15 calculators
A free online electrical calculator that converts amps to watts using the P = I ร V formula, covering DC, single-phase, and three-phase circuits, with breaker sizing, appliance wattage, and regional voltage references.
Convert instantly between binary, decimal, octal, hexadecimal and custom number bases with this free, accurate Base or Radix Converter.
An interactive calculator that converts binary (base 2) numbers into decimal (base 10) instantly, with full explanations of place value, the doubling method, byte conversion, binary fractions, and signed (two's complement) numbers.
A free online tool that instantly converts base-2 binary numbers to base-16 hexadecimal, with the group-of-four method, a nibble reference table, fractional and negative number conversion, and reverse hex-to-binary support.
A free online tool that instantly converts base-2 binary numbers to base-8 octal using the group-of-three method, with a full reference table, fractional conversion, and Unix file permission context.
A free online tool that estimates engine horsepower from displacement in cubic centimeters (CC), with ratios broken down by motorcycle, small engine, car, and diesel type, plus a full reference chart.
A free online math tool that converts base-10 decimal numbers into base-16 hexadecimal values instantly, with step-by-step division methods, fractional and negative number conversion, and a full reference chart.
A free online math tool that calculates a circle's circumference from its diameter (or diameter from circumference) using C = ฯd, with worked examples, a conversion chart, and real-world uses like pipe wrap and Earth's circumference.
A free online tool that converts decimal numbers into IEEE 754 binary floating point format (16-bit, 32-bit, or 64-bit), with sign, exponent, and mantissa breakdown, and reverse hex-to-decimal decoding.
A fraction to decimal conversion calculator is a simple tool that turns a numerator and denominator, or a mixed number, into its equivalent decimal value in seconds.
A free online tool that converts gigabytes to megabytes using both decimal (ร1,000) and binary (ร1,024) formulas, with a full reference chart and explanations for storage, RAM, and file size use cases.
A free online chemistry tool that converts mass in grams to moles (and back) using molar mass, with step-by-step formulas, worked examples for compounds and hydrates, and guidance on common calculation mistakes.
A free online tool that converts numbers between standard decimal form and scientific notation instantly, with e notation support, arithmetic rules, and normalization guidance for improper coefficients.
A tire size conversion calculator takes the code printed on a tire's sidewall, something like 225/65R17, and turns it into measurements you can actual...
A free online engineering tool that converts torque between Newton-meters, foot-pounds, inch-pounds, and kilogram-force units instantly, with formulas, a conversion chart, and real-world specs for lug nuts and torque wrenches.