Practical, daily tools
Everyday
Ages, dates, grades, tips, fuel costs, and home projects — the tools you reach for daily.
Age Calculator
Calculate exact age in years, months, and days between two dates.
Date Calculator
Add or subtract days from a date, or count days between dates.
Hours Calculator
Count hours between two times — great for timesheets.
GPA Calculator
Calculate your GPA from course grades and credit hours.
Grade Calculator
Find your course grade and what you need on the final.
Time Calculator
Add and subtract hours, minutes, and seconds.
Day Counter
Count days, weeks, and months between two dates, with business-day option.
Time Duration Calculator
Find the exact duration between two times or dates.
Tip Calculator
Calculate the tip and split the bill between any number of people.
Discount Calculator
Find the sale price and savings after any discount.
Fuel Cost Calculator
Estimate the fuel cost of any trip from distance and MPG.
Gas Mileage Calculator
Calculate your vehicle's real MPG between fill-ups.
Mileage Reimbursement Calculator
Calculate reimbursement for business miles at the IRS rate.
Square Footage Calculator
Measure square footage of rooms and irregular spaces.
Concrete Calculator
Estimate concrete volume and bags needed for slabs and footings.
Paint Calculator
Work out how many gallons of paint a room needs.
Tile Calculator
Estimate tiles and boxes needed for a floor or wall.
Electricity Cost Calculator
Calculate what an appliance costs to run per day, month, and year.
Sleep Calculator
Find the best bedtime or wake-up time based on sleep cycles.
Unit Converter
Convert length, weight, temperature, volume, and more.
Speed Distance Time Calculator
Solve for speed, distance, or travel time from the other two.
Bill Split Calculator
Split a bill with tax and tip across any group size.
Unit Price Calculator
Compare two package sizes by true price per unit.
Cooking Measurement Converter
Convert cups to grams for common baking ingredients.
Shoe Size Converter
Convert shoe sizes between US, UK, EU, and centimeters.
Ring Size Converter
Convert US ring sizes to millimeter diameter and EU sizes.
Wind Chill Calculator
Feel-like temperature from cold air and wind speed.
Heat Index Calculator
Feel-like temperature from heat and humidity.
Dew Point Calculator
Find the dew point — the humidity number that predicts comfort.
Commute Cost Calculator
Total the real monthly and annual cost of your commute.
Car Depreciation Calculator
Project a vehicle's value loss year by year.
Download Time Calculator
How long a file takes at your connection speed.
Password Strength Calculator
Measure password entropy and estimated crack time.
Reading Time Calculator
Estimate reading or speaking time from a word count.
PPI Calculator
Compute a screen's pixel density from resolution and size.
Aspect Ratio Calculator
Simplify aspect ratios and solve missing dimensions.
Golf Handicap Calculator
Compute a round's handicap differential under the WHS.
Party Drink Calculator
Plan how many drinks and bottles a party needs.
Mulch Calculator
Cubic yards and bags of mulch for your garden beds.
Grass Seed Calculator
Pounds of seed for a new lawn or overseeding.
Wallpaper Calculator
Rolls of wallpaper needed from wall area and roll coverage.
Fence Calculator
Panels, posts, and gates needed to run a fence line.
Stair Calculator
Riser height, tread run, and stringer length for a staircase.
Roof Pitch Calculator
Convert rise and run into pitch, angle, and slope factor.
BTU Calculator
Size an air conditioner for a room in BTUs.
EV Charging Cost Calculator
Cost to charge an EV at home and price per 100 miles vs. gas.