Rechneronline - Useful Calculators

Calculators, digital tools, for numerous applications, for private, business and school use. This is the English language version of the German Rechneronline. Rechner translates as calculators. Not every German page is translated, but most of them. Not all calculators are listed here, some topics contain much more.

Maths		↑
	Calculations of Geometrical Figures and Solids Calculating with two-dimensional and three-dimensional geometric shapes. Overview of geometric shapes , Circle, Triangle, Quadrilateral, Pentagon, Sphere, Dodecahedron ...		Function Graphs Plot graphs of math functions. Mobile Version, Instructions, Download
	Linear Algebra Matrix calculator for linear equations and for vectors in space. Matrices, Determinants, Equation Systems, Vektors		Golden Ratio Calculates the lengths for the golden ratio. Silver Ratio, Plastic Number, Square Root of Two
	Statistics Calculator Produces statistics on a data set.		Combinatorics Formulas from combinatorics like Binomial Coefficient can be calculated. Factorials, Repetition, Subfactorial
	Digit Sum Finds the cross sum and iterated cross sum from one or more numbers or a whole text. Base-k Digit Sum, Weighted Digit Sum, Digit Product		Data Set Calculator Calculations with a data set of numbers: basic arithmetic operations, powers, logarithms, trigonometric functions. Number Sieve
	Random Numbers Generates random numbers, evenly distributed, left-hand part, right-hand part or distributed bell-shaped. Random Subset		Calculate the Slope Calculates the gradient in degrees and percent, as well as the distances in length and height and the total distance.
	Prime Factor Calculation Find the prime factors of an integer. Find Numbers with Common Divisors		Draw Angles Drawing program for angles of certain sizes. Calculator for: Angle of Incidence and of Reflection, Convert Degrees, Minutes, Seconds, Decimal Degrees, Percent - Degrees, Calculate with Angles, Angular Ratio, Leg Distance, Circular Angles, Solid Angles
	Calculate Logarithm The logarithm of a value on any base can be calculated. Ratio of two Logarithms, Doubling		Pythagoras Calculator Make calculations in the right triangle. Pythagorean Theorem, Pythagorean Theorem Formulas
	Number List Generator Create a list of numbers with any start and end value and increment. Count		Sum und Product Calculate sum Σ and product Π with start and end value. Double Sum, Series, Sequence, Iteration, Recursion, Continued Fraction
	Trigonometric and Hyperbolic Functions Derivative and Integral of Trigonometric and Hyperbolic Functions.		Dimensions: Ratios Calculator for ratios for sizes with multiple dimensions: area (2D), space (3D) and fractals. Multiple Area and Volume, Area, Volume, Parts from Cutting, Rectangular Stack, Margin, Inside and Outside, Divergence
	Fold a Rectangle Calculate and draw the folding of a rectangle. Wrapping Paper		Draw and Calculate a Straight Line Calculator for the angle of inclination of a straight line and the intersection of two straight lines. The lines will be drawn. Intersection of two Straight Lines, Line through Two Points
	Logarithmic Scale Calculator for comparing two values, the size of which has been measured on a logarithmic scale. Decibel, Earthquake, pH-Value, Brightness, Octave, Power of Two		Decimal Places of Irrational Numbers Calculation of up to 2000 decimal places of the transcendent numbers π, e, φ, irrational roots, as well as their multiples. Calculate with Large Numbers, Exponential Function
	Set Theory A calculator for set theory. Two sets of numbers can be cut, merged, subtracted from one another, and sorted.		Contact Sphere - Obstacle Calculator for the point at which a ball on a plane touches an obstacle of a certain height. Fill Level Circle and Sphere
	Draw Chart Diagrams A simple drawing program for diagrams with up to 10 values: pie chart, bar chart and column chart.		Squaring the Circle Calculator for the side length for a square and the radius for a circle when both have the same area. Squaring the Ellipse, Squaring the rectangle, Squaring the Polygon, Cubing the Sphere, Cubing the Ellipsoid, Cubing the Cuboid
	Correlation and Significance Calculator for the correlation coefficient for two characteristics and the significance. Simple Linear Regression Variance and Standard Deviation Normal Distribution		Numerals Calculator Transfer numbers into English numerals, which are numbers written down as words, like one, two, three and much larger ones.
	Rounding Multiple methods of rounding numbers: rounding, rounding up, rounding down, round with 5, round down with 5. Sum Conserving, Absolute Value, Signum, Reciprocal Any Precision Count Decimal Places
Physics & Chemistry		↑
	Math and Physics Formulary Collection of important formulas from the fields of mathematics and physics. Logarithm, Binomial Theorem Least Common Multiple, Greatest Common Divisor, Quadratic Formula Kinetic Energy, Relativity ...		Convert Units of Measurement Convert physical and technical dimensions of all kinds into one another. Area, Energy, Scientific Calculator Memory, Temperature, Rotation Print Units ...
	Chemical Calculators Various chemical calculations. Atomic Masses, Molekular mass, pH-Delution, Ideal Gas Law, Half-life ...		Air Pressure with Barometer Convert the air pressure from different altitudes into one another, e.g. to calibrate a barometer. Humidity, Precipitation, Dew Point, Water pressure
	Astronomy Calculator Converts values for the stars and planets.		Calculator for the Electromagnetic Spectrum Convert wavelength, frequency and energy into each other and display them on a scale. Black Body Radiation, Convert Mass and Energy
	Angular Diameter Calculate the angle of vision or the apparent size of distant objects. Distance to the Horizon | Visual Field | Height Estimation | Shadow Length		Multiply Temperatures Correct calculation with Celsius and Fahrenheit. Temperature Ratio, Weather and Climate, Global Warming by CO₂
	Convert Volume Percent and Mass Percent Calculator for converting volume percentages and mass percentages when the density of the mixed substances is known.		Doppler Effect Calculation of the acoustic Doppler effect and simulation of tones, depending on the speed of the sound source and the listener.
	g-Acceleration Calculation of the g-force with linear acceleration or with constant speed in a curve. Straight Acceleration, Curve, Distance, g-Force, Fall Velocity, Uplift, Felt Weight, Orbital Speed		Material Calculator Calculator for estimating the volume, weight or mass, density or size of a body. Size - Weight, Volume - Weight, Rectangular Sheet, Density of Mixed Materials, Extrapolate Mass, Displacement, Specific Volume,
	Everyday Physics Tools for specific cases of measuring and calculating. Stone in Well, Lightning and Thunder, Echo, Distance per TimeAdd Forces, Energy, Frequency		Liters in a Container How many liters does a container of a certain size hold? Box, Can, Bucker, Bowl, Plate, Barrel, Tank, Pool, Balloon Water Consumption, Fill Container
	Distance of the Planets Calculator for different sizes of planets, moon and sun. Planetary Mass, Planetary Diameter, Planetary Circumference, Planetary Surface Area, Planetary Volume, Planetary Density Solar System Model		Physical Quantities Force, work and other quantities. Force, Work, Power, Pressure, Acceleration, Momentum, Torque, Lever
	Calculate Field Several calculators for the shape, size and extent of a field and for various units of measurement. Quadratic, Rectangular, Rhomboid, Hexagonal, Round, Half-Round, Arena, Volume on an Area		Size Comparison Compares quantities with different units and reference quantities. Length, Velocity, Mass
	Atomic Collider An online particle accelerator for simulating the collisions and decay of atomic nuclei. Simulation of fusion and different types of decay.		Snow Load Calculates the snow load on a flat surface for different snow types.
	Planck Units Conversion of common physical units into Planck units. Planck Length, Planck Time, Planck Mass, Planck Temperature, Planck Charge
Economy		↑
	Formulas for Banking and Business Important calculations for banking calculations and business studies. Cash Discount Rate, Return on Equity, Linear Deduction, Optimal Order Quantity ...		Calculation of Percentage and Interests Calculates percentages and interest rates. Interest, Compound Computation of Interest, ppm, Formulas
	Price Table Matrix Calculator Calculator for a price matrix for 1, 2 or 3 products. Price per Amount, Price per Weight (Mass), Percent Table		Sustainable Stocks A list of sustainable stocks or shares, from environment and climate friendly companies, traded at an exchange.
	Ratios of a Value Allocation evenly or with a distribution key, determination of the rest. Percentage, Integer Division, Partition with Remainder, Weighted Distribution, Fee		Production - Amount and Time Calculates the number of items produced in a period from one or more regular productions. Production Counter, Utilization
Time & Date		↑
	Calendar Calculations Calculate different calendar dates. Weekdays, Scheduler, Leap Years		World Clock and Time Zones The times in all countries and zones in the world. Time Zones True Local Time
	Add and Subtract Time Small calculators for adding / subtracting and multiplying / dividing times. Multiplicate and Divide Time, Time and Date, Add Multiple Time Data, Add / Subtract Days to a Date, Ratio of two Time Values		Zodiac Signs Calculator This calculator determines the zodiac, the Chinese and Indian zodiac signs.
	Year of Birth Calculate the year of birth, the exact age or the time from a certain date. Age, Time until Birthday, Age Difference, Age Comparison, Span of Years, Century		Flight Time Calculator Calculate the duration of a flight from take-off time, landing time and the time zones at the take-off point and landing point.
	Regularity and Repetition Many things happen several times in a certain period of time. Here it can be calculated how often these will then take place in any other period of time. Extrapolate, Average Frequency, Occurrence of Events, Process Time, Automatic Counter		Calculate a Deadline Calculator for the period from a date to a deadline. Frequent Dates, Weekday calculation, Week Number, Time passed, In / before ... Weeks, In / before ... Months, Remaining Time, Compare Time Spans
Household		↑
	Measurements of a Staircase Calculator for dimensions, number of steps, step size, gradient ratio and angle of inclination. Handrail, Steps, Spiral Staircase		Roof Calculator Calculates the height, length or width of a roof from the angle of inclination. Interior Space, Roof Pitch
	Paper Size Calculator Compare DIN A, B, C, D. Paper Weight, Papier Stack Thickness, Paper Volume		Candle Burn Time Calculate how long a candle of a given size or weight can burn. Mixed Wax Candles
	Heating Power calculated from room size and insulation. Heating Cost, Heating Oil, Infrared Heating, Underfloor Heating, Heat Pump
Health & Body		↑
	Health and Fitness Calculators Calculate body mass index (BMI) and many other things about health. Calorie Consumption, Liquid Consumption Nutrition Values, Nutrition Table ...		Race Time Calculator Calculator for times of athletic performance and the like. Distance, time and speed in different units. Time per Distance, Pace, Run Time Comparison, Hiking Speed, Step Counter, Calories per Step / Distance, Multi-Day Tour, Remaining Time
	When Will the Pack of Medication Run Out Calculates how long a pack of medication lasts if taken regularly. Vitamin D		Cost of Smoking Calculator for the money you pay over time for smoking or the money you save when you quit smoking.
Technics & IT		↑
	Data Transfer Time over USB or internet, their speed or size. Start and End Time, Compression, Binary Prefixes, Baud		Word analysis Calculates the number of words, characters, digits and single letters in a text.
	Optical Instruments Calcualtions at Magnifying Glass, Glasses, Microscope, Telescope, Binocular, Objective, Digital Camera, Monitor, Image S ize: focal length, magnification, exit pupil, format, resolution		Photographic Exposure Calculates the camera settings for exposure. Exif Viewer, Photos Resolution and Ratio Conversion, Width-to-Height Ratio
	Number Systems Conversion This allows values to be converted into other number systems: binary, octal, decimal, hexadecimal, other base.		Wheel Revolutions and Distance Calculator for the number of revolutions a wheel makes on a certain distance. Pendulum
	Pump Size Calculator Calculator for volume flow, volume, time, diameter and speed of a pump. Delivery Height, Drain Time		Accu Charge Calculator for the speed and duration of a battery charge. Electric Charge Units, Charge Cost, Solar Charging
	Photovoltaics - Calculate Power and Surface Area Output per area and area per output of a photovoltaic system and solar modules. Modules per Area, Power and Energy, Revenue Units, Costs and Yield, Amortization Time, Yield per Time		Wind Turbine Power Calculates the performance of a wind turbine. Nominal Power Wind Turbine, Wind Turbine Yield, Wind Turbine Rotation, Wind Turbine Magnitude
	Hydropower Turbine Calculator Calculates the performance of a hydropower plant. Reservoir Power Station Energy		Energy Various calculations for the generation, storage and conversion of energy. Units, Fuel Cell, Power-to-Gas, Heat, Solar constant, Efficiency Factors
	Letter Value Calculator Assigns values to letters of text or a string and calculates the sum.		Calculate Hashes Calculator for hashes with the functions: SHA-1, SHA-256, SHA-512, SHA-3
	Color Mixer Mix a color from red, green and blue parts.
Cars & Traffic		↑
	Speeding Fines in Germany Find out the penalty for driving too fast. Over speeding Car, Truck		Arrival Time Calculator for the arrival time and duration of a trip from the start time, route and average speed. Departure Time, Average Speed
	E-Bike Several calculators for electric bikes. Battery, Range, Uphill, Charging Time		Knot - Nautical Mile - Calculator for Ships Calculator for speed in knots and distance in nautical miles in shipping.
	CO2 Emission The carbon dioxide emissions of a car for a certain distance and per kilometer can be calculated here. CO2 Emissions of an Airplane, CO2 Price, CO2 Removal of Trees
Geography		↑
	Geo-coordinates Conversion of different formats of geo-coordinates, e.g. from GPS devices. Seconds, Decimal Degrees, Decimal Minutes Mean Value, Batch Processing, Directions, Highest Solar Altitude		Map Scale Calculator Calculate with scales of a map. Map Size on a Monitor, Scale Comparison, Model, Length per Pixel, Pixel Size, Pixel Ruler
	Earth Radius Calculate the radius and diameter of the earth by latitude. Distance to Equator, to North and South Pole, Earth's Curvature		Random Position Random location on earth, display with Google Maps.
	Sun Position Calculator for the position of the sun from the location, date and time.
Art		↑
	Note Calculator Calculates note frequencies when you click on a keyboard and generates corresponding sine tones.		Music Calculators Several auxiliary calculators for notes and tones. Tuning, Note Length, Intervals, Note Ratio, Frequency of a String
	Color Calculator Calculates the values for colors. With color palette and converter. Mix Colors, Complementary Color, Gray Tone		Square Tessellation Creation of colored patterns from squares and determination of the material needed.
	Circles around a Circle Calculates the size of a certain number of circles around a center circle and draws a sketch. Sometimes creates interference patterns.