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🏠 Home, food & hobbiesFree
Party punch batch calculator
Scale a punch tested for 8 to a bowl for 24: 250, 500 and 750 of spirit, juice and mixer become 750, 1500 and 2250, with the amount per glass and each share…
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🏠 Home, food & hobbiesFree
Wine Bottles for Guests Calculator
60 wine drinkers over a 4-hour event need 48 bottles: one glass per guest per hour, five glasses to a bottle, always rounded up.
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🏠 Home, food & hobbiesFree
Appetizer count per person calculator
24 guests at a cocktail-style party need 144 appetizer pieces, at six per person. Choose light, cocktail or heavy service and the guest count, and get a…
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🏠 Home, food & hobbiesFree
Food refrigerator storage time
Raw chicken keeps 1 to 2 days in the fridge, cooked leftovers 3 to 4, and whole apples 4 to 6 weeks.
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🏠 Home, food & hobbiesFree
Servings to total weight calculator
24 servings at 125 g each need 3000 g of food: multiply your guest or container count by one fixed portion weight and get the total to cook or buy.
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🏠 Home, food & hobbiesFree
Cooking start time calculator from serve time and step durations
Serve at 19:30 with steps that add up to 65 minutes and you start at 18:25: list every step, and the start time comes back with a clear note when it falls on an…
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🏠 Home, food & hobbiesFree
Recipe total cost calculator
Find what a recipe really costs: 1.5 kg of flour, 4 eggs and 0.25 kg of butter, each multiplied by the price of one unit, give a cost per ingredient and the…
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🏠 Home, food & hobbiesFree
Side dish quantity per person calculator
Twelve guests at half a cup of coleslaw each need 6 cups in total. Enter the headcount and the portion you serve per person, in cups, grams, ounces or scoops…
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⚙️ Developer UtilitiesFree
Bitwise NAND calculator
12 NAND 10 at 8 bits is 247, binary 11110111 and hex f7, after an intermediate AND of 8. Choose a width from 1 to 53 bits and see each step in decimal…
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⚙️ Developer UtilitiesFree
Population count (popcount) calculator
Count how many ones a number has in binary: 42 written in 8 bits is 00101010, with 3 ones at positions 1, 3 and 5 and 5 zeros.
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⚙️ Developer UtilitiesFree
Arithmetic right shift calculator
At 8 bits, −42 shifted right by 3 gives −6: the pattern 11010110 becomes 11111010 because the sign bit is copied into the freed places.
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⚙️ Developer UtilitiesFree
Bit mask generator
Four consecutive ones starting at bit 0 make the mask 15: 0b1111 in binary and 0xf in hex. Give the width and, if needed, the lowest bit position, and get the…
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⚙️ Developer UtilitiesFree
Bitmask flags decoder
With read (1), write (2), execute (4) and admin (8), the value 13 decodes to read, execute and admin, with nothing left unexplained.
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⚙️ Developer UtilitiesFree
Byte array to integer calculator
The bytes 0, 1, 2, 3 read big-endian make 66051, hex 0x00010203; read little-endian they make 50462976.
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⚙️ Developer UtilitiesFree
Hamming Distance Between Integers Calculator
Enter two whole numbers and get their Hamming distance: 29 and 15 differ in 2 bit positions, because their XOR is 18, or 10010 in binary.
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⚙️ Developer UtilitiesFree
Highest set bit position calculator
13 is 1101 in binary, so its highest set bit sits at position 3, with a bit length of 4 and 8 as the largest power of two that does not exceed it.
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⚙️ Developer UtilitiesFree
Test bit at position calculator
42 is 101010 in binary, so the bit at position 3, worth 8, is set: enter a whole number and a position counted from 0 on the right to get a yes-or-no answer and…
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⚙️ Developer UtilitiesFree
Unsigned to signed integer calculator
255 in 8 bits is all ones, so read as a signed number it becomes −1: enter an unsigned value and a width from 2 to 53 bits to get its two's-complement reading…
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➗ MathFree
Balanced ternary calculator
42 becomes +---0 in balanced ternary, a base-three system whose digits are −1, 0 and +1. The calculator shows each power of three it uses, counts the trits and…
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⚙️ Developer UtilitiesFree
Bit Length of Integer Calculator
18446744073709551615 needs exactly 64 bits, and decimal 13, binary 1101, needs 4. Type any non-negative whole number, however long, and get the minimum count of…
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⚙️ Developer UtilitiesFree
Double-precision float to bits
See exactly how a computer stores a decimal as a 64-bit double: 1 becomes 3FF0000000000000, with sign bit 0, exponent 1023 and 52 zero mantissa bits.
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⚙️ Developer UtilitiesFree
Morton Code Decoder
Enter one Morton number and get back the two coordinates packed inside it: 39 decodes to x 3 and y 5.
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🖼️ ImagesFree
RGB565 color packer
Turn 255, 128, 0 into the RGB565 value 64512, or 0xFC00, and see that it really displays as 255, 130, 0.
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⚙️ Developer UtilitiesFree
Saturating integer add calculator
Add two integers and keep the sum inside a fixed bit width: 100 + 50 in a signed 8-bit word gives 127 instead of wrapping to a negative number, with the exact…
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⚙️ Developer UtilitiesFree
Fractional base converter
Decimal 0.1 is 0.0(0011) in binary: a cycle of 4 digits that repeats forever, not a rounded bit. Convert any fraction between bases 2 and 16, with the repeating…
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⚙️ Developer UtilitiesFree
CIDR usable hosts calculator
192.168.1.37/24 belongs to 192.168.1.0/24, a block of 256 addresses with 254 usable hosts once the network and broadcast are reserved.
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⚙️ Developer UtilitiesFree
CIDR prefix to subnet mask converter
/24 becomes subnet mask 255.255.255.0 and wildcard mask 0.0.0.255, covering 256 addresses. Enter any IPv4 prefix length from 0 to 32 and get the dotted-decimal…
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➗ MathFree
Integer parity checker
Count the ones in a number's binary form and get its parity: 13 is 1101, with three ones, so its parity is odd and the parity bit is 1.
A
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⚙️ Developer UtilitiesFree
IPv4 address class calculator
Type an IPv4 address and get its classful category from the first octet: 192.168.1.10 is class C, with leading bits 110, default mask 255.255.255.0 and the…
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⚙️ Developer UtilitiesFree
IPv4 to hexadecimal converter
Turn a dotted IPv4 address into hex and binary, octet by octet: 192.168.1.10 becomes C0.A8.01.0A, or C0A8010A in one piece, and…
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⚙️ Developer UtilitiesFree
LEB128 Varint Decoder
Decode an unsigned LEB128 varint into its exact number: the bytes E5 8E 26 give 624485. Paste hex or decimal bytes, and incomplete or overlong sequences are…
B
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➗ MathFree
Fast modular exponentiation calculator
Get the exact remainder of a huge power without overflow: 2 to the power 10 modulo 1000 is 24, and 3 to the power 5 modulo 13 is 9.
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⚙️ Developer UtilitiesFree
Prefix length to address count calculator
An IPv4 /24 holds 256 addresses and an IPv6 /64 exactly 18,446,744,073,709,551,616. Choose the address family, enter the number after the slash and get the…
K
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⚙️ Developer UtilitiesFree
IP range to CIDR calculator
Enter a first and last IPv4 address and get the fewest CIDR blocks that cover exactly that range: 192.168.1.13 to 192.168.1.20 becomes four blocks, with no…
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⚙️ Developer UtilitiesFree
IPv4-mapped IPv6 converter
Enter 192.0.2.1 and get every common way to write it inside IPv6: ::ffff:192.0.2.1 and ::ffff:c000:201 for the mapped form, ::192.0.2.1 and ::c000:201 for the…
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⚙️ Developer UtilitiesFree
IPv6 address expander
Paste a shortened IPv6 address and get its full form: 2001:db8::1 expands to 2001:0db8:0000:0000:0000:0000:0000:0001, with every zero group restored and each of…
A
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⚙️ Developer UtilitiesFree
IPv6 prefix checker
See at once whether an IPv6 address falls inside a prefix, such as 2001:db8:1234:abcd::42 inside 2001:db8:1234::/48, along with the block's first and last…
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⚙️ Developer UtilitiesFree
Next or previous IP address calculator
Get the IPv4 address one step ahead or one step behind: after 192.168.0.255 comes 192.168.1.0, never an impossible 256.
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⚙️ Developer UtilitiesFree
Complexity crossover point calculator
With 1·n² against 10·n log n, the quadratic algorithm stays cheaper until n reaches 59, where the n log n one takes over.
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📏 Unit convertersFree
Data rate unit converter
Convert data rates without mixing up bits and bytes: 100 Mbps is 12.5 MB/s, and every result says whether decimal or binary prefixes were used.
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⚙️ Developer UtilitiesFree
IP address version detector
Paste an address and learn whether it is a complete IPv4, a complete IPv6 or neither: 192.168.1.42 comes back as valid IPv4.
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⚙️ Developer UtilitiesFree
Linear Search Average Comparisons Calculator
Find how many comparisons a linear search makes on average when the target is present: with 100 elements it is 50.5, from the formula (n + 1) / 2, and the worst…
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⚙️ Developer UtilitiesFree
MAC address type analyzer
Paste a MAC address and see what its first octet says: 02:42:AC:11:00:02 starts with 00000010 in binary, so it is unicast and locally administered.
K
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⚙️ Developer UtilitiesFree
Merge Sort Comparisons Calculator
See how many comparisons merge sort really makes: 8 elements need at most 17 and 15.733333 on average across 3 merge levels, while the familiar n log2 n gives…
K
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⚙️ Developer UtilitiesFree
TCP window size for throughput
100 Mbps over a 50 ms round trip needs 625,000 bytes in flight, far beyond the classic 65,535-byte TCP window: enter your target speed and RTT to get the window…
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⚙️ Developer UtilitiesFree
WiFi channel frequency calculator for 2.4 GHz and 5 GHz
Channel 6 in the 2.4 GHz band is centered on 2437 MHz and channel 11 on 2462 MHz: 25 MHz apart, with no shared spectrum.
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⚙️ Developer UtilitiesFree
Amdahl's Law Speedup Calculator
With 95% parallel work, 16 processors speed a job up just over 9 times, not 16, and nearly half of the new runtime is still serial.
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⚙️ Developer UtilitiesFree
Hash bits for collision resistance
Storing 1,000,000 items with at most a one-in-a-million chance of any collision takes 59 bits of hash, the smallest width that meets the birthday bound.
A
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⚙️ Developer UtilitiesFree
Hash table load factor calculator
Enter 600 items in 800 buckets and get a load factor of 0.75, or 75%: at the default 0.75 threshold a resize is advised, and 801 buckets is the minimum to drop…
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⚙️ Developer UtilitiesFree
Binary Heap Children Index Calculator
Enter a node's index and choose the numbering: in a zero-based heap, node 5 has its children at 11 and 12, from the rules 2i + 1 and 2i + 2.
B
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⚙️ Developer UtilitiesFree
Huffman code length calculator
Enter the frequencies 5, 9, 12, 13, 16 and 45 and get optimal Huffman code lengths of 4, 4, 3, 3, 3 and 1: 224 bits in total and 2.24 bits per symbol on…
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⚙️ Developer UtilitiesFree
Recursion tree node count calculator
Count the nodes of a divide-and-conquer recursion tree level by level: two half-size subproblems starting from 16 give 5 levels of 1, 2, 4, 8 and 16 nodes, 31…
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⚙️ Developer UtilitiesFree
Required operations per second calculator
Work out the throughput a job needs to finish on time: 2,500,000 operations in five seconds need 500,000 operations per second.
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⚙️ Developer UtilitiesFree
Row-major array index calculator
In a 3 × 4 × 5 array of 8-byte elements, position 1, 2, 3 is element 33, byte offset 264, address 4360 from a base of 4096.
K
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⚙️ Developer UtilitiesFree
Balanced brackets validator
Paste code or text and see at once whether every (, [ and { closes in the right order: ({[]}) passes, ([)] fails, and the first mismatch is pinpointed with its…
K
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⚙️ Developer UtilitiesFree
Binary tree max nodes calculator
A perfect binary tree of height 3 holds 15 nodes, 8 of them leaves, with 1, 2, 4 and 8 nodes on its four levels.
A
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⚙️ Developer UtilitiesFree
Code comment line counter
Measure how much of a source file explains rather than runs: a six-line snippet with three comment lines and three code lines gives a ratio of 1, with comments…
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➗ MathFree
Edge list to adjacency matrix converter
Turn an edge list into an adjacency matrix with the node order spelled out: the three lines A B, B C and C A give a symmetric 3 by 3 matrix with zeros on the…
F
Runs in your browser
➗ MathFree
Graph vertex degree calculator
Paste an edge list and get each vertex's degree: in the triangle A→B, B→C, C→A every vertex has in-degree 1, out-degree 1 and degree 2, and the degrees add up…
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✍️ Text & AIFree
English word pluralizer
Get the correct English plural of a noun and the rule behind it: child becomes children, city becomes cities and box becomes boxes.
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