Tools & Calculators

Trigonometry, logarithms, powers, roots, memory, degree/radian modes, and calculation history.

Percentage of a number, percentage increase/decrease, change, and percentage difference.

Add, subtract, multiply, and divide fractions with step-by-step working and simplified results.

Decimal arithmetic with configurable rounding and precision settings.

Simplify ratios, compare ratios, and calculate missing values in a proportion.

Solve direct proportions with cross-multiplication steps shown.

Calculate the arithmetic mean of a list of numbers with a clear explanation.

Find the least common multiple and greatest common factor of integers.

Powers including negative and fractional exponents with domain validation.

Square roots and supported nth roots with proper domain validation.

Solve ax² + bx + c = 0 with discriminant, real/complex roots, and worked steps.

Solve linear equations and identify invalid or non-unique cases.

Solve 2×2 linear systems using Cramer's rule; detect inconsistent systems.

Slope from two points, vertical-line detection, and line equation.

Coordinate distance using the distance formula with worked steps.

Find the midpoint coordinates of a line segment.

SSS, SAS, area via Heron's formula, triangle inequality validation.

Common 2D shapes with shape-specific inputs and formulas.

Radius, diameter, circumference, and area from any one known value.

Find a missing side of a right triangle and reject impossible inputs.

Configurable grading scales, course grades, and credit hours.

Calculate cumulative GPA using previous credits and GPA values.

Course grade from current performance and final-exam results.

Custom assessment categories and weights, even if they don't total 100%.

Calculate percentage from obtained and maximum marks.

Minimum score needed to reach a target grade, including impossible targets.

Letter ↔ percentage ↔ GPA with visible assumptions.

Build a study schedule from your subjects, available hours, and deadlines.

Attendance %, absences, and classes needed to reach a target percentage.

Model future course grades and credit hours to plan your semester GPA.

Organized formula selection for mechanics, energy, density, pressure, and electricity.

Calculate force using F = ma with proper SI units.

Calculate any one quantity when the other two are known.

Calculate acceleration from change in velocity over time.

Calculate density, mass, or volume using consistent units.

Calculate pressure, force, or area with unit conversion support.

Mechanical work under clearly stated force and displacement assumptions.

Power using mechanical (W/t) or electrical (V·I) relationships.

Calculate kinetic energy from mass and speed using KE = ½mv².

Calculate voltage, current, or resistance using V = I × R.

Length, mass, temperature, area, volume, speed, and time units.

Convert metric, imperial, and US customary length units.

Correct conversion factors and explicit unit labels.

Convert between Celsius, Fahrenheit, and Kelvin with absolute-zero validation.

Metric, imperial, and US customary area units.

Liters, gallons, cubic units, and cooking measures.

Convert between m/s, km/h, mph, ft/s, and knots.

Elapsed time, durations, and supported date/time differences.

All three measures of central tendency with no-unique-mode handling.

Population or sample standard deviation per your selection.