Scientific Calculator
A full scientific calculator — trig, logs, powers, factorials, and constants.
A full scientific calculator with trigonometry (degrees or radians), logarithms, powers and roots, factorials, and the constants π and e. Type with your keyboard or tap the keypad — results update as you go.
Everything is evaluated in your browser with a safe expression parser (no dynamic code execution), and your calculations never leave your device.
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Formula
Order of operations
() → functions → ^ → × ÷ % → + −
Standard precedence; use parentheses to group. Implicit multiplication works too (2π, 2(3+4)).
Angle mode
DEG: 360° = 2π RAD
Trig functions use degrees or radians depending on the selected mode.
How to use the scientific calculator
- 1Choose DEG or RAD for trigonometry, and toggle INV for inverse functions (asin, acos, atan).
- 2Type an expression with the keypad or your keyboard — Enter evaluates, Backspace deletes, Esc clears.
- 3Tap any history entry below to restore that calculation.
Examples
| Example | Input | Result |
|---|---|---|
| Trig | sin(30) in DEG | 0.5 |
| Identity | sin(45)² + cos(45)² | 1 |
| Factorial | 5! | 120 |
What this calculator can do
Beyond basic arithmetic, this calculator handles trigonometric functions (sin, cos, tan and their inverses), base-10 and natural logarithms (log and ln), exponentials, square roots, powers with the ^ operator, factorials with !, the modulo operator %, and the constants π and e. You can chain operations and nest parentheses to build complex expressions like sin(45)^2 + cos(45)^2.
Degrees vs. radians
Trigonometric functions need to know how angles are measured. In DEG mode, sin(30) = 0.5; in RAD mode, the same 0.5 comes from sin(π/6). A full circle is 360 degrees or 2π radians. Everyday geometry usually uses degrees, while calculus and physics use radians — switch modes with the DEG/RAD toggle.
Safe and private by design
Many online calculators evaluate expressions by running them as code, which is a security risk. This one uses a purpose-built tokenizer and parser that only understands math — there is no dynamic code execution at all. And like every Numvella tool, the numbers you enter stay in your browser.
Frequently asked questions
How do I calculate sine, cosine, and tangent?
Select DEG or RAD mode, then press sin/cos/tan followed by your angle in parentheses. Example: sin(30) in degrees = 0.5. In radians, sin(π/6) = 0.5.
What is the difference between DEG and RAD mode?
DEG (degrees) measures angles in 0–360 units. RAD (radians) measures angles in 0–2π units. Most everyday calculations use degrees; radians are standard in mathematics and physics. 360° = 2π radians.
How do I calculate a square root?
Press √ then enter your number in parentheses: √(144) = 12. Or type sqrt(144).
What does log vs ln mean?
log is logarithm base 10 (log(100) = 2). ln is the natural logarithm base e (ln(e) = 1, ln(100) ≈ 4.605). Use log for decibels, pH, and Richter scale; use ln for growth/decay problems and calculus.
How do I calculate a factorial?
Enter a whole number and press !. Example: 5! = 120, 10! = 3,628,800. Factorials grow very fast — 171! exceeds the maximum floating-point value.
What is π (pi)?
π ≈ 3.14159265358979. It is the ratio of a circle's circumference to its diameter. Press the π button to insert its full precision value.
How do I use inverse trigonometric functions?
Press INV to switch to inverse mode, then press sin (now asin), cos (acos), or tan (atan). asin(0.5) in degrees = 30°.
Can I use this calculator for complex expressions?
Yes — you can chain operations, use parentheses for grouping, and combine functions. Example: sin(45)^2 + cos(45)^2 = 1 (Pythagorean identity).
Embed this calculator
Add the Scientific Calculator to your own website — free. Copy and paste this snippet:
<iframe src="https://numvella.com/embed/scientific-calculator" width="100%" height="460" style="border:1px solid #e2e8f0;border-radius:12px" title="Scientific Calculator — Numvella" loading="lazy"></iframe>