IT Calculators
Conversions, network, storage, performance and developer tools.
Conversions and formats
Caesar cipher calculator
Caesar cipher: ABC at 1 is BCD. HELLO at 3 is KHOOR.
Use calculator →Morse Code Translator
Morse code translator: SOS is ... --- ... . HELLO is .... . .-.. .-.. --- .
Use calculator →Word counter calculator
Word counter: paste text and see words and characters at once.
Use calculator →ASCII / Unicode
ASCII / Unicode: a character or a short string.
Use calculator →Base64 size
Base64 size: bytes and a mode.
Use calculator →Binary / Hex / Decimal
Binary / Hex / Decimal: a value and a base.
Use calculator →Checksum calculator
Checksum: text.
Use calculator →Cron Schedule Calculator
Cron Schedule Calculator: runs / day = matches in 1440 minutes from 5 fields.
Use calculator →Duration
Duration: 1h 30m, 45m, or 2:15:00.
Use calculator →Hash Collision Probability Calculator
Hash Collision Probability Calculator: n and bits.
Use calculator →HEX ↔ RGB Color Converter
HEX ↔ RGB Color Converter: HEX or RGB.
Use calculator →Memory units
Memory units: a value, from, and to.
Use calculator →PX ↔ REM Converter
PX ↔ REM Converter: px or rem and a root.
Use calculator →Timezone converter
Timezone converter: a date, a time, and zones.
Use calculator →Unix Timestamp Converter
Unix Timestamp Converter: a stamp or ISO.
Use calculator →URL Encode / Decode
URL Encode / Decode: text and a mode.
Use calculator →Network
DHCP Range Calculator
DHCP Range Calculator: an address, CIDR, and reserve.
Use calculator →DNS TTL Calculator
DNS TTL: 86400 and 300 mean a 24 h wait before the record change.
Use calculator →IP Subnet / CIDR Calculator
IP Subnet / CIDR Calculator: an IPv4 address and a CIDR prefix.
Use calculator →IPv6 Shorthand Calculator
IPv6 Shorthand Calculator: RFC 5952: strip leading zeros, one :: on the longest zero run.
Use calculator →Latency vs distance
Latency vs distance: km, a medium, and overhead.
Use calculator →MTU and IP Fragmentation
MTU and IP Fragmentation: packet, MTU, and header.
Use calculator →Storage and performance
Autoscaling (POD)
Autoscaling (POD): min, max, and a scale percent.
Use calculator →Backup window
Backup window: GB and throughput.
Use calculator →Bandwidth cost
Bandwidth cost: GB, a price, and free GB.
Use calculator →Bundle size
Bundle size: the source size and kb or mb.
Use calculator →Cache Hit Ratio Calculator
Cache Hit Ratio Calculator: hits and misses.
Use calculator →Cloud storage cost
Cloud storage cost: GB, a price per GB, and a free tier.
Use calculator →Compression ratio
Compression ratio: size before and after.
Use calculator →Data Transfer Time Calculator
Data Transfer Time Calculator: MB, Mbps, and efficiency.
Use calculator →Database Connections Calculator
Database Connections Calculator: cores, instances, and an optional cap.
Use calculator →File Download Time Calculator
File Download Time Calculator: size, unit, speed, and Mbps.
Use calculator →IOPS and disk throughput
IOPS and disk throughput: ms, block KB, and parallelism.
Use calculator →JSON size
JSON size: characters, a model, and overhead.
Use calculator →JWT token
JWT token: characters or bytes.
Use calculator →Log storage
Log storage: bytes per entry, count, compression, and days.
Use calculator →PSU calculator
PC power supply: CPU TDP, GPU, and the rest.
Use calculator →Percentiles
Percentiles: a value, a percentile, and an optional baseline.
Use calculator →Queue depth
Queue depth: depth and latency.
Use calculator →RAID Capacity Calculator
RAID Capacity Calculator: disk count, size, and level.
Use calculator →Replication lag
Replication lag: a segment and hops.
Use calculator →Resolution and PPI
Resolution and PPI: width, height, and a diagonal.
Use calculator →Storage cost
Storage cost: GB, a price, and months.
Use calculator →Throughput (MB/s)
MB/s from IOPS and the I/O block size, not a fio run.
Use calculator →Uptime and downtime
Uptime and downtime: a percent.
Use calculator →Other
API Rate Limit Calculator
API Rate Limit Calculator: a limit, a unit, and a window.
Use calculator →Break-even: cloud vs on-premise
Break-even: cloud vs on-premise: a cloud month, on-prem capex, and optional opex.
Use calculator →Cost Per Request Calculator
Cost Per Request Calculator: a price per million and a request count.
Use calculator →SSL Certificate Expiry
SSL Certificate Expiry: an expiry date.
Use calculator →Deploy frequency
Deploy frequency: deploys and days.
Use calculator →Error Budget Calculator (SRE)
Error Budget Calculator (SRE): SLO, period days, and used minutes.
Use calculator →MTTR & MTBF Calculator
MTTR & MTBF Calculator: total repair hours, failures, and optional MTBF.
Use calculator →Password Entropy Calculator
Password Entropy Calculator: a length and a charset.
Use calculator →Retry backoff
Retry backoff: a base, an attempt, and a multiplier.
Use calculator →SSL Certificate Validity
SSL Certificate Validity: notBefore and notAfter.
Use calculator →Throughput (MB/s z IOPS)
Opens the moved IOPS-to-MB/s card (same block-size math).
Use calculator →