Scientific Calculator
Free online scientific calculator with trigonometry, logarithms, exponents, and memory functions. Evaluate complex mathematical expressions instantly.
How to Use Scientific Calculator
- 1Enter numbers and operators using the on-screen buttons or your keyboard.
- 2Use function buttons (sin, cos, log, ln) for scientific operations.
- 3Toggle DEG/RAD to switch between degrees and radians for trig functions.
- 4Use M+ to store a value in memory and MR to recall it.
- 5Press = or Enter to evaluate the expression.
About Scientific Calculator
The Scientific Calculator handles advanced mathematical operations beyond basic arithmetic: trigonometric functions (sin, cos, tan and their inverses), natural and base-10 logarithms, square roots, powers, factorials, and memory storage. Supports both degrees and radians and evaluates multi-step expressions with correct operator precedence.
Frequently Asked Questions
- What functions does the scientific calculator support?
The calculator supports all standard arithmetic (+, −, ×, ÷, %), trigonometric functions (sin, cos, tan and their inverses), logarithms (log base 10 and natural log ln), square root, powers (xⁿ), factorial (n!), absolute value, mathematical constants (π, e), and memory storage (MC, MR, M+, M−).
- What is the difference between DEG and RAD mode?
DEG (degrees) and RAD (radians) determine how angles are interpreted by trigonometric functions. In DEG mode, sin(90) = 1 (90 degrees). In RAD mode, sin(π/2) = 1 (π/2 radians ≈ 1.5708). For most everyday calculations use DEG; for calculus and physics, use RAD.
- How do I calculate sin, cos, or tan of an angle?
Enter the angle value first, then press the sin, cos, or tan button. Make sure you are in the correct angle mode (DEG or RAD). For example, in DEG mode, entering 45 then pressing sin gives 0.7071 (sin 45°).
- How do I use the memory functions?
MS stores the current value in memory. MR recalls the stored memory value. M+ adds the current value to memory. M− subtracts the current value from memory. MC clears memory to zero. The memory indicator shows the stored value when memory is not empty.
- What is the order of operations?
The calculator follows standard mathematical precedence (PEMDAS/BODMAS): parentheses first, then exponents, then multiplication and division (left to right), then addition and subtraction (left to right). Use parentheses to control the order of complex expressions.
- How do I calculate a number to a power?
Use the xⁿ button: enter the base, press xⁿ, then enter the exponent, and press =. For example: 2 xⁿ 8 = 256. For square (x²), enter the number and press x² directly. For square root, press √ after entering the number.
- Why does my trigonometry result look wrong?
Check your angle mode — this is the most common cause. If you expected sin(90) = 1 but got −0.448, you are in RAD mode (sin of 90 radians ≠ sin of 90°). Click the DEG button to switch to degrees mode.
Looking for more tools like this? Browse all Calculator Tools →
More Calculator Tools
Percentage Calculator
Calculate percentages, percentage change, and what percent one number is of another. Free online percentage calculator for everyday math.
Age Calculator
Calculate exact age in years, months, and days from a birth date. Free online age calculator with next birthday countdown and life statistics.
TDEE Calculator
Calculate your Total Daily Energy Expenditure free online. Find your daily calorie needs based on weight, height, age, and activity level instantly.
BMI Calculator
Calculate your Body Mass Index free online. Enter your height and weight to get your BMI score, category, and healthy weight range instantly.
Tip Calculator
Calculate tips and split bills free online. Enter your bill total, tip percentage, and number of people to instantly see tip amount and per-person cost.
Compound Interest Calculator
Calculate compound interest growth on savings and investments free online. See how money grows over time with annual, monthly, or daily compounding.
You Might Also Like
Word Counter
Count words, characters, sentences, and paragraphs instantly. Free online word counter tool with reading time estimate for writers and students.
Character Counter
Count characters with and without spaces instantly. Free online character counter for Twitter, Instagram, SMS, and meta tag length limits.
JSON Formatter
Format, validate, and minify JSON online. Instantly beautify or compress JSON data with syntax highlighting. Free JSON formatter and validator.
Last updated: May 2, 2026 — Scientific Calculator by CalcDash.