Technology Calculators
20 free calculators in this category. Every result is worked out in your browser — nothing you type is sent anywhere.
Backup Time Calculator
Estimate how long a backup of a given data size will take over a network, USB or cloud connection.
Open calculatorBandwidth Calculator
Estimate the total network bandwidth needed for a number of simultaneous users or devices on a connection.
Open calculatorBattery Runtime Calculator
Estimate how long a battery will last from its capacity in mAh or Wh and the device's average power draw.
Open calculatorBinary, Decimal and Hex Converter
Convert a whole number between decimal, binary, hexadecimal and octal formats, useful for programming and networking tasks.
Open calculatorComputer Electricity Cost Calculator
Estimate the running electricity cost of a computer, console or other device from its wattage, hours used and your tariff.
Open calculatorDownload Time Calculator
Work out how long a file will take to download at a given internet speed, in hours, minutes and seconds.
Open calculatorImage Aspect Ratio Calculator
Work out a proportional height or width for an image, or simplify its aspect ratio, from two known dimensions.
Open calculatorInternet Data Usage Calculator
Estimate your monthly internet data usage from daily activities like streaming, video calls and browsing.
Open calculatorIP Address Range Calculator
Calculate the first, last and total number of IPv4 addresses covered by a given network address and prefix length.
Open calculatorPassword Entropy Calculator
Estimate a password's strength in bits of entropy from its length and the character set used, plus a rough crack-time indicator.
Open calculatorRAID Storage Capacity Calculator
Estimate usable storage capacity and redundancy for common RAID levels (0, 1, 5, 6, 10) from disk size and count.
Open calculatorScreen Pixels Per Inch (PPI) Calculator
Calculate a screen's pixel density (PPI) from its resolution and diagonal size in inches.
Open calculatorScreen Resolution Megapixel Calculator
Calculate the total megapixel count and aspect ratio of a screen resolution such as 1920x1080 or 3840x2160.
Open calculatorSLA Downtime Credit Calculator
Estimate the allowed downtime and potential service credit under a provider's SLA, given the uptime target and outage duration.
Open calculatorSubnet Calculator
Work out the network address, broadcast address, subnet mask and usable host range for an IPv4 address and prefix length.
Open calculatorUnix Timestamp Converter
Convert between a Unix timestamp (seconds since 1 January 1970) and a human-readable date and time in AEST/AEDT or UTC.
Open calculatorUpload Time Calculator
Calculate how long it takes to upload a file or backup given its size and your upload speed in Mbps or MB/s.
Open calculatorVideo Bitrate Calculator
Calculate the recommended video bitrate to hit a target file size, or the resulting size from a chosen bitrate.
Open calculatorVideo File Size Calculator
Estimate the file size of a video from its bitrate and duration, useful for storage and upload planning.
Open calculatorWebsite Uptime Calculator
Convert a website or service's uptime percentage into the equivalent downtime in minutes per day, month and year.
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