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Scientific calculator
Type a calculation or use the keys: trig in degrees or radians, logs, powers and roots, factorials, π and e. The answer updates as you type, and your history stays on this device.
Answer: 0
Type with your keyboard or press the keys. Enter gives the answer, Escape clears.
History
Your calculations will appear here.
What you type stays on this device. Nothing is uploaded.
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How to use the scientific calculator
- Type a calculation with your keyboard, such as 2 sin 30 + √16, or press the keys. The answer appears as you type.
- Press = or Enter to finish. The calculation goes into the history, and Ans holds the answer for the next one.
- Choose degrees or radians for trig, and use M+, M− and MR to keep a number in memory.
Questions
Should I use degrees or radians?
Use degrees for angles you measure with a protractor, where sin 30 = 0.5. Use radians in calculus and physics, where sin(π/6) = 0.5. The switch above the keys sets it for every trig key, inverse trig answers come back in the same unit, and the calculator remembers your choice.
How does it read 1/2π or 6/2(1+2)?
Writing things side by side, like 2π or 2(1+2), multiplies before × and ÷, as on most scientific calculators. So 1/2π is 1 ÷ (2π) and 6/2(1+2) is 1. Whenever a line could be read two ways, the calculator shows how it read it under the answer. Add brackets to choose: (1/2)π.
What can I type with the keyboard?
Write it the way you would on paper: 2^10, sqrt(2) or √2, sin 30, asin(0.5), 5!, 15% and 3E8 for 3 × 10⁸. Brackets left open at the end are closed for you. Press Enter for the answer and Escape to clear. root(27, 3) is a cube root and log(8, 2) is a logarithm in base 2.
What do Ans, M+, M− and MR do?
Ans is the last answer. Start with an operator after an answer, such as × 2, and Ans is filled in for you. M+ adds the current answer to the memory and M− takes it away; MR puts the memory, M, into your calculation, and MC clears it.
How accurate are the answers?
The calculator works with about 15 significant digits and shows up to 12, so 0.1 + 0.2 shows 0.3. Very large and very small answers are written as × 10ⁿ. Trig at common angles is exact: sin 30° is 0.5 and tan 90° is undefined.
Is my history saved or sent anywhere?
Calculations run in your browser, and nothing is sent. The history, the memory and the degrees or radians choice are kept in this browser only. Clear history removes the list.