Calculator

Calculators for developers: programmer/bitwise/base/IEEE-754, BigInt & high precision, subnetting (CIDR/IPv4/IPv6), units & storage, date & time, math, CSS/typography, media, and finance — all in your browser.

Audio

Compute audio bitrate, sample rate, and file size.

Audio Bitrate Calculator Online

Compute audio bitrate from file size and duration. Free, fast, and runs entirely in your browser.

Audio File Size Calculator Online

Compute audio file size from bitrate and duration. Free, fast, and runs entirely in your browser.

Sample Rate Calculator Online

Compute uncompressed PCM bitrate from sample rate, bit depth, and channels. Free, fast, and runs entirely in your browser.

Base Conversion

Convert numbers between bases: binary, octal, decimal, hex, and 2–36.

Base Converter (2–36) Online

Convert numbers between any base from 2 to 36 (binary, octal, decimal, hex, and more). Free, fast, and runs entirely in your browser.

Binary ⇄ Decimal Converter Online

Convert Binary ⇄ Decimal both ways — fast and accurate, in the browser. Free, fast, and runs entirely in your browser.

Binary ⇄ Hex Converter Online

Convert Binary ⇄ Hex both ways — fast and accurate, in the browser. Free, fast, and runs entirely in your browser.

Binary ⇄ Octal Converter Online

Convert Binary ⇄ Octal both ways — fast and accurate, in the browser. Free, fast, and runs entirely in your browser.

Decimal ⇄ Hex Converter Online

Convert Decimal ⇄ Hex both ways — fast and accurate, in the browser. Free, fast, and runs entirely in your browser.

Decimal ⇄ Octal Converter Online

Convert Decimal ⇄ Octal both ways — fast and accurate, in the browser. Free, fast, and runs entirely in your browser.

Hex ⇄ Octal Converter Online

Convert Hex ⇄ Octal both ways — fast and accurate, in the browser. Free, fast, and runs entirely in your browser.

Basic

Basic, scientific, expression, and formula calculators.

Basic Calculator Online

Quickly evaluate arithmetic expressions (add, subtract, multiply, divide, power, parentheses). Free, fast, and runs entirely in your browser.

Expression Calculator Online

Evaluate any one-line math expression — operators, functions, and constants. Free, fast, and runs entirely in your browser.

Formula Calculator Online

Compute math formulas with functions and constants — fast and accurate, in the browser. Free, fast, and runs entirely in your browser.

Scientific Calculator Online

A scientific calculator with trigonometry, logarithms, roots, powers, and constants (π, e). Free, fast, and runs entirely in your browser.

Big Number

BigInt and high decimal precision with no floating-point error.

Arbitrary Precision Calculator Online

Calculate at as much precision as you want — up to hundreds of significant digits. Free, fast, and runs entirely in your browser.

BigInt Calculator Online

Compute very large integers with no loss of precision (BigInt). Free, fast, and runs entirely in your browser.

Decimal Precision Calculator Online

Compute decimals at a configurable high precision — free of floating-point error. Free, fast, and runs entirely in your browser.

Bitwise

Bit operations: AND/OR/XOR/NOT/NAND/NOR/XNOR, shifts, and bit count.

Bitwise AND Calculator

Bitwise AND operation: A result bit is 1 only if both bits are 1. Free, fast, and runs entirely in your browser.

Bitwise Bit Count Calculator

Bitwise Bit Count operation: Counts the number of set bits (popcount). Free, fast, and runs entirely in your browser.

Bitwise Bit Length Calculator

Bitwise Bit Length operation: Counts the number of significant bits. Free, fast, and runs entirely in your browser.

Bitwise Calculator Online

Perform bitwise operations (AND, OR, XOR, NOT, NAND, NOR, XNOR) on two numbers. Free, fast, and runs entirely in your browser.

Bitwise Left Shift Calculator

Bitwise Left Shift operation: Shift bits left (multiply by 2ⁿ). Free, fast, and runs entirely in your browser.

Bitwise NAND Calculator

Bitwise NAND operation: The inverse of AND. Free, fast, and runs entirely in your browser.

Bitwise NOR Calculator

Bitwise NOR operation: The inverse of OR. Free, fast, and runs entirely in your browser.

Bitwise NOT Calculator

Bitwise NOT operation: Flips every bit (one's complement). Free, fast, and runs entirely in your browser.

Bitwise OR Calculator

Bitwise OR operation: A result bit is 1 if either bit is 1. Free, fast, and runs entirely in your browser.

Bitwise Right Shift Calculator

Bitwise Right Shift operation: Shift bits right (divide by 2ⁿ, arithmetic). Free, fast, and runs entirely in your browser.

Bitwise Unsigned Right Shift Calculator

Bitwise Unsigned Right Shift operation: Shift right without preserving the sign. Free, fast, and runs entirely in your browser.

Bitwise XNOR Calculator

Bitwise XNOR operation: The inverse of XOR (1 if bits match). Free, fast, and runs entirely in your browser.

Bitwise XOR Calculator

Bitwise XOR operation: A result bit is 1 if the bits differ. Free, fast, and runs entirely in your browser.

CSS & Typography

rem/em/px, line-height, font scale, specificity, and z-index.

CSS Specificity Calculator Online

Compute the specificity value (a,b,c) of a CSS selector. Free, fast, and runs entirely in your browser.

EM to PX Converter

Convert between em and px based on an element's base font size. Free, fast, and runs entirely in your browser.

Font Size Scale Calculator Online

Compute a modular typographic scale from a base size and ratio. Free, fast, and runs entirely in your browser.

Line Height Calculator Online

Compute a unitless line-height ratio from font size and line height. Free, fast, and runs entirely in your browser.

REM to PX Converter

Convert between rem and px based on the root font size. Free, fast, and runs entirely in your browser.

z-index Layer Calculator

Generate clean tiered z-index values from a list of layer names. Free, fast, and runs entirely in your browser.

Data

JSON size & depth and SQL pagination.

JSON Depth Calculator Online

Compute a JSON's maximum nesting depth and total key count. Free, fast, and runs entirely in your browser.

JSON Size Calculator Online

Compute JSON size (original vs minified) and the savings. Free, fast, and runs entirely in your browser.

SQL Pagination Calculator Online

Compute LIMIT/OFFSET and total pages for SQL pagination. Free, fast, and runs entirely in your browser.

Date & Time

Date difference, age, business days, leap year, timestamp, and duration.

Add/Subtract Date Calculator Online

Add or subtract days, weeks, months, or years from a date. Free, fast, and runs entirely in your browser.

Age Calculator Online

Compute exact age from a birth date in years, months, and days. Free, fast, and runs entirely in your browser.

Business Days Calculator Online

Count the number of business days (Mon–Fri) between two dates. Free, fast, and runs entirely in your browser.

Date Difference Calculator Online

Compute the difference between two dates in years, months, days, and totals. Free, fast, and runs entirely in your browser.

Duration Calculator Online

Turn a duration in seconds into days/hours/minutes/seconds and ISO 8601 format. Free, fast, and runs entirely in your browser.

Leap Year Calculator Online

Check whether a year is a leap year and how many days it has. Free, fast, and runs entirely in your browser.

Time Difference Calculator Online

Compute the difference between two times (hours:minutes) in hours, minutes, and seconds. Free, fast, and runs entirely in your browser.

Unix Timestamp Calculator Online

Convert between a Unix timestamp and a human date (UTC/ISO). Free, fast, and runs entirely in your browser.

Finance

Discount, tax, margin, ROI, compound interest, and loans.

Compound Interest Calculator Online

Compute investment growth with compound interest. Free, fast, and runs entirely in your browser.

Discount Calculator Online

Compute the price after a discount and the amount saved. Free, fast, and runs entirely in your browser.

Loan Calculator Online

Compute the monthly payment, total paid, and total interest of a loan. Free, fast, and runs entirely in your browser.

Profit Margin Calculator Online

Compute profit, margin, and markup from cost and revenue. Free, fast, and runs entirely in your browser.

ROI Calculator Online

Compute Return on Investment (ROI) from gain and investment cost. Free, fast, and runs entirely in your browser.

Tax Calculator Online

Compute tax added to a price, or tax already included in a price. Free, fast, and runs entirely in your browser.

IEEE-754

Inspect, encode, and decode IEEE-754 float representations.

Float Calculator Online

Compute a float operation and see the result with its IEEE-754 representation. Free, fast, and runs entirely in your browser.

Float Converter Calculator Online

Convert a float to its IEEE-754 bits (hex/binary) and back. Free, fast, and runs entirely in your browser.

Float Inspector Calculator Online

Dissect a float's IEEE-754 representation: sign, exponent, and mantissa. Free, fast, and runs entirely in your browser.

IEEE754 Decoder Calculator Online

Decode an IEEE-754 bit pattern (hex or binary) into its float value. Free, fast, and runs entirely in your browser.

IEEE754 Encoder Calculator Online

Encode a float into its IEEE-754 bit pattern (hex and binary). Free, fast, and runs entirely in your browser.

Image

Aspect ratio, DPI/PPI, and image resolution.

Aspect Ratio Calculator Online

Compute the aspect ratio (e.g. 16:9) from a width and height. Free, fast, and runs entirely in your browser.

DPI Calculator Online

Compute DPI from pixel resolution and physical diagonal size. Free, fast, and runs entirely in your browser.

Image Ratio Calculator Online

Compute an image's ratio and proportions from its dimensions. Free, fast, and runs entirely in your browser.

PPI Calculator Online

Compute PPI (pixels per inch) from resolution and screen diagonal. Free, fast, and runs entirely in your browser.

Resolution Calculator Online

Compute total pixels, megapixels, and aspect ratio from a resolution. Free, fast, and runs entirely in your browser.

Math

Matrix, vector, fraction, percentage, prime, statistics, and more.

Average Calculator Online

Quickly compute the average of a set of numbers. Free, fast, and runs entirely in your browser.

Combinations Calculator Online

Compute combinations C(n, r) — ways to choose r from n, order irrelevant. Free, fast, and runs entirely in your browser.

Factorial Calculator Online

Compute the factorial n! for large numbers at full precision (BigInt). Free, fast, and runs entirely in your browser.

Fibonacci Calculator Online

Compute the nth Fibonacci number F(n) at full precision. Free, fast, and runs entirely in your browser.

Fraction Calculator Online

Add, subtract, multiply, and divide fractions — results auto-simplified. Free, fast, and runs entirely in your browser.

GCD Calculator Online

Compute the Greatest Common Divisor (GCD) of several numbers. Free, fast, and runs entirely in your browser.

LCM Calculator Online

Compute the Least Common Multiple (LCM) of several numbers. Free, fast, and runs entirely in your browser.

Matrix Calculator Online

Add, subtract, multiply, transpose, and compute the determinant of matrices. Free, fast, and runs entirely in your browser.

Mean Calculator Online

Quickly compute the mean of a set of numbers. Free, fast, and runs entirely in your browser.

Median Calculator Online

Quickly compute the median of a set of numbers. Free, fast, and runs entirely in your browser.

Mode Calculator Online

Quickly compute the mode of a set of numbers. Free, fast, and runs entirely in your browser.

Percentage Calculator Online

Compute percentages: X% of Y, X is what % of Y, or increase Y by X%. Free, fast, and runs entirely in your browser.

Percentage Change Calculator Online

Compute the percentage increase or decrease between two values. Free, fast, and runs entirely in your browser.

Permutations Calculator Online

Compute permutations P(n, r) — ways to arrange r from n, order matters. Free, fast, and runs entirely in your browser.

Prime Number Calculator Online

Check whether a number is prime and, if not, show its factorization. Free, fast, and runs entirely in your browser.

Statistics Calculator Online

Compute mean, median, mode, range, variance, and standard deviation at once. Free, fast, and runs entirely in your browser.

Vector Calculator Online

Compute dot product, cross product, magnitude, normalization, and vector add/subtract. Free, fast, and runs entirely in your browser.

Network

CIDR, IPv4/IPv6 subnet, broadcast, mask, and host count.

Broadcast Calculator Online

The broadcast address Free, fast, and runs entirely in your browser.

CIDR Calculator Online

Compute network, broadcast, mask, and host range from CIDR notation. Free, fast, and runs entirely in your browser.

Hosts Calculator Online

The number of usable hosts in a subnet Free, fast, and runs entirely in your browser.

IPv4 Subnet Calculator Online

A full IPv4 subnet calculator: network, broadcast, mask, and host count. Free, fast, and runs entirely in your browser.

IPv6 Subnet Calculator Online

Compute network, range, and total addresses of an IPv6 subnet. Free, fast, and runs entirely in your browser.

Network Mask Calculator Online

The subnet mask from a prefix Free, fast, and runs entirely in your browser.

Wildcard Mask Calculator Online

The wildcard mask (inverse subnet mask) Free, fast, and runs entirely in your browser.

Programmer

Hex/oct/bin/dec, ASCII, and Unicode calculators for developers.

ASCII Calculator Online

Convert between characters and ASCII/byte codes — with hex, octal, and binary. Free, fast, and runs entirely in your browser.

Binary Calculator Online

Convert and inspect a binary number to decimal, hex, octal, and binary at once. Free, fast, and runs entirely in your browser.

Decimal Calculator Online

Convert and inspect a decimal number to decimal, hex, octal, and binary at once. Free, fast, and runs entirely in your browser.

Hex Calculator Online

Convert and inspect a hex number to decimal, hex, octal, and binary at once. Free, fast, and runs entirely in your browser.

Octal Calculator Online

Convert and inspect a octal number to decimal, hex, octal, and binary at once. Free, fast, and runs entirely in your browser.

Programmer Calculator Online

Evaluate integer expressions across bases (hex/oct/bin/dec) with bitwise operators. Free, fast, and runs entirely in your browser.

Unicode Calculator Online

Convert between characters and Unicode code points (U+XXXX) plus UTF-8 bytes. Free, fast, and runs entirely in your browser.

Security

Password entropy, key size, and regex complexity (ReDoS).

Key Size Calculator Online

Convert a cryptographic key size between bits, bytes, hex, and Base64. Free, fast, and runs entirely in your browser.

Password Entropy Calculator Online

Compute the entropy (bits) and strength of a password. Free, fast, and runs entirely in your browser.

Regex Complexity Calculator Online

Score regex complexity and flag ReDoS (catastrophic backtracking) risk. Free, fast, and runs entirely in your browser.

Storage

Bit/byte and SI vs IEC (KB/KiB) conversions, plus data transfer.

Bit ⇄ Byte Converter

Convert Bit ⇄ Byte both ways — mind the 1000 (SI) vs 1024 (IEC) difference. Free, fast, and runs entirely in your browser.

Data Transfer Calculator Online

Calculate how long it takes to transfer a file at a given size and speed. Free, fast, and runs entirely in your browser.

GB ⇄ GiB Converter

Convert GB ⇄ GiB both ways — mind the 1000 (SI) vs 1024 (IEC) difference. Free, fast, and runs entirely in your browser.

KB ⇄ KiB Converter

Convert KB ⇄ KiB both ways — mind the 1000 (SI) vs 1024 (IEC) difference. Free, fast, and runs entirely in your browser.

MB ⇄ MiB Converter

Convert MB ⇄ MiB both ways — mind the 1000 (SI) vs 1024 (IEC) difference. Free, fast, and runs entirely in your browser.

TB ⇄ TiB Converter

Convert TB ⇄ TiB both ways — mind the 1000 (SI) vs 1024 (IEC) difference. Free, fast, and runs entirely in your browser.

Unit

Convert length, weight, temperature, energy, angle, and more.

Angle Converter

Convert angle units (rad, deg, grad, turn, arcmin, arcsec) quickly and accurately. Free, fast, and runs entirely in your browser.

Area Converter

Convert area units (mm², cm², m², ha, km², in², ft², acre, mi²) quickly and accurately. Free, fast, and runs entirely in your browser.

Data Size Converter

Convert data sizes between bits, bytes, and SI (KB) or IEC (KiB) units. Free, fast, and runs entirely in your browser.

Energy Converter

Convert energy units (J, kJ, cal, kcal, Wh, kWh, eV, BTU) quickly and accurately. Free, fast, and runs entirely in your browser.

Frequency Converter

Convert frequency units (Hz, kHz, MHz, GHz, THz, RPM) quickly and accurately. Free, fast, and runs entirely in your browser.

Fuel Economy Converter

Convert fuel economy units (km/l, mpg (US), mpg (UK), l/100km) quickly and accurately. Free, fast, and runs entirely in your browser.

Length Converter

Convert length units (mm, cm, m, km, in, ft, yd, mi, nmi) quickly and accurately. Free, fast, and runs entirely in your browser.

Power Converter

Convert power units (W, kW, MW, hp, PS) quickly and accurately. Free, fast, and runs entirely in your browser.

Pressure Converter

Convert pressure units (Pa, kPa, bar, psi, atm, torr, mmHg) quickly and accurately. Free, fast, and runs entirely in your browser.

Speed Converter

Convert speed units (m/s, km/h, mph, ft/s, knot) quickly and accurately. Free, fast, and runs entirely in your browser.

Temperature Converter

Convert temperature between Celsius, Fahrenheit, Kelvin, and Rankine. Free, fast, and runs entirely in your browser.

Time Unit Converter

Convert time units (ns, µs, ms, seconds, minutes, hours, days, weeks, years). Free, fast, and runs entirely in your browser.

Volume Converter

Convert volume units (ml, l, m³, tsp, tbsp, fl oz, cup, pt, qt, gal) quickly and accurately. Free, fast, and runs entirely in your browser.

Weight Converter

Convert weight units (mg, g, kg, t, oz, lb, st) quickly and accurately. Free, fast, and runs entirely in your browser.

Utilities

Human-readable bytes & duration, percent difference, and ratio.

Human Readable Bytes Calculator Online

Turn a byte count into a human-readable format (KB/MB/GB or KiB/MiB/GiB). Free, fast, and runs entirely in your browser.

Human Readable Duration Calculator Online

Turn seconds into a human-readable duration (years/days/hours/minutes/seconds). Free, fast, and runs entirely in your browser.

Percentage Difference Calculator Online

Compute the percentage difference between two values (relative to their average). Free, fast, and runs entirely in your browser.

Ratio Calculator Online

Simplify two numbers to their smallest ratio (e.g. 1920:1080 → 16:9). Free, fast, and runs entirely in your browser.

Video

Bitrate, frame/timecode, aspect ratio, and streaming bandwidth.

Related Categories

Cryptography Formatter Data