Calc Pro Quick Reference: Keys, Modes & Formulas

Bookmark this page! Here's everything you need to use Calc Pro effectively, all in one place.

The 10 Calculators

Mode	Best For
Standard	Daily math, shopping, tips
Scientific	Trigonometry, logarithms, advanced math
Graphing	Visualizing equations
Base Conversions	Programming, binary/hex
Unit Converter	Measurements (37 categories)
Currency	165+ currencies, 50 cryptocurrencies
Constants	Nearly 2,000 science constants
Financial	23 worksheets: loans to options
Statistics	Data analysis, regression
Date & Time	Date calculations, moon phases

Entry Modes

Choose in Options → Calculator → Calculator mode. See RPN and Calculator Modes.

Mode	How it works	2 + 3 × 4
Normal	Calculates left to right as you go	20
Algebraic	Order of operations; number first, then function (30 sin)	14
Direct Algebraic	Order of operations; functions as written (sin 30)	14
Expression	Type the whole expression, then press =	14
RPN	Numbers first, then the operation: 3 Enter 4 × 2 +	14

RPN keys: Enter (in place of =), X<>Y (swap), R Up and Roll (rotate the stack) and Drop.

Display Formats

Choose in Options → Calculator → Notation. See Scientific Notation and Display Formats.

Format	Example (12,345)
Normal	12345
Scientific	1.2345e4
Engineering	12.345e3
Fractions	Results as fractions where possible
Fixed	2 to 10 decimal places

Standard Calculator

Basic Operations

Button	Function
+	Add
−	Subtract
×	Multiply
÷	Divide
=	Calculate
%	Percent
±	Change sign

Clear Functions

Button	Function
C	Clear all
CE	Clear entry only
⌫	Backspace

Memory

Button	Function
MS	Store to memory
MR	Recall from memory
MC	Clear memory
M+	Add to memory
M−	Subtract from memory

Scientific Calculator

Trigonometric (Primary)

Button	Function
sin	Sine
cos	Cosine
tan	Tangent

Trigonometric (2ndF)

Button	Function
sin	Arcsine (sin⁻¹)
cos	Arccosine (cos⁻¹)
tan	Arctangent (tan⁻¹)

Logarithmic

Button	Primary	2ndF
log	log₁₀(x)	10ˣ
ln	ln(x)	eˣ

Powers & Roots

Button	Primary	2ndF
x²	Square	Cube (x³)
√x	Square root	Cube root (³√x)
xʸ	Power	y-th root (ʸ√x)

Special Functions

Button	Function
x!	Factorial
1/x	Reciprocal
π	Pi (3.14159...)
EE	Scientific notation
( )	Parentheses

Angle Modes

Mode	Units
DEG	Degrees (360° circle)
RAD	Radians (2π circle)
GRAD	Gradians (400 circle)

Base Conversions

Number Systems

Base	Digits
BIN (2)	0, 1
OCT (8)	0-7
DEC (10)	0-9
HEX (16)	0-9, A-F

Bitwise Operations

Op	Function
AND	Bitwise AND
OR	Bitwise OR
XOR	Exclusive OR
NOT	Bitwise NOT
LSH	Left shift
RSH	Right shift

Financial Worksheets

Worksheet	Use For
Mortgage	Home loan payments, extra payments
Loan	General loan calculations
Compound Interest	Investment growth
Depreciation	Asset depreciation
Date Calculator	Days between dates
Profit Margin	Business profitability
Tip Calculator	Restaurant tips
Break-Even	Business analysis
Percent Change	Price changes
TVM ★	Time value of money
Cash Flow ★	NPV and IRR
Lease ★	Lease payments and total cost
Retirement ★	Retirement savings and income
Savings Goal ★	Monthly deposit to reach a goal
Credit Card Payoff ★	Months to pay off, total interest
Inflation ★	Future cost, purchasing power
Bond ★	Price and yield to maturity
Stock Return ★	Gain/loss and annualized return
Average Cost ★	Dollar-cost averaging
Dividend Income ★	Dividend income with reinvestment
Options P/L ★	Calls, puts, covered calls
Black-Scholes ★	Option price and Greeks
Position Size ★	Shares to buy for your risk

★ Pro Premium in the iPhone & iPad app. Amortization schedules and PDF export are also Pro Premium.

TVM Variables

Variable	Meaning
N	Number of periods
I/Y	Interest rate/year
PV	Present value
PMT	Payment
FV	Future value

Statistics

Descriptive Statistics

Statistic	Symbol
Count	n
Sum	Σx
Mean	x̄
Median	Med
Mode	Mo
Std Dev	s
Variance	s²

Regression Types

Linear: y = a + bx
Logarithmic: y = a + b·ln(x), or base 10: y = a + b·log(x)
Exponential: y = a·bˣ
Power: y = a·xᵇ
Reciprocal: y = a + b/x
Quadratic: y = ax² + bx + c
Cubic ★: y = ax³ + bx² + cx + d
Quartic ★: y = ax⁴ + bx³ + cx² + dx + e
Logistic ★: y = c / (1 + a·e⁻ᵇˣ)

★ Pro Premium in the iPhone & iPad app, along with distributions, confidence intervals and hypothesis tests.

Constants Quick Reference

Mathematical

Constant	Value
π	3.14159265...
e	2.71828182...
φ (Golden)	1.61803398...

Physical (SI Units)

Constant	Value
c (light)	2.998 × 10⁸ m/s
G (gravity)	6.674 × 10⁻¹¹
h (Planck)	6.626 × 10⁻³⁴ J·s
Nₐ (Avogadro)	6.022 × 10²³
e (charge)	1.602 × 10⁻¹⁹ C

Keyboard Shortcuts (Desktop)

Numbers & Decimals

Key	Action
0-9	Enter digit
.	Decimal point
Backspace	Delete

Operations

Key	Action
+	Add
-	Subtract
*	Multiply
/	Divide
Enter	Equals
Esc	Clear

Common Formulas

Percentages

X% of Y = Y × X ÷ 100
Y + X% = Y × (1 + X/100)
Y − X% = Y × (1 − X/100)

Compound Interest

A = P(1 + r/n)^(nt)

Loan Payment

PMT = PV × [r(1+r)ⁿ] / [(1+r)ⁿ − 1]

Distance-Rate-Time

Distance = Rate × Time

Quadratic Formula

x = (−b ± √(b²−4ac)) / 2a

Quick Conversions

Temperature

°F = °C × 9/5 + 32
°C = (°F − 32) × 5/9

Length

1 inch = 2.54 cm
1 mile = 1.609 km
1 foot = 0.3048 m

Weight

1 pound = 0.4536 kg
1 ounce = 28.35 g

Volume

1 gallon (US) = 3.785 L
1 cup = 237 mL

Tips for Success

Use 2ndF for inverse functions
Use Memory for multi-step calculations
Check angle mode before trig functions
Use EE for scientific notation
Compare regression r² for best fit

Troubleshooting

Problem	Solution
Wrong trig result	Check DEG/RAD mode
Unexpected result	Check order of operations
Memory not working	Try MC first to clear
Display shows E	Result overflow

All Calc Pro Guides

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Calc Pro Quick Reference Card: Every Key and Mode at a Glance