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CALC 1 10bii Calculator

This calculator has the functions of a 10bii on a CALC 1 Focused Calculator.

It is similar to the HP 10b Reproduction but it is a CALC 1 Focused Calculator with the following advantages:


The CALC 1 10bii has a few minor difference. For most cases using the long press gesture on any key will display a hint for that key. CALC 1 has separate "clearing" keys for stats (Cl Σ), TVM (C TVM), cash flows (C CF) and markup (C MU) .


You press "STO P/YR" to store the payments per year.


Interest, principal and balance are all calculated at the same time after entering the periods and pressing shift AMORT. You can swipe up and down to display more rows of the automatic stack or use the ROLL key to display the values. The History details will display all of the inputs and calculations.

NOM% ad EFF%

You press "STO EFF%" to store the effective rate used to calculate the nominal rate. For different payments and compounding periods, you can also use the TVM Focused Calculator to STO the separate P/YR (payments per year) and C/YR (compounding periods per year) and the calculator will automatically convert the rates.

Markup and Margin

This is done the same as the 10bii. This advantage of this calculator is that the key previews show you the values. You can easily see the non-zero MU or MAR that will be used in the COST or PRICE calculations. The History details will display all of the inputs and calculations. See the Percentages Focused Calculator for examples.

Cash Flows

This calculator is the same except for grouped cash flows. For grouped cash flows you key in the CF value, then INPUT, then then "shift Nj". See the Cash Flow Examples. The List Manager (tab f for the financial cash flows) is an easy way to verify and edit the data you entered. The data is shared with the Cash Flows Focused Calculator if you want to calculate additional functions like NFV and MIRR.


CALC 1 uses list based stats instead of summary stats. Instead of the Σ- key you use the List Manager to review, enter and edit data. You can also paste data using the list manager. The Σ+ will enter the values will always enter x and y register values. Data is shared with the Statistics 1 and Statistics 2 Focused Calculators so they can be used if you want more statistical functions than those on the 10bii.

In addition to the "x est" and "y est" keys, the Curve Fitting Focused Calculators will provide an easier to use calculator for the LIN curve fitting on the 10bii, and the additional curve fitting found on the 10bii+.


CALC 1 uses just 1 "un-shifted" key for M+. So instead of →M with your initial value, you press "shift CM" to clear the M+ list. With each value you enter CALC 1 returns the running total. There is also a "RCL RM" key. The last value can be recalled using "RCL last x". You can use the List Manager to review, enter and edit data. The History Details contains a copy of the list that you can share. See the Percentages Focused Calculator for examples.

Additional Information

See the Time Value of Money (TVM) Overview for general TVM information.

See the Amortization Examples for additional information on this calculator. This calculator calculates interest, principle and balance for any two periods. It also shares data with the Amortization From Calculator that will generate tables and graphs.

Also see the Time Value of Money Form Calculator or Loan Form Calculator.

This calculator uses the first formula in Time Value of Money Compound Interest Formulas.

All of these calculators share the same values so you can start a calculation with one calculator and then switch to the other without having to re-enter the values. This applies to the HP reproduction calculators, 12C and 10bii.

For the other keys:

Using the "long press" gesture will display a hint about any key. (Video: Displaying a hint) .

Calculation Methods Used by CALC 1

Also see

Storing and Recalling Numbers.