Other Calculators
Explore useful calculators for age, dates, time, fuel costs, tips, grades, conversions, and other everyday calculations.
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Age Calculator
Calculate your exact age in years, months, and days from your date of birth.
Date Calculator
Calculate the number of days between two dates, or add/subtract days from a date.
Time Calculator
Add or subtract hours, minutes, and seconds. Convert between time units.
Hours Calculator
Calculate total work hours and pay for a given time period.
Fuel Cost Calculator
Calculate the fuel cost and consumption for a trip in metric or imperial units.
Tip Calculator
Calculate tip amount and total bill per person for any service.
GPA Calculator
Calculate your GPA from individual course grades and credit hours.
Grade Calculator
Calculate your final course grade based on weighted assignments and scores.
Password Generator
Generate strong, random passwords with customizable length and character sets.
Conversion Calculator
Convert between common units: length, weight, temperature, volume, and more.
Time Duration Calculator
Calculate the duration between two times in hours and minutes.
Day Counter
Count the number of calendar days between two dates.
Day of the Week Calculator
Find out what day of the week a specific date falls on.
Time Zone Calculator
Convert time between different global time zones.
Date Add/Subtract Calculator
Add or subtract years, months, weeks, and days from a date.
Business Days Calculator
Calculate the number of business working days between two dates.
Sleep Calculator
Calculate optimal bedtimes and wake up times based on sleep cycles.
Distance Calculator
Calculate distance from speed and time.
Speed Calculator
Calculate speed from distance and time.
Density Calculator
Calculate density from mass and volume.
Mass Calculator
Calculate mass from density and volume.
Weight Calculator
Calculate weight (force) from mass and gravity.
Roman Numeral Converter
Convert between standard numbers (1-3999) and Roman numerals.
Voltage Drop Calculator
Calculate voltage drop, remaining voltage, and percentage over a distance.
BTU Calculator
Estimate heating and cooling load in BTUs for a room based on dimensions and insulation.
Resistor Calculator
Read 4-band and 5-band resistor color codes to calculate resistance and tolerance.
Ohm's Law Calculator
Calculate voltage, current, or resistance using Ohm's Law (V = I * R).
Electricity Calculator
Calculate electrical energy consumption and cost based on power and usage time.
Horsepower Calculator
Calculate horsepower from torque and RPM, or torque from horsepower and RPM.
Engine Horsepower Calculator
Estimate crank horsepower from wheel horsepower using drivetrain loss percentage.
Square Footage Calculator
Calculate the area in square footage for standard shapes: rectangle, triangle, circle.
Stair Calculator
Estimate stair dimensions, number of risers, and riser height for dimensional planning.
Roofing Calculator
Estimate roof surface area based on building dimensions and roof pitch.
Tile Calculator
Calculate the number of tiles needed to cover an area, including a waste factor.
Mulch Calculator
Estimate the volume of mulch or soil needed for a given area and depth.
Gravel Calculator
Estimate gravel volume and weight required for a project based on area, depth, and density.
Tire Size Calculator
Calculate tire dimensions including overall diameter and circumference from standard tire notation.
Mileage Calculator
Calculate fuel efficiency in MPG (US/Imperial) and L/100km from distance and fuel used.