All Tools · Page 13
Find a tool by name, topic, or what you need to calculate.
Browse by use
A tool can belong to several categories. All tools lists each calculator once.
Computing
Construction
Cooking
Geometry
Arc Length and Sector Area Calculator
Learning & Education · Construction & DIY · Design & DrawingCalculate a circular arc, sector area and chord from radius and central angle. Mix angle and length units and view a sector diagram plus unit equivalents.
Open calculator ↗Slope Calculator
Construction & DIY · Design & Drawing · Learning & Education · Sports & FitnessFind percent grade and angle from rise and horizontal run, or solve a missing rise or run. Mix length units and inspect a labelled elevation diagram.
Open calculator ↗Mathematics
Prime Factorization Calculator
Learning & Education · IT & CommunicationFactor a positive integer up to one trillion. See prime powers, primality, divisor count, the exact divisor sum and a sorted divisor table.
Open calculator ↗Complex Number Calculator
Learning & Education · Science & LabAdd, subtract, multiply or divide two complex numbers. Enter real and imaginary parts separately, then inspect magnitude, argument and an equal-scale complex-plane diagram.
Open calculator ↗Vector Calculator
Learning & Education · Science & Lab · Design & DrawingEnter two three-component vectors to calculate their sum, difference, dot product, cross product, magnitudes and angle, with an XY-projection diagram.
Open calculator ↗Work Rate Calculator
Time & Planning · Learning & Education · Science & LabCalculate how long two constant-rate workers, machines or pipes take together. Include an opposing drain and an already-completed fraction, with a progress graph.
Open calculator ↗GCD and LCM Calculator
Learning & EducationFind the exact greatest common divisor and least common multiple of 2–20 integers. Inspect progressive reductions, divisibility checks and Euclidean division steps.
Open calculator ↗Weighted Average Calculator
Learning & Education · Money Management · Science & LabEnter paired values and weights to calculate a weighted mean. Inspect normalized weight shares, each contribution and a comparison with the unweighted average.
Open calculator ↗Linear Interpolation Calculator
Learning & Education · Science & Lab · Design & DrawingEnter two known points and a target x or y. Calculate the other coordinate, view the straight-line model and clearly distinguish interpolation from extrapolation.
Open calculator ↗Sequence Calculator
Learning & EducationFind the nth term and sum of an arithmetic or geometric sequence. Inspect terms, running totals, a term graph and a convergent geometric sum where applicable.
Open calculator ↗Permutation and Combination Calculator
Learning & EducationCount ordered or unordered selections, with or without repetition. Read the exact integer result, compare all four cases and list examples for small problems.
Open calculator ↗Physics
Series and Parallel Resistor Calculator
Learning & Education · Science & LabFind the equivalent resistance of 2–20 ideal resistors in series or parallel. Enter a DC voltage to calculate current, voltage drop and power for every resistor.
Open calculator ↗Kinetic Energy Calculator
Learning & Education · Science & Lab · Automotive · Sports & FitnessFind translational kinetic energy, mass or speed from the other two values. Choose explicit units, compare energy equivalents and see how energy changes with speed.
Open calculator ↗Pressure Converter
Learning & Education · Science & Lab · Construction & DIY · AutomotiveConvert pressure across SI and other common units. Distinguish absolute and gauge readings using a reference pressure you enter, and compare both in a unit table.
Open calculator ↗Temperature Converter
Learning & Education · Science & Lab · Cooking & Kitchen · TravelConvert Celsius, Fahrenheit, kelvin and Rankine. Distinguish actual temperatures from temperature changes, and compare all four scales in a table.
Open calculator ↗Shopping
Sports
Time
Time Calculator
Time & Planning · Learning & Education · Sports & Fitness · TravelAdd or subtract up to 100 durations. Use signed clock durations or decimal hours, minutes or seconds, then compare the exact total and running sums.
Open calculator ↗Date Difference Calculator
Time & Planning · Learning & Education · TravelCount calendar days between two Gregorian dates, optionally including both endpoints. View the direction, week breakdown and Monday–Friday versus weekend counts.
Open calculator ↗