Fast, clear calculators for everyday math.

Free calculators for time, money, school, health, and conversions — clear results, no clutter.

Holiday countdownsUpcoming holidays

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Halloween

Auto-rotates by date · days counted in your local time

Time & Date

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Time Calculator

Add or subtract work hours and minutes — timesheets, shifts, duration.

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Date Calculator

Add days, weeks, or months to any date.

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Days Between Dates

Count days, weeks, months, and business days between two dates.

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Money & Salary

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Hourly to Salary

Convert an hourly wage to yearly pay before tax.

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Car Payment Calculator

Estimate a US auto loan payment, interest, and total cost.

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School

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Percentage Calculator

Find percents, reverse percents, and percent change.

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Grade Calculator

Weighted grades and what you need on the final.

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GPA Calculator

Term and cumulative GPA on a 4.0 scale.

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Health

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Calorie Calculator

Daily calorie targets with Mifflin-St Jeor.

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Converters

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Fahrenheit to Celsius

°F ↔ °C with common temps.

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