Online scientific calculator
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Type a calculation or tap the keys, then press = or Enter. The calculator follows the order of operations, works in degrees or radians, and keeps a history of your calculations: click an old calculation to edit it, or an answer to use it again. Ans is your last answer. A preview shows the result before you press equals, so you can spot a typing slip straight away.
What it can do
| Key | What it does | Example |
|---|---|---|
| sin, cos, tan | Trig functions | sin(30) = 0.5 in degrees |
| sin⁻¹, cos⁻¹, tan⁻¹ | Inverse trig: find an angle | sin⁻¹(0.5) = 30 |
| x², xʸ, √, ∛ | Powers and roots | 2^10 = 1024 |
| log, ln, eˣ | Logs base 10 and base e | log(1000) = 3 |
| x! | Factorial | 5! = 120 |
| ×10ˣ | Standard form | 3.2×10^5 = 320000 |
| % | Divide by 100 | 15% × 80 = 12 |
You can also type it all: 3sin(30) + 2^5 works, and so does 2pi or (1+2)(3+4), because a number next to a bracket or a letter means multiply.
Degrees or radians?
For GCSE and IGCSE maths and most school physics, angles are in degrees, which is the default. Radians are used in A level maths and beyond. If sin(30) doesn't give 0.5, you're in radians: tap the DEG/RAD button. The calculator remembers your choice on this device.
Order of operations
The calculator follows the same rules as your exam calculator: brackets first, then powers and roots, then multiplication and division, then addition and subtraction. So 3 + 4 × 2 = 11, not 14. When in doubt, add brackets: they never hurt. Our order of operations calculator shows each step if you want to see why.
Using a calculator well in exams
- Write down what you type. If the answer looks wrong, you can find the slip, and you can still get method marks.
- Don't round too early. Use the full answer (Ans) in the next step and round only at the end.
- Estimate first. A quick estimate tells you whether 3,240 or 32.4 is sensible.
- Know your own calculator. This one is for homework and practice; in the exam you'll use an approved handheld calculator, so practise with that too.
Negative numbers and powers
Use the (−) key or type a minus sign. Be careful with powers of negatives: −3² means −(3²) = −9, while (−3)² = 9. This is a common exam trap, and the calculator follows the maths convention, so put negative numbers in brackets when you square them.
Frequently asked questions
Why does sin(30) give −0.988?
The calculator is in radians. Tap DEG/RAD to switch to degrees, and sin(30) gives 0.5.
How do I type standard form?
Use the ×10ˣ key, or type it: 3.2*10^5 or 3.2×10^-4.
Can I use this in an exam?
No. Exams need an approved handheld calculator. This one is for homework, revision and checking your working.
How do I use my previous answer?
Tap Ans, or click any answer in the history. If you start with an operation like + or ×, the calculator continues from your last answer.
Is anything I type sent to a server?
No. Everything runs in your browser, and nothing you type is sent to TutorAura.
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