calculator
Compare marginal and retroactive commission rules with an explicit per-tier breakdown.
CalculatorsInvoice Early-payment Terms Calculator
Compare an entered invoice discount with its simple annualized financing equivalent over the extra payment days.
CalculatorsOvertime Pay Scenario Calculator
Estimate gross pay from entered hours, a regular-hour threshold and a user-defined premium multiplier.
CalculatorsClosed Funnel Conversion Calculator
Calculate stage conversion, drop-off and overall completion from one matched closed-funnel population.
CalculatorsCohort Retention Calculator
Calculate an age-aligned retention matrix while keeping unobserved cohort periods separate from actual zeros.
CalculatorsRecurring Revenue Bridge Calculator
Reconcile user-entered recurring-revenue movements and explicitly defined opening-cohort retention fractions.
CalculatorsDated Cash-flow Balance Planner
Build a calendar-day closing-balance schedule from supplied signed cash movements and an opening balance.
CalculatorsCash Denomination Planner
Find a minimum-item allocation of exact minor units using allowed denominations and optional stock limits.