Scientific Calculator
Trig, logs, powers, roots, factorials and memory, in degrees or radians.
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How to use this calculator
Type or tap your calculation. Switch between degrees and radians with the Deg/Rad key. The answer updates as you type, and = saves it to your history. Ans inserts your last answer, and M+, M−, MR and MC work with the memory.
How it's calculated
sin, cos and tan use degrees or radians, and sin⁻¹, cos⁻¹ and tan⁻¹ give the angle back. ln is the natural logarithm (base e) and log is base 10. xʸ is a power, √ is a square root, and n! is the factorial of a whole number up to 400. Whole-number sums and powers are exact; other results are shown to 12 significant digits.
Worked example
In degrees, sin(30) = 0.5. √(16) × 2^3 = 32. 5! = 120. log(1000) = 3.
Frequently asked questions
How do I switch between degrees and radians?
Tap the Deg/Rad key. It starts in degrees, and Phademy remembers your choice.
What does Ans do?
Ans inserts the last answer you saved with =, so you can use it in the next calculation.
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Last updated October 2026. Results are for learning and guidance; always check important work. Calculations run in your browser and are not stored.