Scientific Calculator
Use this like any handheld scientific calculator — tap or type digits and operators to build an expression, use the function keys for sin, cos, tan, log, ln, and square root, and press = to evaluate. Parentheses and exponents are fully supported, and every keypress works from your keyboard too.
How the Scientific formula works
This calculator evaluates expressions using standard mathematical order of operations (PEMDAS): parentheses first, then exponents, then multiplication and division left to right, then addition and subtraction left to right.
Example: 2 + 3 × 4 = 2 + 12 = 14, not (2+3) × 4 = 20 sin, cos, and tan use the Degree/Radian mode shown on the display — toggle it with the DEG/RAD key
Step-by-step calculation
- Tap number and operator keys to build your expression, just like a physical calculator — the full expression shows on the display as you type.
- Use function keys (sin, cos, tan, log, ln, √) to insert that function — they automatically open a parenthesis for you to enter the argument.
- Use ( and ) to group parts of an expression, and ^ for exponents.
- Press = to evaluate. Press AC to clear everything, or ⌫ to delete the last entry.
- Toggle DEG/RAD to switch how sin, cos, and tan interpret their input.
Worked example
Entering sin(30) with DEG mode on and pressing = gives 0.5, since 30° is a standard trig angle. Entering 2^10 gives 1024. Entering (5+3)×2 gives 16, correctly grouping the addition before multiplying.
Frequently asked questions
Does this calculator follow order of operations?
Yes — multiplication and division are evaluated before addition and subtraction, and parentheses and exponents take priority over both, exactly like a physical scientific calculator or standard mathematical convention.
Can I use my keyboard instead of clicking?
Yes — number keys, +, -, *, /, ^, parentheses, Enter (for =), Backspace, and Escape (for AC) all work directly from your keyboard.
What's the difference between the DEG and RAD modes?
It changes how sin, cos, and tan interpret their input — DEG mode expects degrees (like 90 for a right angle), while RAD mode expects radians (like π/2 for a right angle). Most everyday and classroom use is in DEG mode.
Why do sin, cos, tan, log, ln, and √ automatically add a parenthesis?
Those are function keys, not operators — they need an argument to operate on, so the calculator opens the parenthesis for you and waits for you to type or tap the value to evaluate, then close it with ).