How To Use Sharp Financial Calculator

Calculate complex financial scenarios with precision using our interactive Sharp financial calculator tool.

Introduction to Financial Calculators

Financial calculators are essential tools for making informed investment decisions, planning for retirement, or evaluating loan options. The Sharp financial calculator series, particularly models like the EL-738 and EL-733A, are widely used by financial professionals for their advanced functions and reliability.

This guide will walk you through the key features of Sharp financial calculators and how to use them effectively for various financial calculations.

Understanding the Basic Functions

Before diving into complex calculations, it’s important to understand the basic functions of your Sharp financial calculator:

• Time Value of Money (TVM) Keys: These include N (number of periods), I/Y (interest rate per year), PV (present value), PMT (payment), and FV (future value).
• Cash Flow Keys: Used for uneven cash flow analysis (CFj, Nj keys).
• Amortization Functions: For calculating loan payments and creating amortization schedules.
• Statistical Functions: For mean, standard deviation, and other statistical calculations.
• Memory Functions: For storing and recalling values during calculations.

Step-by-Step Guide to Common Calculations

1. Calculating Future Value of an Investment

To calculate the future value of a single sum investment:

1. Press the 2nd key then CLR TVM to clear previous calculations.
2. Enter the number of periods (N). For 5 years, enter 5.
3. Enter the annual interest rate (I/Y). For 6%, enter 6.
4. Enter the present value (PV) as a negative number. For $10,000, enter -10000.
5. Press CPT then FV to calculate the future value.

Pro Tip: For compounding periods other than annually, divide the annual interest rate by the number of compounding periods per year and multiply the number of years by the compounding periods. For quarterly compounding of a 5-year investment, you would use N=20 and I/Y=1.5 (6%/4).

2. Calculating Loan Payments

To determine monthly payments on a loan:

1. Clear the TVM registers (2nd + CLR TVM).
2. Enter the number of payments (N). For a 30-year mortgage with monthly payments, enter 360.
3. Enter the annual interest rate (I/Y). For 4.5%, enter 4.5.
4. Enter the present value (PV) as a positive number (loan amount). For $250,000, enter 250000.
5. Press CPT then PMT to calculate the payment.

3. Calculating Internal Rate of Return (IRR)

For investments with uneven cash flows:

1. Press 2nd then CLR WORK to clear cash flow registers.
2. Enter the initial investment as a negative cash flow (CFj).
3. Enter the frequency of this cash flow (Nj), typically 1.
4. Enter subsequent cash flows with their frequencies.
5. Press 2nd then IRR/YR to calculate the internal rate of return.

Advanced Financial Calculations

Net Present Value (NPV) Analysis

NPV calculations help determine the present value of future cash flows minus the initial investment:

1. Clear the cash flow registers.
2. Enter the discount rate (I/Y).
3. Enter the initial investment as a negative CFj.
4. Enter subsequent cash flows with their frequencies.
5. Press 2nd then NPV to calculate the net present value.

Bond Valuation

Sharp financial calculators can value bonds using the following steps:

1. Enter the bond’s settlement date and maturity date to calculate the number of periods.
2. Enter the coupon rate (as the PMT).
3. Enter the yield to maturity (as I/Y).
4. Enter the face value (as FV).
5. Press CPT then PV to calculate the bond’s current price.

Important Note: For accurate bond calculations, ensure you’re using the correct day count convention (actual/actual, 30/360, etc.) as specified in the bond’s terms.

Comparison of Sharp Financial Calculator Models

The following table compares popular Sharp financial calculator models to help you choose the right one for your needs:

Model	Display	Functions	Memory	Battery Life	Best For
EL-738	12-digit LCD	TVM, cash flow, amortization, bond calculations, depreciation, statistics	10 memory registers	3 years	Professional financial analysis
EL-733A	10-digit LCD	TVM, cash flow, amortization, basic statistics	4 memory registers	2 years	Business students, basic financial calculations
EL-735	10-digit LCD	TVM, amortization, basic statistics	3 memory registers	2 years	Entry-level financial calculations
EL-738C	12-digit LCD (color)	All EL-738 functions + currency conversion, profit margin calculations	20 memory registers	3 years	Advanced financial professionals

Statistical Analysis with Sharp Financial Calculators

Sharp financial calculators offer robust statistical functions that are valuable for financial analysis:

Mean and Standard Deviation

1. Enter data mode by pressing 2nd then DATA.
2. Enter your data points one by one, pressing DATA after each entry.
3. Press 2nd then x̄ for the mean.
4. Press 2nd then s for the sample standard deviation.
5. Press 2nd then σ for the population standard deviation.

Linear Regression

For analyzing relationships between variables:

1. Enter data mode and input your x,y data pairs.
2. Press 2nd then STAT to access regression functions.
3. Select the type of regression (linear, logarithmic, exponential, etc.).
4. The calculator will display the regression equation coefficients.

Depreciation Calculations

Sharp financial calculators can compute various depreciation methods:

Straight-Line Depreciation

Formula: (Cost – Salvage Value) / Useful Life

While the calculator doesn’t have a dedicated straight-line function, you can easily compute it using basic arithmetic.

Declining Balance Depreciation

1. Enter the asset’s cost (initial value).
2. Enter the depreciation rate (e.g., 150% or 200% of straight-line rate for accelerated depreciation).
3. Enter the salvage value.
4. Enter the useful life in years.
5. Use the depreciation function to calculate annual depreciation amounts.

Sum-of-Years’ Digits Depreciation

Sharp calculators can compute this method which provides more accelerated depreciation than straight-line but less than declining balance:

1. Enter the asset’s cost.
2. Enter the salvage value.
3. Enter the useful life in years.
4. Use the SYD function to calculate annual depreciation.

Break-Even Analysis

Break-even analysis helps determine the point at which total costs equal total revenue:

1. Enter fixed costs.
2. Enter variable cost per unit.
3. Enter selling price per unit.
4. Use the break-even function to calculate the break-even point in units.
5. Multiply by selling price to get the break-even point in dollars.

Business Application: Break-even analysis is crucial for startups and new product launches to determine minimum sales requirements for profitability.

Profit Margin Calculations

Calculate gross, operating, and net profit margins:

1. For gross margin: (Revenue – COGS) / Revenue × 100
2. For operating margin: Operating Income / Revenue × 100
3. For net margin: Net Income / Revenue × 100

Advanced models like the EL-738C have dedicated profit margin functions that streamline these calculations.

Currency Conversion and Exchange Rates

Models with currency conversion functions (like EL-738C) can:

• Store multiple exchange rates
• Convert between currencies instantly
• Calculate cross rates between non-base currencies
• Handle inverse conversions

To use these functions:

1. Enter the exchange rate (e.g., 1 USD = 0.85 EUR).
2. Store the rate in memory.
3. Enter the amount to convert.
4. Press the conversion key to get the equivalent in the target currency.

Common Mistakes to Avoid

When using financial calculators, be aware of these common pitfalls:

1. Incorrect Cash Flow Signs: Always enter cash outflows (like investments) as negative and inflows as positive.
2. Mismatched Compounding Periods: Ensure your compounding frequency matches your period inputs (e.g., monthly compounding with monthly payments).
3. Forgetting to Clear Memory: Always clear previous calculations (2nd + CLR TVM or 2nd + CLR WORK) before starting new ones.
4. Ignoring Payment Timing: Specify whether payments are at the beginning or end of periods (use the BEG/END mode).
5. Incorrect Interest Rate Input: Enter the annual rate, not the periodic rate (the calculator will adjust for compounding).
6. Round-off Errors: For precise calculations, keep intermediate results in the calculator rather than rounding.

Maintenance and Care

To ensure your Sharp financial calculator remains accurate and functional:

• Replace the battery when the display becomes dim (typically every 2-3 years with normal use).
• Clean the calculator with a slightly damp cloth – never use harsh chemicals.
• Store in a protective case when not in use to prevent damage to the keys.
• Avoid extreme temperatures which can affect the LCD display.
• Press all keys firmly but don’t use excessive force.
• If the calculator will be unused for extended periods, remove the battery to prevent corrosion.

Learning Resources

To master your Sharp financial calculator, consider these resources:

• Official Manual: Always start with the manual that came with your calculator. It provides model-specific instructions.
• Online Tutorials: Many financial websites offer video tutorials for specific calculations.
• Practice Problems: Work through financial math problems to gain proficiency with different functions.
• Financial Courses: Many finance and accounting courses include calculator training as part of their curriculum.

For authoritative information on financial calculations and principles, consider these resources:

• U.S. Securities and Exchange Commission (SEC) – For investment regulations and financial disclosure requirements
• Federal Reserve Economic Data (FRED) – For economic data and interest rate information
• Internal Revenue Service (IRS) – For tax-related financial calculations and depreciation rules
• Khan Academy – Finance Courses – For free educational content on financial concepts

Comparison of Financial Calculator Brands

The following table compares Sharp financial calculators with other popular brands:

Feature	Sharp	HP 12C	Texas Instruments BA II+	Casio FC-200V
Display Type	LCD (some color models)	LCD (reverse Polish notation)	LCD	LCD
Programmability	Limited	Yes (RPN)	No	Limited
TVM Calculations	Yes	Yes	Yes	Yes
Cash Flow Analysis	Yes (up to 24 cash flows)	Yes (up to 20 cash flows)	Yes (up to 24 cash flows)	Yes (up to 32 cash flows)
Amortization	Yes	Yes	Yes	Yes
Bond Calculations	Yes	Yes	Yes	Yes
Depreciation	Yes	Yes	Yes	Yes
Statistical Functions	Basic to Advanced	Basic	Basic	Advanced
Memory Registers	4-20 depending on model	20	10	10
Battery Life	2-3 years	3-5 years	2-3 years	2-3 years
Price Range	$30-$80	$60-$100	$30-$50	$30-$70
Best For	Students to professionals	Professionals (RPN users)	Students, basic finance	Students to professionals

Advanced Applications

Option Pricing (Black-Scholes Model)

While Sharp calculators don’t have dedicated option pricing functions, you can program the Black-Scholes formula using the calculator’s memory and mathematical functions. The formula requires:

• Current stock price
• Strike price
• Time to expiration
• Risk-free interest rate
• Volatility

Capital Budgeting

For evaluating investment projects:

1. Calculate NPV for each project using the cash flow functions
2. Compute IRR for comparison with hurdle rates
3. Calculate payback periods
4. Analyze profitability indexes

Retirement Planning

Use the TVM functions to:

• Determine required savings for retirement goals
• Calculate sustainable withdrawal rates
• Analyze different retirement scenarios
• Compare immediate vs. deferred annuities

Troubleshooting Common Issues

If your Sharp financial calculator isn’t working properly:

Display Issues

• If the display is faint, replace the battery
• If segments are missing, the calculator may need repair
• Contrast can sometimes be adjusted with a small screw on the back

Calculation Errors

• Always clear memory before new calculations
• Double-check that you’re in the correct calculation mode
• Verify all inputs are correct (especially signs for cash flows)
• Consult the manual for specific error codes

Key Problems

• If keys are sticky, clean with a damp cloth
• If a key doesn’t respond, the calculator may need professional cleaning
• Avoid using sharp objects to press keys

Conclusion

Mastering your Sharp financial calculator opens up a world of precise financial analysis capabilities. From basic time value of money calculations to complex cash flow analysis and statistical functions, these calculators are powerful tools for students and professionals alike.

Remember that while the calculator performs the computations, understanding the underlying financial concepts is crucial for proper interpretation of results. Regular practice with different types of financial problems will help you become proficient with all the calculator’s functions.

Whether you’re preparing for the CFA exam, managing investments, or running a business, your Sharp financial calculator will be an invaluable tool for making data-driven financial decisions.