Scientific calculator key quick reference
| Sign | Name | Meaning / purpose | Example |
|---|---|---|---|
| ( ) | Parentheses | Group an expression | 4×(2+3)=20 |
| x² | Square | x times x | 12²=144 |
| √ | Square root | Inverse of squaring | √144=12 |
| xʸ / ^ | Power | Raise x to exponent y | 2^10=1024 |
| 1/x | Reciprocal | 1 divided by x | 1/8=.125 |
| sin cos tan | Trig functions | Angle-to-ratio functions | sin(30°)=.5 |
| sin⁻¹ cos⁻¹ tan⁻¹ | Inverse trig | Ratio-to-angle functions | tan⁻¹(1)=45° |
| log | Common log | Base-10 logarithm | log(1000)=3 |
| ln | Natural log | Base-e logarithm | ln(e)=1 |
| EXP / EE | Scientific notation | Enter ×10^n | 6 EXP 4=60000 |
| π | Pi | Insert π | 2π≈6.28318 |
| e | Euler's number | Insert e | e≈2.71828 |
| n! | Factorial | n×(n−1)×...×1 | 5!=120 |
| Ans | Last answer | Reuse previous result | 9, then Ans×3=27 |
| SHIFT / 2nd | Second function | Use alternate label | SHIFT + sin → sin⁻¹ on many models |
| ALPHA | Variable/letter | Access variable labels | Use A, B, X, Y where supported |
| MODE / SETUP | Settings | Choose DEG/RAD, STAT, SCI, etc. | Set DEG for degree trig |
| STO RCL | Store / recall | Save and retrieve a variable | Store 12 in A |
| MC MR M+ M− | Memory | Clear, recall, add, subtract memory | 20 M+; 5 M+; MR=25 |
Three things to check before a calculation
- Angle mode: DEG or RAD?
- Grouping: do the parentheses match the written formula?
- Magnitude: does the answer roughly match your estimate?
10-minute student practice
Spend two minutes each on: parentheses, powers/roots, trigonometry, logs/scientific notation, and one mixed problem. Use the full practice exercise page when you want a longer session.
Key labels vary by calculator
Some calculators use SHIFT while others use 2nd; some use EXP, EE or ×10ˣ; fraction and variable keys also vary. The cheat sheet teaches the underlying function so you can map it to your specific model. For exact keystrokes, consult the manufacturer guidebook.
Frequently asked questions
Can I download this scientific calculator cheat sheet as a PDF?
Yes. Use the PDF download link on this page or print the page and choose Save as PDF in your browser.
Does every scientific calculator use the same symbols?
No. Core mathematical functions are similar, but key labels and secondary-function placement vary by model.
What should I check before using sin, cos or tan?
Check the angle mode. Use DEG for degree problems and RAD for radian problems unless your course specifies otherwise.
What is the difference between EXP and x^y?
EXP/EE usually enters a power-of-ten scientific-notation exponent, while x^y raises one number to another power.
Open the main calculator, choose Scientific, and try the examples with your own values.