Math & Scientific calculators
Work through arithmetic, algebra, geometry, statistics, physics, and engineering quantities.
Tool map
What are you trying to work out?
Arithmetic & algebra
17Numbers, fractions, percentages, sequences, and equations.
Average Percentage Calculator · Binary to Hexadecimal Calculator · Cross Product Calculator
Geometry
2Shapes, angles, coordinates, area, and volume.
Circle Calculator · Half Angle Calculator
Statistics & probability
1Distributions, samples, probability, and descriptive statistics.
Statistics Calculator
Physics & engineering
4Motion, forces, electricity, waves, and physical properties.
Newton to Joules Calculator · Ohm's Law Calculator · PPI Calculator
More math & science
4Additional mathematical and scientific tools.
Color Format Converter Calculator · Long Division Calculator · Matrix Calculator
A useful place to start
Pick the topic that matches the quantity or operation in your problem. Keep units consistent before using a scientific formula.
Percentage Calculator
Calculate percent of a number, what percent one value is of another, and percent change with clear formulas, examples, domains, and interpretation.
Fraction Calculator
Add, subtract, multiply, and divide fractions with simplified results, mixed numbers, decimal values, denominator rules, and worked examples.
Circle Calculator
Find a circle's radius, diameter, circumference, and area from any one positive measurement, with formulas, units, inverse cases, and checked arithmetic.
Average Percentage Calculator
Find the simple average of two to five percentages, with guidance on when equal-weight averaging is valid and when weighted totals are required.
Binary to Hexadecimal Calculator
Convert binary numbers to hexadecimal and hexadecimal digits to binary while understanding four-bit grouping, base 2, base 16, padding, and width limits.
Color Format Converter Calculator
Convert screen colors between RGB, HEX, and HSL while understanding channel ranges, hexadecimal encoding, hue, saturation, lightness, and CSS-ready output.
Cross Product Calculator
Calculate the 3D cross product vector, components, and magnitude, with determinant derivation, right-hand-rule interpretation, units, and edge cases.
Decibel Calculator
Convert decibels to power or amplitude ratios, convert ratios to dB, and combine two sound levels with logarithmic formulas and safety context.