Calculators that show you the formula.
Get the answer for your own numbers, then copy the Excel formula that gives it, so next time you can work it out yourself.
Calculators
PMTIPMTLoan payment calculatorPayment, total interest and a full schedule, with the PMT formula for your numbers.How it works: PMT explained
NPVIRRNPV and IRR calculatorNPV and IRR for your cash flows, the Excel formulas, and the year-0 mistake explained.How it works: NPV explained
Reading is step one. Writing the formula is the skill.
Practise in a live grid that grades what your formula calculates, with a specific hint when it's wrong.
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