A measure you can defend.
Method, source, assumptions, and defaults sit with the result. No mystery math.
THE FINANCIAL CALCULATOR SUITE FOR OPERATORS
CFO-grade calculations.
Without the CFO.
Twenty-eight calculators for operators, founders, and real-estate investors. Each output names the method, shows the assumptions, and calls out the defaults behind the number.
Mittafin is pronounced MIT-ta-fin. It starts with Finnish mitta, meaning measure, then anchors it in finance.
Open the calculators →
Download on theApp Store
Get it onGoogle Play
Coming soon · Informational use only · Not financial, tax, investment, or legal advice.
You need a number for a real decision: a lease, acquisition, hire, or deal. You have Excel, ChatGPT, and maybe an accountant who bills by the hour. Mittafin gives you the calculation and the assumptions behind it, fast enough to use before the meeting ends.
There's a better way to defend a number.
WHAT MITTAFIN GIVES YOU
The number, then the receipts.
Desk and pocket.
Browser or native mobile. Same engine, same numbers, same methodology.
For your AI agent.
Coming next. Agent access to the calculator engine, with methodology returned beside the answer.
METHODOLOGY
Every number, with the math.
Formula, data source, assumptions, defaults. Not a footnote, the thing that makes the output usable.
This is what makes a number defensible: to your partner, your banker, your board.
V0 = Σt=1n FCFt(1 + r)t + FCFn(1 + g)(r − g)(1 + r)n
data_source
Damodaran Jan 2026 industry WACC, betas, country risk, synthetic ratings.
assumptions
Forecast horizon, terminal growth, tax rate, reinvestment, share count.
defaults
Every default is named before it touches the answer.
disclaimer
Informational use only.
PRO · COMING SOON
DCF Model
Discounted cash-flow valuation with assumptions and methodology visible.
EXPERT · COMING SOON
Sensitivity Analysis
Stress the assumptions before someone else does.
FREE
Interest & Amortization
Payment schedules with the amortization method and inputs made clear.
PRO · COMING SOON
WACC Estimator
Cost of capital with Damodaran reference data already labeled.
FREE
ROI
A fast return check for hires, leases, campaigns, and equipment.
EXPERT · COMING SOON
IRR
Cash-flow timing and return math without rebuilding the sheet.
FREE
Rental ROI
Rent, expenses, financing, and cash yield in one operator-readable view.
View all calculators
28 total
WHEREVER YOU WORK
Web first. Mobile next.
The same calculator engine is planned for browser and native mobile. The landing page should promise the direction, not pretend the account layer is already live.
WEB APP · COMING SOON
Web
The first surface for the full calculator library and methodology panels.
IOS + ANDROID · COMING SOON
Mobile
Native apps are planned for the same calculations when the product opens.
AI agent access
Calculator calls with methodology returned beside the answer.
Accounts
Login, My Models, shared URLs, and account sync belong in the Next.js app.
Export
PDF for the board pack. Excel when you want to keep modeling.
PRICING
Pricing is coming soon.
The tiers describe product depth, not current prices. We will publish pricing when accounts and paid plans are ready.
Free
launch tierComing soonCore operator calculators for fast checks and defensible day-to-day numbers.
Free
launch tierInterest & AmortizationROIRental ROIDiscount FactorMarginal CostWorking Capital
View calculators →Pro
deeper modelingComing soonValuation, capital structure, statements, and operating finance.
Pro
deeper modelingDCFWACCBalance SheetCash FlowCapExPP&E ScheduleCOGMR&D CapitalizationEBITDA MultipleEV vs EquityMarket-to-BookLeverage RatiosMarket Value of DebtFinance FunctionsCAPM
View calculators →Expert
advanced casesComing soonHeavier modeling for acquisition, leverage, attribution, and sensitivity work.
Expert
advanced casesIRRDeleveragingLBO Returns AttributionMoM / MOICEV to Equity BridgeBeta ConversionSensitivity Analysis
View calculators →HONEST ANSWERS
A few honest answers.
Is this just another free calculator site?
No. The product is the calculation plus its receipt: method, data source, assumptions, defaults, and a result you can explain.
I already have Excel templates. Why switch?
Don't switch. Use Mittafin for the 30-second calculations between meetings, then keep Excel for deeper modeling.
Why show tiers without prices?
The tiers explain depth. Pricing comes when accounts and paid plans are ready. Until then, we are not pretending checkout exists.
Is this financial advice?
No. Informational purposes only. Not financial, tax, investment, or legal advice. The math is rigorous. The judgment is yours.
The calculations you need.
The math that holds them up.
The web app, native mobile apps, accounts, and export workflows are coming soon. The calculator library is the promise: fast output, visible math, no mystery defaults.