Newest Calculators

Construction and Home

Roofing Calculator

Roofing Calculator estimates roof area, squares, shingle bundles, pitch, waste and material cost so you can plan accurately and avoid costly overbuying.

Open calculator

Construction and Home

Flooring Calculator

Free flooring calculator to estimate floor area, material waste, boxes needed, total cost, and project budget for any room.

Open calculator

Construction and Home

Wallpaper Calculator

Use this wallpaper calculator to estimate rolls, coverage, waste, and total wallpaper cost for any room quickly and accurately.

Open calculator

Construction and Home

Gravel Calculator

Free gravel calculator to estimate how many tons or cubic yards of gravel you need and the total cost for your driveway, patio, or landscaping project.

Open calculator

Construction and Home

Fence Calculator

Use this fence calculator to estimate fence length, posts, panels, gates, and project cost for wood, vinyl, chain link, or metal fencing.

Open calculator

Education

GPA Calculator

Calculate your GPA using course grades and credit hours. Find semester or cumulative GPA instantly on the standard 4.0 scale with this free GPA calculator.

Open calculator

Education

Grade Calculator

Calculate your weighted grade using assignment, quiz and exam scores. Get your final course percentage and letter grade instantly with this free grade calculator.

Open calculator

Unit Converters

Length Converter

Convert meters, feet, miles, inches, kilometers, centimeters, yards and more with this free, fast and accurate online length converter.

Open calculator

Date and Time

Week Number Calculator

Find the week number for any date, including ISO week, week start day, year week, and days left in the selected week.

Open calculator

Date and Time

Date Add/Subtract Calculator

Add or subtract days, weeks, months, and years from any date with this simple Date Add/Subtract Calculator.

Open calculator

Date and Time

Time Duration Calculator

Calculate time duration between two dates or times in hours, minutes, days, and seconds with this simple Time Duration Calculator.

Open calculator

Date and Time

Time Card Calculator

Calculate weekly work hours, breaks, overtime, and total pay with this easy professional time card calculator.

Open calculator

Date and Time

Time Zone Converter

Convert time between cities and time zones instantly. Plan meetings, calls, travel, and global schedules with accurate time zone results.

Open calculator

Date and Time

Countdown Calculator

Use this Countdown Calculator to count days, hours, minutes and seconds until any event, deadline, birthday or special date.

Open calculator

Date and Time

Date Difference Calculator

Use this Date Difference Calculator to find days, weeks, months, and years between two dates with a clean and accurate result.

Open calculator

Date and Time

Age Calculator

Use our free Age Calculator to find your exact age in years, months, days, weeks, hours, and minutes with birthday countdown.

Open calculator

Health and Fitness

Protein Intake Calculator

Calculate your daily protein intake by weight, goal, activity, and meals. Get grams per day, calories from protein, and meal targets instantly.

Open calculator

Education

Final Exam Calculator

Use this Final Exam Calculator to find the score you need on your final exam to reach your desired overall course grade.

Open calculator

Education

College GPA Planner

Plan your college GPA, calculate semester grades, credits, cumulative GPA, and target GPA with this easy College GPA Planner tool.

Open calculator

Health and Fitness

One Rep Max Calculator

Use this One Rep Max Calculator to estimate your maximum lift, training percentages, and strength levels for smarter workout planning.

Open calculator

Health and Fitness

Pace Calculator

Use this pace calculator to find running pace, finish time, or distance for races, training, marathons, and fitness goals.

Open calculator

Health and Fitness

Ovulation Calculator

Use this ovulation calculator to estimate your fertile window, ovulation date, and next period based on your cycle details.

Open calculator

Health and Fitness

Heart Rate Calculator

Use this Heart Rate Calculator to find your maximum heart rate, target heart rate zones, and workout intensity levels by age.

Open calculator

Health and Fitness

Water Intake Calculator

Calculate how much water you should drink daily based on your weight, activity level and climate. Get your recommended water intake in liters and cups.

Open calculator