High School Student

Calculate sine of any angle in degrees or radians instantly. Supports negative angles and values over 360°. Ideal for trigonometry, physics, and engineering.

Solve triangles with the law of sines for AAS, ASA, and SSA cases. Handles the ambiguous SSA case automatically. Get all sides and angles.

Solve any triangle using the law of cosines. Find a missing side (SAS) or a missing angle (SSS) instantly with formula verification.

Log calculator for common, natural, binary, and custom-base logarithms. Get instant results and clear examples for any positive input.

Natural log calculator that computes ln(x) for any positive number. See the result, symbolic equation, and formula side by side — free and instant.

Projectile motion calculator for flight time, trajectory range, maximum height, and impact speed from launch conditions, with instant results.

SUVAT calculator solves displacement, initial and final velocity, acceleration, and time from any three known values for instant kinematics answers.

Free fall calculator finds fall time and impact velocity from height, initial speed, and gravity for instant kinematics results.

Kinetic energy calculator finds motion energy, mass, or velocity from the classical KE formula in SI units with clear, instant results.

Ohm's Law calculator: enter any two of voltage, current, resistance, or power to instantly solve the rest using V=IR and P=VI for circuit design.

pH calculator for acids, bases, and buffer solutions. Find pH, pOH, [H+], and [OH-] with Henderson-Hasselbalch steps in seconds.

Standard deviation calculator for sample and population data. Find standard deviation, variance, mean, sum, and range from a list of numbers instantly.

Permutation calculator for nPr arrangements with or without repetition. Enter n and r to count ordered selections with clear formulas instantly.

Free nCr nPr calculator: enter n and r to compute combinations and permutations instantly for probability, lottery, and combinatorics.

High school GPA calculator finds weighted and unweighted averages from grade points, credits, honors, and AP classes for clear academic planning.

Calculate your final course grade from current performance and final exam score using weighted averages. Plan your exam strategy to hit your target grade.

Calculate your ACT composite, ELA, and STEM subscores from English, Math, Reading, Science, and Writing scores. See your approximate national percentile.