Scientific
calculator
A proper scientific calculator, roots, powers, logs, trigonometry and constants, that evaluates as you build the expression. Switch between degrees and radians with a tap.
Doing it by hand too?
A few solid picks. As an Amazon Associate, Calculate.to earns from qualifying purchases, at no extra cost to you.
Casio fx-83GTCW+
The UK classroom-standard scientific calculator (also in pink), allowed in most UK exams.
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Helix Oxford Scientific
240-function scientific calculator for KS3–KS4 maths, with hard cover. Exam-friendly, plastic-free packaging.
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OSALO Desktop Calculator
Extra-large 12-digit LCD, giant buttons, solar + battery, the classic office desk workhorse.
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ROATEE Construction Calc
Feet-inch-fraction engineering calculator for carpenters, framers and contractors on site.
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A calculator that shows its working
This is a full scientific calculator: alongside the digits and operators, it has roots, powers, logarithms, trigonometry and the constants π and e. The expression you're building stays visible on the tape above the result, and the answer updates live as you go, so you can see exactly what's being evaluated.
What the function keys do
- √ and x², square root and squaring; xʸ raises to any power
- log and ln, base-10 and natural logarithm
- sin, cos, tan, trigonometry, in degrees or radians
- π and e, the two most useful constants
- ( ), parentheses to control the order of operations
Degrees or radians
Trigonometry needs to know how you're measuring angles. The DEG / RAD switch at the top of the keypad flips between the two, degrees for everyday angles (a right angle is 90), radians for maths where a full turn is 2π. Set it before reading a trig result.
powers first, then × and ÷, then + and −.
Use parentheses to group anything you want
evaluated together, for example (2 + 3) × 4 = 20.
Keyboard friendly
You can type straight from a physical keyboard: digits and operators go in as you press them, Enter evaluates, Backspace deletes, and Escape clears. For fraction arithmetic specifically, the fraction calculator keeps answers in exact fractional form instead of decimals.
Scientific FAQ
It handles the four basic operations plus square roots, squaring, arbitrary powers, base-10 and natural logarithms, sine, cosine and tangent, the constants π and e, and parentheses for grouping.
Use the DEG / RAD toggle at the top of the keypad. In degrees a right angle is 90; in radians a full circle is 2π. The trig functions use whichever mode is selected.
Yes. It applies standard precedence, powers first, then multiplication and division, then addition and subtraction, and you can override the order with parentheses.
Yes. Type digits and operators directly, press Enter or = to evaluate, Backspace to delete the last entry, and Escape to clear everything.
Use the xʸ key, or type the caret. For example, 2 to the power of 10 is entered as 2^10 and gives 1024. The x² key squares in one tap.