Calculators and Unit Convertors
Math tools and unit convertors in one section. Money, health, and everyday math sit with length, weight, temperature, color, and number bases. Each tool keeps its current address.
Results are for checking and planning. Health and money calculators give estimates, not medical or financial advice.
Time Zone Converter, Unix Timestamp Converter, and Age Calculator are listed here because their folders stay put. They are also listed on Calendars and Time, which is the section for clocks, months, and dates.
Calculators
Percentage Calculator
Percent of a number, percent change, and percent difference.
Mortgage Calculator
A payment estimate with taxes, insurance, and PMI.
Compound Interest Calculator
Shows how savings grow with regular contributions.
Tip Calculator
Splits a bill between people.
Scientific Calculator
Statistics, matrices, and graphing.
Random Number Generator
Draws numbers in a range you set.
Prime Number Checker
Tests a number and shows its factors.
Fibonacci Generator
Builds a Fibonacci sequence.
Calorie Calculator
Estimates daily calorie needs. It is not a diet plan.
BMI Calculator
A screening number, not a diagnosis.
Sleep Calculator
Plans around average 90-minute cycles.
Age Calculator
Counts the time between two dates. Also listed with Calendars and Time.
Unit Convertors
Metric to Standard
Several kinds of measurement on one page.
Temperature Converter
Fahrenheit, Celsius, and Kelvin.
Liters to Gallons
Separates US and UK gallons.
Length Converter
Inches, feet, meters, and other length units.
Weight Converter
Pounds, kilograms, and other weights.
Time Zone Converter
Compares places and handles daylight saving time. Also listed with Calendars and Time.
Unix Timestamp Converter
Turns computer date numbers into readable dates. Also listed with Calendars and Time.
Color Converter (HEX/RGB/HSL)
Translates color values and checks contrast.
Speed Converter
Miles per hour, kilometers per hour, and other speeds.
Area Converter
Square feet, acres, and other areas.
Volume Converter
Cups, liters, and other volumes.
Number Base Converter
Binary, octal, decimal, and hexadecimal.