One place for every calculator.

Add, subtract, multiply, divide, parentheses, %.

X% of Y, X is what % of Y, % change.

Split bills and compute tip amounts.

Sale price after % discount.

Trig, log, exp, powers, roots, factorial, and more.

Roots of ax² + bx + c.

Greatest common divisor and least common multiple.

Rectangle, square, triangle, circle.

Exact age from date of birth.

Days between two dates.

Body Mass Index with WHO categories.

Basal metabolic rate (Mifflin–St Jeor).

Loan EMI with interest breakdown.

P × R × T / 100.

A = P(1 + r/n)^(nt).

Future value of monthly investments.

Add or reverse a tax percentage.

Flat-rate income tax.

Margin, markup and profit.

m, km, mi, ft, in, and more.

kg, lb, oz, ton.

L, mL, gallons, cups.

m/s, km/h, mph, knots.

Celsius, Fahrenheit, Kelvin.

Solve for V, I, or R.

Newton's second law.

KE = ½ m v².

Range, height and time of flight.

moles / volume.

PV = nRT, solve any variable.

pH from hydrogen-ion concentration.

Binary / octal / decimal / hex.

Secure random passwords.