# HP 12C-style RPN calculator for CFA practice Use a free HP 12C-style calculator and tutorial for CFA practice: RPN arithmetic, TVM, mortgage payments, NPV, and IRR. Independent browser tool. Canonical URL: https://exclam.ai/cfa/hp12c-calculator/ [CFA](https://exclam.ai/cfa/index.md)/HP 12C-style calculator Free financial calculator Use the calculator immediately for RPN arithmetic, mortgage payments, present value, future value, NPV, and IRR. CFA Institute allows the HP 12C family on exam day, so this is filed under the CFA section as a practice tool rather than a generic tools page. [Start tutorial](https://exclam.ai/cfa/hp12c-calculator/index.md#tutorial) Mortgage payment and affordability checks CFA-style TVM practice Bond and valuation desk math NPV and IRR sanity checks ## Fast TVM example To calculate the monthly payment on a $300,000 loan over 30 years at 6% annual interest, use monthly periods: **360 n**, **0.5 i**, **300000 PV**,**0 FV**, then press **PMT**. The payment appears as a negative cash flow. Load beside calculator ## How to use this HP 12C-style calculator Click any tutorial step to load its keystrokes beside the calculator. Use the browser version to learn RPN entry, TVM register storage, payment solving, and cash-flow checks. ### 1. Start with RPN arithmetic RPN entry puts numbers on the stack first and applies the operator second. To add 12 and 3, enter the first number, press ENTER, enter the second number, then press plus. 12ENTER3+ Result: 15 ### 2. Store TVM values For time value of money problems, type a value and then press the register key. Interest is entered per period, so a 6% annual mortgage with monthly payments uses 0.5 for i. 360n0.5i300000PV0FV Result: Registers set ### 3. Solve the missing register After four TVM values are stored, press the missing register without typing a new number. With the sample mortgage values, PMT returns the monthly payment as an outgoing cash flow. PMT Result: -1798.65 ### 4. Check NPV and IRR Use the cash-flow helper for uneven investment problems. Put CF0 on the first line, one later cash flow per line, then set the discount rate for NPV and compare against IRR. -10003004204608% Result: NPV 3.02; IRR 8.16% ### CFA practice checklist Learn the RPN stack before you are solving timed questions. Use opposite signs for money received and money paid. Convert annual rates to the period used by n. Reset or overwrite stale TVM registers between problems. The DATE and SL/SOYD/DB depreciation keys are simplified learning helpers, not exact HP 12C keystrokes. Practice the same workflow on your approved physical calculator before exam day. hp 12c financial calculatorNo CF 0.00000 T0.0000 Z0.0000 Y0.0000 X0.0000 AMORTn12xINTi12÷NPVPVCF0RNDPMTCFjIRRFVNjRPNCHSDATE 7BEG 8END 9MEM ÷Undo PRICEy^xx√yYTM1/xe^xSL%TLNSOYDΔ%FRACDB%INTG EEXDAYS 4D.MY 5M.DY 6x̄w ×x² P/RR/SPSEΣSSTBSTPRGMR↓GTOCLEAR FINx↔yx≤yREGCLxx=0PREFIXENTER 1x,r 2y,r 3n! -Back OFFON f g STO( RCL) 0x .S Σ+Σ- +LSTx Ready · FIX 5 · END Calculator starts blank Every register and the stack start at 0 — nothing is pre-filled. Use Load example to populate the worked $300,000 loan TVM values, or just start typing. Load example Loaded example ## Monthly loan payment Fast TVM Calculate the monthly payment on a $300,000 loan over 30 years at 6% annual interest. Use monthly periods and enter the annual rate as 0.5% per month. 360 n0.5 i300000 PV0 FVPMT Result: -1798.65 The payment appears negative because it is an outgoing cash flow. Fast TVMMonthly loan paymentTutorialStart with RPN arithmeticTutorialStore TVM valuesTutorialSolve the missing registerTutorialCheck NPV and IRR Helper — not physical calculator keystrokes The g DATE date helper and the SL, SOYD, and DB depreciation helpers are simplified learning aids: they return the CFA answer but do not reproduce the exact HP 12C keystroke sequence. RPN entry, the TVM registers, NPV, and IRR match the hardware keystrokes. TVM registers n 0.000000 i 0.000000 pv 0.000000 pmt 0.000000 fv 0.000000 mode END Type a value and press a TVM key to store it. Press a TVM key again without typing to solve that value. Interest is per period, so 6% APR with monthly payments is entered as 0.5. Cash-flow helper Cash flows, one per lineDiscount rate NPV 3.02 IRR 8.16% ## Interactive finance visuals The charts update from the TVM registers and cash-flow helper, so users can see the loan balance path, payment mix, project cash-flow timing, and cumulative discounted value without leaving the calculator. Figure: TVM balance path Remaining balance Hover or focus a point to inspect the curve. Figure: First payments interest and principal Hover or focus a bar to inspect the value. Figure: Cash-flow timeline Hover or focus a bar to inspect the value. Figure: Cumulative discounted cash-flow value Cumulative discounted value Hover or focus a point to inspect the curve. ## Built for search intent People searching for an HP12C emulator usually want a calculator now, not a landing page. The usable tool is above the fold. ## Useful beyond one query RPN arithmetic, TVM, NPV, and IRR make it useful for CFA prep, analyst work, real estate, and business-school finance. ## Natural exclam.ai bridge Finance students can calculate a result here, then use exclam.ai to turn their owned notes into flashcards, quizzes, and a weekly plan. ## Where HP 12C is relevant I checked current calculator policies before placing this page. The HP 12C is a fit for CFA and several adjacent finance credentials, but not for exclam.ai's current SOA actuarial section. [CFA Program Allowed CFA Institute authorizes the HP 12C family and TI BA II Plus family.](https://www.cfainstitute.org/about/governance/policies/cfa-calculator-policy) [FRM Allowed GARP lists HP 12C models among the business calculators authorized for FRM exams.](https://www.garp.org/frm/exam-policies) [CAIA Allowed CAIAA authorizes HP 12C models and TI BA II Plus models.](https://caia.org/content/caiaa-examination-calculator-policy) [CFP Allowed CFP Board lists HP 12c and HP 12c Platinum among approved calculators.](https://www.cfp.net/certification-process/exam-requirement/about-the-cfp-exam/what-to-expect-on-exam-day/what-to-bring-to-the-exam) [CMA Allowed IMA permits HP 12c and HP 12c Platinum for CMA exams.](https://prodcm.imanet.org/-/media/IMA/Files/Home/IMA-Certifications/CMA-Certification/CMA-Handbook-3132024.ashx) [SOA actuarial Not on SOA list SOA lists approved Texas Instruments models; HP 12C is not part of the SOA-approved set.](https://www.soa.org/education/exam-req/exam-day-info/edu-calculators/) ## Prefer the BA II Plus workflow? The other CFA-approved calculator family uses algebraic entry and worksheet keys instead of RPN. Use the BA II Plus-style page if that matches the calculator you plan to bring on exam day. [Open BA II Plus-style calculator](https://exclam.ai/cfa/ba-ii-plus-calculator/index.md) ## Studying for CFA or finance exams? exclam.ai turns owned prep PDFs and notes into a daily plan with flashcards, quizzes, and review. Use this calculator for desk math, then use exclam.ai for the study system around it. [CFA study workflow](https://exclam.ai/use-cases/cfa/index.md) Sitting the CFA exam? . Related calculators ## CFA finance tools [CFA hub](https://exclam.ai/cfa/index.md) [BA II Plus-style calculator TVM, cash-flow, amortization, NPV, and IRR practice with algebraic entry. All levels Calculator keystrokes](https://exclam.ai/cfa/ba-ii-plus-calculator/index.md) [Binomial option pricing visualizer Stock tree, option tree, risk-neutral probability, delta, and American exercise nodes. 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No. This is an independent HP 12C-style financial calculator that recreates common RPN, TVM, NPV, and IRR workflows in the browser. It does not use HP ROMs, HP firmware, or copied calculator assets. Can I use it for CFA, finance, or real estate practice? Yes. It is built for common study and desk-check workflows: RPN arithmetic, loan payments, present value, future value, NPV, IRR, and mortgage-style TVM problems. Do actuarial candidates use the HP 12C? Not for the SOA/CAS actuarial exam path exclam.ai currently covers. SOA lists Texas Instruments models only, so this calculator is filed under CFA rather than actuarial. How does the TVM row work? Type a number, then press n, i, PV, PMT, or FV to store it. Press a TVM key without typing a new number to solve that register from the other four values. What does RPN mean? Reverse Polish notation means you enter the numbers before the operator. For example, 12 ENTER 3 + produces 15. This feels different at first, but it reduces parentheses once you get used to the stack. Can this replace my exam-day calculator? No. Use it for browser practice, checking work, and learning the workflow. For an exam, practice on the physical calculator model you are allowed to bring and check the official calculator policy before test day. Why does payment sometimes show as a negative number? Financial calculators use cash-flow signs. Money you receive and money you pay should have opposite signs, so a loan payment usually appears negative when PV is positive. HP and HP 12C are trademarks of their respective owner. CFA Institute does not endorse, promote, or warrant third-party prep tools. exclam.ai is not affiliated with, sponsored by, or endorsed by HP. This page is an independent calculator workalike for educational and general finance use.