60 tools in this category
Calculators for everyday work.
Practical calculations for quick everyday answers. Everything here works without an account.
Aspect Ratio Calculator
Reduce width and height to a ratio and see its decimal value and orientation.
Fuel Cost Calculator
Estimate the fuel cost for a one-way trip using distance, efficiency, and fuel price.
Dew Point Calculator
Estimate dew point from air temperature and relative humidity locally in your browser.
Resistor Color Code Calculator
Decode 4-, 5-, and 6-band resistor color codes into resistance, tolerance, and temperature coefficient values locally.
Standard Deviation Calculator
Calculate population or sample standard deviation for a numeric dataset locally in your browser.
Percentage Difference Calculator
Calculate the percentage difference between two values locally in your browser.
Percentage Increase Calculator
Calculate the percentage increase or decrease from an original value to a new value locally.
Percentage Change Calculator
Calculate the percentage change from an original value to a new value locally in your browser.
Average Calculator
Calculate the mean, median, mode, minimum, maximum, and range for a numeric dataset locally in your browser.
GCD and LCM Calculator
Calculate the greatest common divisor and least common multiple of two whole numbers locally in your browser.
Prime Number Checker
Check whether a whole number is prime and see its smallest factor locally in your browser.
Fraction Simplifier
Reduce a fraction to lowest terms and see its decimal value locally in your browser.
Factorial Calculator
Calculate the exact factorial of a whole number from 0 to 200 locally in your browser.
Square Root Calculator
Calculate the square root of a number from 0 to 1000000000000000 locally in your browser.
Cube Root Calculator
Calculate the cube root of a number from -1000000000000000 to 1000000000000000 locally in your browser.
Modulo Calculator
Calculate the remainder and quotient of two whole numbers locally in your browser.
Logarithm Calculator
Calculate the logarithm of a positive number for any valid base locally in your browser.
Random Number Generator
Generate secure random whole numbers in any range locally in your browser.
Quadratic Equation Solver
Solve quadratic equations ax squared plus bx plus c equals 0 locally in your browser.
Circle Calculator
Calculate circle area, circumference, and diameter from a radius locally in your browser.
Triangle Calculator
Calculate triangle perimeter and area from three side lengths locally in your browser.
Rectangle Calculator
Calculate rectangle area, perimeter, and diagonal from length and width locally in your browser.
Square Calculator
Calculate square area, perimeter, and diagonal from a side length locally in your browser.
Cube Calculator
Calculate cube volume, surface area, and diagonals from a side length locally in your browser.
Sphere Calculator
Calculate sphere volume, surface area, diameter, and great-circle circumference from a radius locally in your browser.
Cylinder Calculator
Calculate cylinder volume, surface area, base area, and lateral area from radius and height locally in your browser.
Cone Calculator
Calculate cone volume, surface area, base area, lateral area, and slant height from radius and height locally in your browser.
Concrete Calculator
Estimate concrete volume, cubic yards, and premix bags for slabs and round columns locally in your browser.
Pyramid Calculator
Calculate square pyramid volume, surface area, base area, lateral area, and slant height from base length and height locally in your browser.
Cuboid Calculator
Calculate cuboid volume, surface area, and space diagonal from length, width, and height locally in your browser.
Trapezoid Calculator
Calculate trapezoid area, median, and shape from the two bases and height locally in your browser.
Ellipse Calculator
Calculate ellipse area, approximate circumference, and shape from the two semi-axes locally in your browser.
Parallelogram Calculator
Calculate parallelogram area, perimeter, and shape from the base, side, and height locally in your browser.
Rhombus Calculator
Calculate rhombus area, side, perimeter, and shape from the two diagonals locally in your browser.
Hemisphere Calculator
Calculate hemisphere volume, surface area, diameter, and base circumference from a radius locally in your browser.
Torus Calculator
Calculate torus volume and surface area from the major and tube radii locally in your browser.
Hexagon Calculator
Calculate regular hexagon area, perimeter, apothem, and diagonals from a side length locally in your browser.
Pentagon Calculator
Calculate regular pentagon area, perimeter, apothem, and diagonal from a side length locally in your browser.
Octagon Calculator
Calculate regular octagon area, perimeter, apothem, and diagonals from a side length locally in your browser.
Heptagon Calculator
Calculate regular heptagon area, perimeter, apothem, and circumradius from a side length locally in your browser.
Nonagon Calculator
Calculate regular nonagon area, perimeter, apothem, and circumradius from a side length locally in your browser.
Decagon Calculator
Calculate regular decagon area, perimeter, apothem, and circumradius from a side length locally in your browser.
Undecagon Calculator
Calculate regular undecagon area, perimeter, apothem, and circumradius from a side length locally in your browser.
Dodecagon Calculator
Calculate regular dodecagon area, perimeter, apothem, and circumradius from a side length locally in your browser.
Slope Calculator
Calculate the slope, y-intercept, line equation, and distance between two points locally in your browser.
AOV Calculator
Calculate average order value (AOV) from total revenue and order count locally in your browser.
Electricity Cost Calculator
Estimate electricity energy use and cost from device wattage, daily hours, days, and rate locally in your browser.
Pythagorean Theorem Calculator
Find the missing side of a right triangle from two known sides locally in your browser.
Confidence Interval Calculator
Calculate a normal-approximation confidence interval from a sample mean, standard deviation, and sample size locally in your browser.
Correlation Coefficient Calculator
Calculate the Pearson correlation coefficient (r) for two paired datasets locally in your browser.
Variance Calculator
Calculate population or sample variance for a numeric dataset locally in your browser.
Final Grade Calculator
Calculate the final exam score you need from your current grade, final weight, and desired overall grade locally in your browser.
Flight Emissions Calculator
Estimate flight CO2e emissions from distance, cabin class, trip type, and passengers locally in your browser.
Cat Age Calculator
Convert a cat age in years and months to human years with a life stage locally in your browser.
GPA Calculator
Calculate a credit-weighted GPA from course letter grades and credit hours on a 4.0 scale locally in your browser.
Tile Calculator
Estimate floor tiles, waste allowance, and boxes needed from floor and tile sizes locally in your browser.