Other Tools & Calculators
Free everyday utility calculators for dates, time, education, construction, and more. Simple tools that make life easier.
47 free calculators organized by category
Date & Time
Calculate dates, times, and durations
Age Calculator
Calculate exact age in years, months, and days between two dates.
Date Calculator
Add or subtract days, weeks, months, or years from any date.
Time Calculator
Add or subtract hours, minutes, and seconds. Convert between time formats.
Hours Calculator
Calculate total work hours and time between two times.
Time Card Calculator
Calculate total hours for timesheets and payroll.
Time Zone Calculator
Convert time between different time zones worldwide.
Time Duration Calculator
Calculate duration between two times or dates.
Day Counter
Count the number of days between two dates.
Day of Week Calculator
Find what day of the week any date falls on.
Sleep Calculator
Find the best time to sleep or wake up based on sleep cycles.
Education
Academic calculators for students
GPA Calculator
Calculate your GPA based on grades and credit hours. Supports different grading scales.
Grade Calculator
Calculate course grades and weighted averages for assignments.
College Cost Calculator
Estimate total college costs including tuition and expenses.
Construction
Calculate materials and measurements for building projects
Concrete Calculator
Calculate concrete needed for slabs, footings, columns, and stairs.
Square Footage Calculator
Calculate area for rooms, flooring, and construction projects.
Stair Calculator
Calculate stair dimensions including rise, run, and stringers.
Roofing Calculator
Calculate roofing materials needed for your project.
Tile Calculator
Calculate number of tiles needed for flooring or walls.
Mulch Calculator
Calculate mulch needed for landscaping projects.
Gravel Calculator
Calculate gravel or aggregate needed for projects.
Electronics
Electrical and network calculators
Voltage Drop Calculator
Calculate voltage drop for wire sizing and electrical projects.
Resistor Calculator
Calculate resistance values and color codes for resistors.
Ohms Law Calculator
Calculate voltage, current, resistance using Ohms Law (V=IR).
Electricity Calculator
Calculate electricity costs and energy consumption for appliances.
BTU Calculator
Calculate heating and cooling requirements in BTUs.
Bandwidth Calculator
Calculate network bandwidth requirements and speeds.
IP Subnet Calculator
Calculate IP address ranges and subnet masks.
Automotive
Vehicle-related calculators
Fuel Cost Calculator
Calculate fuel costs for trips based on distance and fuel prices.
Gas Mileage Calculator
Calculate fuel efficiency and MPG for vehicles.
Mileage Calculator
Calculate travel distance and mileage for trips.
Horsepower Calculator
Calculate engine horsepower and performance metrics.
Tire Size Calculator
Compare tire sizes and calculate speedometer differences.
Weather
Weather and temperature calculators
Wind Chill Calculator
Calculate apparent temperature based on wind speed and temperature.
Heat Index Calculator
Calculate heat index based on temperature and humidity.
Dew Point Calculator
Calculate dew point from temperature and humidity.
Science
Scientific calculators for physics and chemistry
Density Calculator
Calculate density from mass and volume.
Speed Calculator
Calculate speed, velocity, distance, or time.
Mass Calculator
Calculate mass from density and volume.
Molarity Calculator
Calculate molarity and solution concentrations.
Molecular Weight Calculator
Calculate molecular weight of chemical compounds.
Lifestyle
Everyday life calculators and tools
Tip Calculator
Calculate tips and split bills easily. Includes preset tip percentages.
Height Calculator
Convert height between feet/inches and centimeters.
Shoe Size Converter
Convert shoe sizes between US, UK, EU, and other systems.
Bra Size Calculator
Calculate proper bra size from measurements.
Password Generator
Generate secure random passwords with customizable settings.
Dice Roller
Roll virtual dice for games and random number generation.
Golf Handicap Calculator
Calculate your golf handicap index from recent scores.
Simple Tools for Everyday Tasks
Save Time
Quick calculations without searching for formulas or downloading apps.
Accurate Results
Reliable calculations you can trust for important decisions.
Always Available
Works on any device with a web browser. No installation needed.