99Calculations.com
🔧 All 50 Tools
🔬
Scientific Calculator
Full scientific calculator with sin, cos, tan, log, power and square root.
⭐ Used by 15,670 people
DEG
0

Our Scientific Calculator performs advanced mathematical calculations including trigonometry, logarithms, powers and factorials — all in your browser!

Available Functions

FunctionExampleResult
sin(x)sin(90)1
cos(x)cos(0)1
tan(x)tan(45)1
sqrt(x)sqrt(144)12
log(x)log(100)2
ln(x)ln(e)1
x^y2^101024
fact(n)fact(5)120

DEG vs RAD Mode

DEG mode: sin(90) = 1 ✅ (use for everyday calculations)
RAD mode: sin(π/2) = 1 ✅ (use for engineering/physics)

Order of Operations

Calculator follows BODMAS/PEMDAS: Brackets → Powers → Division/Multiplication → Addition/Subtraction

📖 Complete Guide
Formulas, examples, tips & FAQs
Read Article →

Frequently Asked Questions

What functions does the scientific calculator have?

It supports trigonometric functions like sin, cos, and tan, logarithms, powers, roots, factorials, and constants such as pi, alongside standard arithmetic.

Does it work in degrees or radians?

Scientific calculators can operate in either mode. Make sure the correct mode is selected before using trigonometric functions, as results differ between degrees and radians.

Can I use it for algebra and exponents?

Yes. You can calculate powers, square and cube roots, and exponents, making it suitable for school, college, and engineering calculations.