Calculators
BMI, percentages, units, networking, and everyday math.
15 tools in this category
Available tools
Calculators tools
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Base Converter
Convert between binary, octal, decimal, and hex.
BMI Calculator
Calculate BMI and an estimated healthy weight range.
Percentage Calculator
Solve everyday percentage and rate-of-change problems.
Unit Converter
Convert length, weight, and temperature units.
Sales Tax Calculator
Calculate tax-inclusive and tax-exclusive prices.
Loan Calculator
Simulate monthly and total repayment for a loan.
CIDR Calculator
Work out network address, broadcast, mask, and host count.
IPv4 Range Expander
Expand an IP range or CIDR block into every address.
Subnet Calculator
Split a network into subnets by count or host requirement.
Chmod Calculator
Convert file permissions between octal, symbolic, and checkboxes.
IBAN Validator
Validate an IBAN's format and mod-97 checksum.
IPv4 Converter
Convert an IPv4 address between dotted, integer, hex, and binary.
MAC Address Generator
Generate a random MAC address with configurable OUI.
IPv6 ULA Generator
Generate an RFC 4193 unique local IPv6 address.
Random Port Generator
Generate non-repeating random port numbers in a chosen range.
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