Engines
Nerdulator is 14 independent engines behind one input box. Each one declares what it recognises, and returns structured facts rather than rendered markup, which is why the pages all look the same however different the subject matter is.
Between them they perform 321 named transformations, plus 23 calculators that need more than one input. Expand an engine to see everything it computes. The calculators are listed separately.
IP & networking
ipIPv4 and IPv6 address analysis, CIDR subnet and prefix calculations.
23 transformations
- IPv4 address analysis
- 32-bit integer form
- Binary and octal forms
- Reverse DNS name
- IPv4-mapped IPv6
- Special-use range classification
- Legacy class
- CIDR calculations
- Subnet mask
- Wildcard mask
- Network address
- Broadcast address
- Usable host range
- Number of hosts
- RFC 3021 point-to-point handling
- Related prefixes
- IPv6 address parsing
- RFC 5952 compression
- Full expansion
- IPv6 prefix arithmetic
- IPv6 range classification
- IPv6 reverse DNS
- Embedded IPv4 in IPv6
Web
webURL and email address structure, parts and encodings. Syntax only, never a network lookup.
16 transformations
- URL structure
- Scheme, host and port
- Path segments
- Query parameters
- Fragment
- Domain labels and TLD
- Percent encoding
- Email address parts
- RFC length validation
- mailto links
- HTTP status codes
- Status class and cacheability
- Well-known port numbers
- IANA port ranges
- MIME media types
- File extension to media type
Developer identifiers
devCron expressions, UUIDs, semantic versions and checksummed identifiers, decomposed.
14 transformations
- Cron field expansion
- Cron in plain English
- Next scheduled runs
- Day-of-month/day-of-week OR rule
- UUID version and variant
- UUID embedded timestamps (v1, v6, v7)
- Semantic version components
- Semver precedence rules
- Caret and tilde range expansion
- ISBN-10 and ISBN-13 check digits
- ISBN-10 to ISBN-13 conversion
- EAN-13 and UPC-A check digits
- Luhn validation
- IBAN mod-97 validation
Reference tables
referencePolyhedra, paper sizes, screen resolutions, solar-system bodies and musical pitches.
23 transformations
- Platonic and Archimedean solids
- Faces, edges, vertices and Euler characteristic
- Polyhedron volume, area and dihedral angle
- Dual polyhedra
- ISO 216 and North American paper sizes
- Paper size in mm, inches, points and pixels
- Screen resolution aspect ratios
- Megapixels and pixel density
- Solar-system body mass and radius
- Surface gravity and escape velocity
- Weight on another world
- Musical pitch to frequency
- MIDI note numbers
- Enharmonic equivalents
- Wavelength of a pitch in air
- Gas mark to Celsius and Fahrenheit
- Resistor colour band decoding
- Resistance tolerance and E-series
- Unicode code point analysis
- UTF-8, UTF-16 and UTF-32 encodings
- HTML, CSS and JavaScript escapes
- Unicode block and plane
- General category
Colour
colour141 named colours, 16.7 million addressableHEX, RGB, HSL, HSV and CMYK conversion with contrast, harmonies and named-colour matching.
23 transformations
- HEX
- RGB
- HSL
- HSV and HSB
- Approximate CMYK
- 24-bit integer
- Relative luminance
- Perceived brightness
- Greyscale
- Inverted
- Complementary colour
- Analogous colours
- Triadic colours
- Split complementary
- Tetradic
- Lighter variants
- Darker variants
- Saturation variants
- WCAG contrast ratios
- Black or white text recommendation
- Nearest named colour by CIELAB
- Similar named colours
- Channel breakdown
Date
dateCalendar position, formats, Unix time and navigation for any date from year 1 to 9999.
29 transformations
- Day of the week
- Day of the year
- ISO week number
- Month
- Quarter
- Year
- Leap year status
- Days in the month
- Days remaining in the year
- Days elapsed in the year
- Previous and next day
- Previous and next week
- Previous and next month
- Previous and next year
- ISO 8601 date
- British and American formats
- RFC 2822
- Unix timestamp
- Unix timestamp in milliseconds
- Unix epoch relationship
- Julian Day Number
- Zodiac sign
- Chinese zodiac
- Season
- Days, months and years from today
- Easter Sunday
- Weekday occurrence in the month
- Julian calendar equivalent before 1582
- Whole-year pages
Units
unit184 units across 17 categoriesConversion across 17 categories and 184 units, all defined as data.
21 transformations
- Length and distance
- Mass and weight
- Temperature
- Area
- Volume
- Speed
- Time
- Energy
- Power
- Pressure
- Data and storage
- Data rate
- Frequency
- Angle
- Force
- Density
- Fuel economy
- Focused conversions (X in Y)
- Exact conversion factors
- Reverse conversion
- The formula used
Computing
computingBase literals, bit widths, Unix timestamps and Base64.
16 transformations
- Decimal to binary
- Decimal to hexadecimal
- Decimal to octal
- Binary to hexadecimal
- Base 32 and base 36
- ASCII characters
- Unicode code points
- Base64 decoding
- Unix timestamps
- Bit length and byte length
- Population count
- Two’s complement
- Bitwise NOT
- Shifts
- Byte-order swap
- Interpretation as a colour, an IPv4 address or a duration
Maths
mathsFractions, percentages, ratios, money arithmetic, statistics and expression evaluation.
28 transformations
- Percentages
- Percentage change
- Percentage increase and decrease
- Fractions
- Fraction simplification
- Mixed numbers
- Equivalent fractions
- Ratios
- GCD
- LCM
- Powers
- Roots
- Logarithms
- Factorials
- Permutations
- Combinations
- Probability
- Mean
- Median
- Mode
- Range
- Variance
- Standard deviation
- Quartiles and IQR
- Outlier detection
- Basic algebra (quadratics)
- Money arithmetic and VAT
- Safe expression evaluation
Geometry
geometryAreas, perimeters, volumes and angles for the common 2D and 3D shapes.
15 transformations
- Circle area and circumference
- Rectangle area and perimeter
- Square
- Triangle area and perimeter
- Triangle side and angle calculations
- Hypotenuse
- Pythagorean triples
- Sphere volume and surface area
- Cube volume and surface area
- Cylinder volume and surface area
- Cone volume and slant height
- Rectangular prism volume
- Angle calculations
- Inradius and circumradius
- SVG diagrams
Science
science29 constants, 118 elementsPhysical constants, chemical elements, molar masses and physics calculators.
18 transformations
- Physical constants
- Exact versus measured values
- Chemical elements
- Atomic weights
- Molar mass of a formula
- Percentage composition
- Speed, distance and time
- Kinetic energy
- Potential energy
- Ohm's law
- Electrical power
- Density
- Pressure
- Frequency and wavelength
- Photon energy
- Ideal gas calculations
- Basic pH calculations
- Half-life and decay
Geography
geography59 countriesCountry reference data, coordinates, great-circle distance and bearing.
17 transformations
- Country
- Capital
- Continent
- ISO 3166 codes
- Internet TLD
- Calling code
- Currency
- Population (versioned)
- Neighbouring countries
- Coordinates
- Time zone
- Daylight saving
- Area
- Distance between coordinates
- Bearing and compass point
- Antipode
- Coordinate formats (decimal, DMS, radians)
Number
numberInteger and decimal properties: primality, factors, bases, words, powers.
46 transformations
- Previous and next number
- Even or odd
- Prime or composite
- Absolute value
- Square
- Cube
- Square root
- Cube root
- Factors
- Prime factorisation
- Number of divisors
- Sum of divisors
- Aliquot sum
- Digital root
- Digit sum
- Binary
- Octal
- Decimal
- Hexadecimal
- Base 32 and 36
- Roman numeral
- English number name
- Ordinal name
- Percentage representations
- Scientific notation
- Engineering notation
- Powers
- Multiples
- Divisibility tests
- Nearest square above and below
- Next and previous prime
- Distance to nearest prime
- Euler's totient
- Squarefree check
- Perfect, abundant or deficient
- Triangular number
- Fibonacci number
- Happy number
- Harshad number
- Armstrong number
- Palindromic check
- Factorial
- Reciprocal
- IEEE 754 bit pattern
- Best rational approximation
- Rounding and significant figures
Text
wordCharacter counts, case conversions, encodings, frequency and word-game scores.
32 transformations
- Character count
- Letter count
- Digit count
- Whitespace count
- Word count
- Unique character count
- Vowel count
- Consonant count
- First and last character
- First and last letter
- Uppercase
- Lowercase
- Title Case
- Sentence case
- camelCase
- snake_case
- kebab-case
- Reversed text
- Alphabet positions
- Character frequency
- Palindrome status
- Anagram signature
- Scrabble score
- Words With Friends score
- Unicode code points
- UTF-8 byte length
- Base64
- URL encoding
- HTML entity encoding
- ROT13
- Morse code
- NATO alphabet