Free calculators for science, travel, students, health, education, weather, math, and business. Includes graphing calculators and measurement conversions.

Features calcutors for arithmetic functions, scientific computations, binary conversions, areas, finanical interest, prime numbers, recurring fractions, factoring, matrices, HEX color converter, date and day calculations, as well as for measuring bandwidth.

An extensive collection of calculators for the sciences, business and everyday measurements. Organized by subject area.

Online calculators for a variety of conversions and calculations.

Includes tools to solve equations like for velocity, density, financial, geometry, algebra, calculus, astronomy, chemistry, physics and webpage color coders. Also, has trivia fact pages, such as state demographics and presidents.

Performs basic math operations, as well as square root and percentages. Includes memory save and recall.

Features converters and calculators for math, physics, atmospheric science, volume, blood alcohol levels, calendar, physics, and finance.

Computes basic operations, 1/z, pi, exponent, log, trig, and polygamma functions. Includes memory feature.

Database of conversion factors and a calculator.

A collection of volumetric calculators for a variety of shapes. Including cylinder sphere barrel pyramid and dome.