Date & Other
Time Zone Converter
Convert a date and time between world time zones, with the exact time difference.
IP Subnet Calculator
Calculate the network, broadcast, mask, host range and host count for any IPv4 address and CIDR.
Base64 & URL Encoder / Decoder
Encode or decode text with Base64 and URL encoding, right in your browser.
Age Calculator
Calculate your exact age in years, months and days.
Date Difference Calculator
Count the days, weeks and months between two dates.
Length Converter
Convert between meters, kilometers, miles, feet and inches.
Temperature Converter
Convert between Celsius, Fahrenheit and Kelvin.
Speed Calculator
Calculate average speed from distance and time.
Roman Numeral Converter
Convert numbers to Roman numerals (1β3999).
Height Converter
Convert height between centimeters and feet/inches.
Fuel Cost Calculator
Estimate the fuel cost of a trip.
Density Calculator
Calculate density, mass or volume.
Gas Mileage Calculator
Calculate your vehicle's fuel economy.
Day Counter Calculator
Add or subtract days from a date.
Weight Converter
Convert between kilograms, grams, pounds and ounces.
Square Footage Calculator
Calculate the area of a room in square feet and meters.
BTU Calculator (AC)
Estimate the cooling BTU needed for a room.
GPA Calculator
Calculate your grade point average from grades and credits.
Hours Calculator
Calculate hours worked between a start and end time.
Sleep Calculator
Find the best bedtimes for your wake-up time using sleep cycles.
Love Calculator
A fun compatibility score between two names.
Wind Chill Calculator
Calculate how cold it feels with wind (wind chill).
Heat Index Calculator
Calculate how hot it feels with humidity (heat index).
Time Calculator
Add or subtract hours, minutes and seconds.
Horsepower Calculator
Calculate horsepower from torque and RPM.
Concrete Calculator
Calculate the concrete volume needed for a slab.
Tile Calculator
Find how many tiles you need for a floor or wall.
Ohm's Law Calculator
Solve for voltage, current, resistance or power.
Electricity Cost Calculator
Estimate the running cost of an electrical appliance.
Dew Point Calculator
Calculate the dew point from temperature and humidity.
Stair Calculator
Calculate the number of steps and rise for a staircase.
Gravel Calculator
Calculate the volume and weight of gravel needed.
Random Number Generator
Generate random numbers within a range.
Dice Roller
Roll any number of dice with any number of sides.
Password Generator
Generate a strong random password.
Day of the Week Calculator
Find the day of the week for any date.
Mulch Calculator
Calculate how much mulch you need for a garden bed.
Roofing Calculator
Estimate roof area from the building footprint and pitch.
Grade Calculator
Find the final exam score you need for a target grade.
Molarity Calculator
Calculate the molar concentration of a solution.
Time Duration Calculator
Find the duration between two dates and times.
Mileage Reimbursement Calculator
Calculate travel reimbursement from distance and rate.
Paint Calculator
Find how much paint you need for a room.
Flooring Cost Calculator
Estimate the cost to floor a room.
Unit Price Calculator
Find the price per unit to compare products.
Tire Size Calculator
Calculate the overall diameter of a tire from its size.
Wallpaper Calculator
Find how many rolls of wallpaper you need.
Aspect Ratio Calculator
Simplify a width-to-height ratio for screens and images.
Voltage Drop Calculator
Estimate the voltage drop along a cable run.
Steps to Distance Calculator
Convert step count into distance and calories.
Cooking Volume Converter
Convert between cups, milliliters, tablespoons and teaspoons.
Speed Converter
Convert between km/h, mph, m/s and knots.
Data Storage Converter
Convert between bytes, KB, MB, GB and TB.
Area Converter
Convert between square meters, square feet, acres and hectares.
Pressure Converter
Convert between Pa, bar, psi, atm and mmHg.
Energy Converter
Convert between joules, calories, watt-hours and BTU.
Volume Converter
Convert between liters, milliliters and gallons.
Angle Converter
Convert between degrees, radians and gradians.
Power Converter
Convert between watts, kilowatts, horsepower and BTU/h.
Fuel Consumption Converter
Convert between L/100km, MPG and km/L.
Download Time Calculator
Estimate how long a file takes to download.
Torque Converter
Convert between newton-meters, pound-feet and kg-meters.
Force Converter
Convert between newtons, pound-force and kilogram-force.
Number to Words Converter
Spell out a number in words, in your chosen language.
Pace Converter
Convert running pace between per-kilometer and per-mile.
Brick Calculator
Estimate how many bricks you need for a wall.
Time to Decimal Calculator
Convert hours and minutes into decimal hours.
Wavelength Calculator
Calculate the wavelength of a wave from its frequency.
Weight on the Moon Calculator
Find how much you would weigh on the Moon and Mars.