How does the percent (%) button work on this calculator?

If you enter a single number followed by %, it divides that number by 100 (so 50% becomes 0.5). If you enter two numbers separated by %, such as 20%150, it calculates 20% of 150, which equals 30.

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Q: Does this calculator support scientific functions like sin, cos, and tan?

Yes. This calculator includes sin, cos, and tan buttons that work in degrees, not radians. For example, entering sin(30) returns 0.5, matching the standard degree-based trigonometric value.

Q: What does the x² button calculate?

The x² button squares the number currently entered. For example, 7 followed by x² returns 49.

Q: Is this calculator free and does it require sign-up?

Yes, the calculator is completely free with no registration or sign-up required. Calculations run directly in your browser.

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Fitness & Health

$Math Calculators$

Math Calculators

How This Online Calculator Works

This is a browser-based online calculator that handles everyday arithmetic (addition, subtraction, multiplication, division) plus a set of scientific functions: square root, square, sine, cosine, tangent, and percentage. Everything runs instantly in your browser using JavaScript — nothing you type is sent to a server or stored anywhere, so it works even if your connection is slow.

Using the basic operations

Tap the number and operator buttons the same way you would on a physical calculator, then press = to see the result. For example, entering 45 + 30 and pressing = returns 75. The C button clears the whole entry, and the backspace button (⌫) removes the last character if you make a typing mistake.

Using the scientific functions

Square root (√): Enter √ followed by a number, e.g. √81 → 9.

Square (x²): Enter a number followed by x², e.g. 12 x² → 144.

Trigonometric functions: sin, cos, and tan work in degrees, not radians. Entering sin(30) returns 0.5, matching the standard degree-based sine table used in most school-level trigonometry.

Percentage (%): Enter 20%150 to calculate 20% of 150, which returns 30. Enter a single number followed by % (e.g. 50%) to convert it directly to a decimal (0.5).

When you'd use this vs. a specialized calculator

This tool is built for quick, general-purpose math — homework checks, everyday arithmetic, and basic trigonometry. For calculations tied to money or health, our specialized tools apply the correct formula automatically and explain the result in context. A Loan Calculator factors in interest rate and term length; a BMI Calculator applies the standard height-to-weight formula and tells you which range you fall into. Use this calculator when you just need the raw math done fast.

Frequently Asked Questions

Does this calculator support scientific functions like sin, cos, and tan?

Yes. The sin, cos, and tan buttons work in degrees, not radians. For example, entering sin(30) returns 0.5, matching the standard degree-based trigonometric value.

How does the percent (%) button work?

Enter a single number followed by % to divide it by 100 (50% becomes 0.5). Enter two numbers separated by %, such as 20%150, to calculate 20% of 150, which equals 30.

What does the x² button calculate?

It squares the number currently entered. For example, 7 followed by x² returns 49.

Is this calculator free, and does it require sign-up?

Yes, it's completely free with no registration required. Calculations run directly in your browser.

Does this calculator store the numbers I enter?

No. All calculations happen locally in your browser using JavaScript — nothing you type is sent to or stored on a server.

Need a calculator built for a specific task instead? These are our most-used specialized tools:

🧮 BMI Calculator 💰 Loan Calculator 📝 Word Counter 🎂 Age Calculator

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