Scientific Calculator Online 2026 | Free Advanced Math Calculator

🔬 Scientific Calculator

Free Online Advanced Math Calculator 2026

100% Free | All Functions | By: OmniCalculator.Space
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Trig, Log, Exponents, Memory & More — No Download Required

📊 About This Scientific Calculator

This free online scientific calculator provides professional-grade mathematical functionality including trigonometric functions (sin, cos, tan), logarithms (log, ln), exponents & roots, factorials, and memory operations. It supports three angle modes (DEG, RAD, GRAD), follows standard order of operations (PEMDAS), and works on any device. Perfect for students, engineers, scientists, and anyone working with advanced mathematics in 2026.

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📋 Quick Navigation

How to Use
Functions Guide
Trigonometry
Logarithms
Keyboard Shortcuts
Examples
FAQs

📝 How to Use This Scientific Calculator

1
Enter Numbers

Click number buttons (0-9) or type using keyboard. Use the decimal point (.) for decimals like 3.14 or 0.001.

2
Choose Operation

Click operators (+, −, ×, ÷) for basic math or function buttons (sin, log, √) for advanced operations.

3
Set Angle Mode

Before using trig functions, select DEG (degrees), RAD (radians), or GRAD (gradians). DEG is most common.

4
Use Functions

Click function first (sin, log, √), then enter number and close with ). Example: sin(30) for sine of 30°.

5
Use Memory

MS stores value, MR recalls it, MC clears, M+ adds to memory, M− subtracts. Great for multi-step calculations.

6
Get Result

Press = or Enter to calculate. Previous calculation shows in history. Use CE to clear entry, AC to reset all.

💡 Pro Tips

  • Parentheses matter: (2+3)×4 = 20, but 2+3×4 = 14
  • Check angle mode: sin(30) = 0.5 in DEG, but -0.988 in RAD
  • Use constants: Click π for 3.14159... and e for 2.71828...
  • Keyboard works: Type numbers, operators, and press Enter for =

📐 Complete Functions Guide

Basic Arithmetic

OperationButtonExampleResult
Addition+25 + 1742
Subtraction−50 − 2327
Multiplication×12 × 896
Division÷144 ÷ 1212
Power^ or xʸ2^8256
Squarex²9²81
Square Root√√14412
Cube Root∛∛273

Trigonometric Functions

Basic Trig (requires angle input)

sin(x) — Sine of angle x
cos(x) — Cosine of angle x
tan(x) — Tangent of angle x

Inverse Trig (returns angle)

sin⁻¹(x) — Arcsine, returns angle whose sine is x
cos⁻¹(x) — Arccosine, returns angle whose cosine is x
tan⁻¹(x) — Arctangent, returns angle whose tangent is x

Trig Examples (DEG mode)

sin(30) = 0.5
cos(60) = 0.5
tan(45) = 1
sin⁻¹(0.5) = 30°

Logarithmic & Exponential Functions

Logarithms

log(x) — Common logarithm (base 10)
ln(x) — Natural logarithm (base e)

Exponentials

eˣ — e raised to power x
xʸ — x raised to power y

Log/Exp Examples

log(100) = 2 (because 10² = 100)
log(1000) = 3 (because 10³ = 1000)
ln(e) = 1 (because e¹ = e)
ln(7.389) ≈ 2 (because e² ≈ 7.389)

Special Functions

FunctionButtonExampleResult
Factorialn!5!120
Absolute Value|x||-15|15
Reciprocal1/x1/40.25
Percentage%50%0.5
Sign Toggle±±25-25
Pi Constantππ3.14159...
Euler's Numberee2.71828...

📏 Understanding Angle Modes

DEG (Degrees)

Most common mode. Full circle = 360°. Right angle = 90°. Use for everyday angles, geometry, navigation.

RAD (Radians)

Used in calculus. Full circle = 2π rad. Right angle = π/2 rad. One radian ≈ 57.3°.

GRAD (Gradians)

Used in surveying. Full circle = 400 grad. Right angle = 100 grad. Less common.

⚠️ Common Angle Mode Mistake

sin(30) in DEG mode = 0.5 (correct for 30 degrees)
sin(30) in RAD mode = -0.988 (30 radians is different!)

Always verify your angle mode before calculating trigonometric functions.

⌨️ Keyboard Shortcuts

0-9 Enter numbers
+ - * / Operators
Enter Calculate (=)
. Decimal point
( ) Parentheses
^ Power/exponent
Backspace Delete last
Escape Clear entry

📊 Worked Examples

Example 1: Calculate Area of Circle

Formula: A = πr² where r = 5

Steps:
1. Click π → displays 3.14159...
2. Click ×
3. Enter 5
4. Click x² → squares the 5
5. Click =

Result: 78.54 square units

Example 2: Compound Interest

Formula: A = P(1 + r)ⁿ where P=1000, r=0.05, n=10

Steps:
1. Enter 1000
2. Click ×
3. Enter (1+0.05)
4. Click ^
5. Enter 10
6. Click =

Result: $1,628.89

Example 3: pH Calculation

Formula: pH = -log[H⁺] where [H⁺] = 0.001 M

Steps:
1. Click log(
2. Enter 0.001
3. Click ) then = → gives -3
4. Click ± to change sign

Result: pH = 3 (acidic)

🔗 Related Calculators

Percentage Calculator
Fraction Calculator
Quadratic Formula
Slope Calculator
Pythagorean Theorem
Compound Interest
Desmos Graphing
Unit Converter

❓ Frequently Asked Questions

Why do I get different results for trig functions?
This is due to angle mode settings. sin(30) = 0.5 in DEG mode but = -0.988 in RAD mode because 30 radians ≠ 30 degrees. Always check and set your angle mode (DEG/RAD/GRAD) before using trig functions. DEG is most common for everyday use.
What's the difference between log and ln?
log is the common logarithm (base 10): log(100) = 2 because 10² = 100. ln is the natural logarithm (base e ≈ 2.718): ln(e) = 1. Use log for general calculations; ln for exponential growth/decay in science and finance.
How do I use the memory functions?
MS = Memory Store (save current value). MR = Memory Recall (retrieve saved value). MC = Memory Clear. M+ = Add to memory. M− = Subtract from memory. Useful for multi-step calculations where you need to remember intermediate results.
What does the E notation in results mean?
E notation is scientific notation for very large/small numbers. 3.5E6 means 3.5 × 10⁶ = 3,500,000. 4.2E-5 means 4.2 × 10⁻⁵ = 0.000042. The calculator uses this automatically for numbers that would otherwise require many zeros.
What's the difference between CE and AC?
CE (Clear Entry) clears only the current number, keeping your calculation in progress. AC (All Clear) resets everything including memory and history. Use CE to fix typing mistakes; AC to start completely fresh.
Why do I get ERROR?
Common causes: Division by zero (undefined), √ of negative number (not real), log of zero or negative (undefined), unmatched parentheses. Press CE or AC to clear the error and check your input.
Can I use this on my phone?
Yes! This calculator is fully responsive and works on smartphones, tablets, and desktop computers. All buttons are touch-friendly and the layout adapts to smaller screens automatically.
How accurate is this calculator?
This calculator uses double-precision floating-point arithmetic with accuracy to 15-17 significant digits. This exceeds the precision of most handheld calculators and is sufficient for educational and professional use.