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Everyday Calculators
Time, dates, conversions and useful day-to-day tools.
Age Calculator
Calculate your age from date of birth instantly.
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Chronological Age Calculator
Exact chronological age in years, months and days for school and clinical use.
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Date Calculator
Add or subtract days, weeks, months and years, or find the days between two dates.
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GPA Calculator
Credit-weighted GPA calculator on the US 4.0 scale, with an optional prior-GPA mode for cumulative GPA.
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Numerology Life Path Number Calculator
Find your numerology life path number from your birthdate, with the step-by-step reduction and your number’s meaning.
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Half Birthday Calculator
Find your half birthday — exactly six months from your birthday — with a countdown, your half age and fun facts.
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Tip Calculator
Calculate tip amount, total bill and per-person split instantly. Quick-select 15%, 18%, 20% or 25% tip with a reverse mode.
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Hours Calculator
Calculate total hours and minutes worked from start and end times with an optional break deduction.
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Time Duration Calculator
Find the exact duration between two dates and times in years, months, days, hours, minutes and seconds.
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Grade Calculator
Calculate your weighted grade percentage and letter grade from assignment scores, with a final exam estimator.
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Sleep Calculator
Find optimal bedtimes or wake-up times based on 90-minute sleep cycles for the best rest.
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Love Compatibility Calculator
Fun love compatibility score from two names with an optional birthdate match and a lighthearted reading.
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