Free Online Scientific Calculator

What Is a Scientific Calculator?

A scientific calculator extends a basic calculator with functions needed for advanced math: trigonometry (sin, cos, tan), logarithms, exponents, roots, and memory storage. ToolKit Pro's version runs entirely in your browser and supports both degree (DEG) and radian (RAD) modes.

How to Use This Tool

1. Enter numbers using the on-screen keypad.
2. Use sin, cos, tan, log or ln for advanced functions.
3. Switch between DEG and RAD mode depending on your calculation.
4. Use MC, MR, MS, M+ and M− to store and recall values in memory.
5. Press = to see your result.

Supported Mathematical Functions

• Trigonometry: sin, cos and tan, in both DEG and RAD modes.
• Logarithms: log (base 10) and ln (natural log).
• Powers & roots: x², x³, xʸ (custom power) and √x (square root).
• Constants: π (pi) and e (Euler's number).
• Other functions: 1/x (reciprocal), |x| (absolute value), and % (percentage).
• Memory: MC (clear), MR (recall), MS (store), M+ (add) and M− (subtract).

Benefits of Using ToolKit Pro's Scientific Calculator

• Full function set — trigonometry, logarithms, powers, roots.
• DEG/RAD toggle — switch modes for angle-based calculations.
• Memory functions — store and recall values mid-calculation.
• No installation — works instantly in any browser.

Why Use ToolKit Pro?

Whether you're a student working through trigonometry homework, an engineer running quick checks, or anyone needing more than basic arithmetic, ToolKit Pro's scientific calculator gives you the full function set without needing a physical calculator or app download.

Real-Life Examples

• Trigonometry homework: finding sin(45°) or cos(30°) instantly.
• Engineering checks: quick logarithm or exponent calculations.
• Finance or stats: using powers and roots in formulas.

Helpful Tips

• Remember to check whether you're in DEG or RAD mode before running trigonometric functions — this is a common source of incorrect results.
• Use the memory functions (M+, M−, MR, MC) to avoid re-typing intermediate results in multi-step calculations.