Is CalcPro free to use?

Yes, CalcPro is completely free to use. There are no subscriptions, sign-ups, or hidden fees. All calculator features including scientific functions, percentage calculations, tip calculator, and BMI calculator are available at no cost.

Does CalcPro work on mobile devices?

Yes, CalcPro is fully responsive and optimized for mobile devices. The calculator interface adapts to any screen size, with touch-friendly buttons sized for comfortable use on phones and tablets.

Can I use my keyboard with CalcPro?

Yes, CalcPro supports full keyboard input. You can type numbers, use +, -, *, / for operators, Enter or = for equals, Escape to clear, and Backspace to delete. This makes rapid calculations easy on desktop.

What scientific functions does CalcPro support?

CalcPro supports a wide range of scientific functions including trigonometric functions (sin, cos, tan and their inverses), logarithms (log base 10 and natural log), square root, exponents, factorial, absolute value, constants like π and e, and more.

How do I clear my calculation history?

You can clear your calculation history by clicking the trash icon at the top of the History panel. This removes all saved calculations. Individual calculations cannot be deleted separately, but the entire history is cleared when you click the button.

CalcPro – Free Advanced Scientific Calculator Online

Percentage Calculator

What is X% of Y?

% of = —

Percentage Change

From to = —

Increase / Decrease by %

= —

Tip Calculator

Bill Amount ($)

Tip Percentage (%)

Split Between

Tip Amount$0.00

Total$0.00

Per Person$0.00

BMI Calculator

Metric Imperial

Height (cm)

Weight (kg)

Your BMI

—

Enter your details above

1518.5253040

BMI is a general indicator and may not be accurate for athletes, elderly, or pregnant individuals. Consult a healthcare professional for personalized advice.

How to Use CalcPro

Choose your calculator mode — Use the navigation tabs to switch between Standard/Scientific calculator, Percentage, Tip, or BMI calculator.
Enter numbers — Click the on-screen buttons or type on your keyboard. Numbers, operators, and functions are all clickable.
Toggle Scientific mode — Click "Scientific" above the display to reveal advanced functions like sin, cos, log, factorial, and more.
Use memory functions — Store values with M+, recall with MR, subtract with M−, and clear memory with MC.
Review history — All calculations appear in the History panel. Click any entry to restore that result.
Copy results — Click the copy icon next to the display to copy the current result to your clipboard.

Scientific Calculator Functions Explained

Function	Symbol	Description
Sine	sin	Returns the sine of an angle
Cosine	cos	Returns the cosine of an angle
Tangent	tan	Returns the tangent of an angle
Inverse Sine	sin⁻¹	Returns the arcsine (angle whose sine is x)
Inverse Cosine	cos⁻¹	Returns the arccosine
Inverse Tangent	tan⁻¹	Returns the arctangent
Logarithm (Base 10)	log	Returns log base 10 of a number
Natural Log	ln	Returns the natural logarithm (base e)
Square Root	√	Returns the square root of a number
Square	x²	Raises a number to the power of 2
Power	xⁿ	Raises x to the power of n
Pi	π	Inserts the constant π (3.14159…)
Euler's Number	e	Inserts the constant e (2.71828…)
Reciprocal	1/x	Returns 1 divided by x
Absolute Value	\|x\|	Returns the non-negative value of x
Factorial	n!	Returns the product of all positive integers up to n
Exponential	exp	Returns e raised to the power of x
Power of 10	10ˣ	Returns 10 raised to the power of x

Why Use an Online Calculator?

Always accessible — Use it anywhere with an internet connection, on any device.
No installation needed — No app downloads or software installs required.
Full scientific features — Trigonometry, logarithms, exponents, and more — all for free.
Calculation history — Review and restore previous calculations anytime.
Multiple tools in one — Percentage, tip, and BMI calculators built right in.
Keyboard support — Power users can type calculations directly for maximum speed.

History