Calculators
Scientific Calculator
Scientific Calculator is part of Toolspire and is ready as soon as this page loads. Type or tap a whole expression and see the answer as you go — sin, cos, tan, logs, powers, roots, factorials, nCr and more, with DEG/RAD modes, memory and a history you can reuse.
On this page
What you can do here
See it as you type
The result updates live, and the expression stays on screen so you can fix a typo instead of starting again.
Keyboard and touch
Tap the keys on a phone, or type on a computer — sqrt(2), pi, 5!, 2^10 all work.
Smart percent
200 + 10% gives 220 and 200 × 10% gives 20, the way you expect.
Natural writing
Write 2π, 3(4+5) or 2sin(30) without a multiplication sign; a missing closing bracket is added for you.
Fractions
Decimal answers that are simple fractions are also shown as p/q.
History and memory
Reuse earlier results, and keep a running total in memory. They are saved on this device.
The sequence
How to use the scientific calculator
- 1
Pick the angle unit
Choose DEG for degrees or RAD for radians before using sin, cos or tan.
- 2
Enter the expression
Tap the keys or type — for example sin(30) + 5². Use 2nd for inverse functions such as sin⁻¹ and hyp for sinh, cosh and tanh.
- 3
Press =
The answer appears below the expression and is stored as Ans.
- 4
Carry on
Press an operator to continue from the answer, or pick an earlier calculation from the history.
Worth knowing
- Scientific Calculator on Toolspire: evaluates whole expressions with the correct order of operations and brackets — for example
2sin(30) + √(16+9) × 3²— and shows the answer as you type. - Trigonometry in degrees, radians or gradians, with inverse and hyperbolic functions; exact at the special angles (sin 180° = 0, cos 90° = 0, tan 45° = 1).
- Logs (log, ln, log₂, any base), powers and roots, factorial, nCr and nPr, mod, absolute value, gcd, lcm, π, e and random numbers.
- Answers show up to 12 significant digits, as a fraction when one fits (0.75 = 3/4), in fixed, scientific or engineering notation, with international or Indian digit grouping.
- Memory keys (MS, MR, M+, M−, MC), an Ans key and a history of your last 50 calculations that you can edit or reuse.
- Explains mistakes in plain words — “Can’t divide by zero”, “A ) is missing here” — and marks where. Everything runs in this tab.
Keys and what to type
| To calculate | Enter | Result |
|---|---|---|
| Square root | √(144) | 12 |
| Any root | root(32, 5) | 2 |
| Power | 2^10 | 1024 |
| Sine in degrees | sin(30) | 0.5 |
| Inverse tangent | tan⁻¹(1) | 45 |
| Log to any base | log(8, 2) | 3 |
| Combinations | 5C2 | 10 |
| Percent increase | 200 + 10% | 220 |
| Scientific notation | 6.02E23 × 2 | 1.204 × 10²⁴ |
Order of operations
The calculator follows the standard order: brackets first, then functions and factorials, powers (right to left, so 2^3^2 = 2^9), multiplication and division from left to right, and finally addition and subtraction. A minus sign in front applies after powers, so −2² = −4 while (−2)² = 4.
Multiplication written without a sign (2π, 3(4+5)) has the same priority as ×, so 1 ÷ 2π means (1 ÷ 2) × π. Add brackets — 1 ÷ (2π) — when you mean the other.
FAQ
Questions about Scientific Calculator
Where does Scientific Calculator run?
Why does sin(30) give −0.988 instead of 0.5?
How do I calculate sin⁻¹, cos⁻¹ or tan⁻¹?
What is the difference between log and ln?
How does the % key work?
How accurate is it?
Is my history saved?
Keep going
Related tools
Last updated Report a problem or suggest a feature