Calculator collection · 11 distinct tools
Money & Business Calculators
Model debt payoff, debt-to-income ratios, investment fee drag, discounted cash flows, IRR and sales commission with assumptions and working exposed.
Money and business pages expose cash-flow timing, rates, fees and scenario assumptions. They are calculation workspaces, not approval decisions, return forecasts or individualized financial recommendations.
Open a real interactive tool instead of landing on a thin keyword page.
Formulas, units and assumptions stay visible beside the result.
Move between genuinely different calculations inside one collection.
Supplier, manufacturer, drawing and standards data remain authoritative where required.
Choose the calculation that matches the job
Each page owns a distinct input/output task. Reciprocal forms stay together when the underlying job is the same.
Calculator
Credit Card Payoff Calculator — Payment, Months & Interest
Model a credit-card payoff from balance and APR, solve either the payoff time from a fixed payment or the payment required for a target month, and include recurring spending and annual fees.
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Debt-to-Income Ratio Calculator — Front-End, Back-End & Scenario DTI
Calculate housing and total debt-to-income ratios from itemized monthly obligations, then add a proposed new payment to see the scenario DTI without applying a one-size-fits-all approval threshold.
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Investment Fee Calculator — Fee Drag vs No-Fee Growth
Compare a contribution-based investment projection with and without sales load, annual asset fees and an ending redemption fee, with the fee assumptions and return model kept editable.
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NPV Calculator — Net Present Value of Irregular Cash Flows
Calculate net present value for a time-zero cash flow and an irregular series of later cash flows, with a per-period present-value table that exposes every discounted term.
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IRR Calculator — Internal Rate of Return from Cash Flows
Estimate internal rate of return from a time-zero amount and irregular per-period cash flows, show NPV at an optional hurdle rate, and warn when the cash-flow pattern can produce multiple IRRs.
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Commission Calculator — Simple, Tiered & Base Pay
Calculate a simple percentage commission or a progressive three-tier commission from revenue or gross profit, then include optional base pay and see the effective commission rate.
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Loan Payoff Calculator — Extra Payments, Lump Sum & Amortization
Compare a scheduled loan with recurring extra principal and a timed lump-sum payment. See the full amortization schedule, payoff time, interest saved and time saved without creating separate thin mortgage or auto-loan copies.
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Unit Price Calculator — Compare Price per Unit
Normalize mixed package sizes and units, rank shopping options by unit price and see the savings or premium versus the lowest-cost option.
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Rule of 72 Calculator — Doubling Time & Exact Comparison
Estimate doubling time with the Rule of 72, compare it with the exact logarithmic result and reverse-solve the rate for a target doubling time.
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Pay Raise Calculator — New Pay, Raise % & Real Change
Calculate new pay from a raise percentage or recover the raise percentage from old and new pay, with optional inflation context for purchasing-power comparison.
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Savings Withdrawal Calculator — Drawdown Duration & Ending Balance
Model level withdrawals from a savings balance under an entered constant return assumption to estimate duration, ending balance and drawdown behavior.
Open calculatorUseful next calculations
Move to a different formula only when the next question actually changes.
Compound Interest Calculator
Model compounding, contributions and APY before moving into fee or cash-flow analysis.
Loan Payoff Calculator
Compare scheduled repayment with extra-principal strategies.
Unit Price Calculator
Normalize package sizes and compare price per unit.
Pay Raise Calculator
Move between old pay, new pay and percentage change.
Explore adjacent calculator collections
Cross-cluster links help you move from measurement to project quantity, electrical relationships, money, statistics or media planning without flattening everything into one giant list.
Measurement Calculators →
Work with tape-measure dimensions, drawing scales, area and unit conversions.
Construction & DIY Calculators →
Estimate area, concrete and tile quantities with visible assumptions and formulas.
Electrical & Engineering Calculators →
Solve foundational voltage, current, resistance and power relationships without hiding the formulas.
Statistics Calculators →
Paste datasets or enter study assumptions to calculate descriptive statistics, spread, correlation, regression, sample size, margin of error and exact combinatorics with formulas and working kept visible.
Fraction Calculators →
Work with fractions, decimals, mixed numbers and practical inch fractions with the simplifying steps kept visible.
Geometry Calculators →
Solve common 2D area, right triangles, general triangles, circles, rectangles, perimeter, volume and slope from explicit dimensions and formulas.
Screen, Image & Video Calculators →
Plan pixel density, physical screen dimensions, aspect ratios, video bitrate and file size before resizing, converting or compressing media.
Everyday Planning Calculators →
Solve practical planning, weather, science and engineering jobs with editable assumptions and visible working.
Formula first, assumptions visible
MAXScanner keeps editable rates, units and dimensions next to the result, shows the working where it helps, and avoids turning reciprocal formulas into duplicate pages. Product documents, financial terms, study design, drawings and applicable standards remain authoritative where required.