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Hours Calculator
The quick hours calculator that started CalculatorWiser.
Calculate total hours and minutes between two times.
Clock Format:
Formula, example & overnight shifts
Worked minutes = end time − start time − breaks. If the end clock time is earlier, the calculator treats it as the next day.
Example: 8:00 AM to 4:30 PM is 510 minutes. Subtract a 30-minute break: 480 minutes = 8 hours.
10:00 PM to 6:00 AM is an 8-hour overnight shift. Matching start and end times mean zero hours, not 24 hours. The selected date labels your notes; it does not change the duration. This clock-time tool does not adjust for daylight-saving changes or calculate multi-day shifts.
Decimal hours = worked minutes ÷ 60. For example, 7 hours 30 minutes = 7.5 hours, not 7.30.
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Divide feet, inches and measurements into practical equal parts for projects.
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Find percentages, percentage changes and common percentage results.
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Estimate a monthly mortgage payment from home price, rate and term.
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Convert pay between hourly, weekly, monthly and annual amounts.
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📜 Dead Sea Scrolls Reading & Study Center
Read Hebrew words with English meanings, learn the alphabet, and follow guided lessons. English · Español · Türkçe.
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Explore Ancient Mathematics Across Civilizations
Travel through Maya, Babylonian, Egyptian, Greek, Roman, Chinese, Indian, Aztec/Mexica and Inca/Andean mathematics with interactive historical and educational calculators.
Maya Decimal to Vigesimal Calculator
Convert a non-negative decimal integer to Maya-style base-20 place values.
Open calculatorBabylonian Decimal to Sexagesimal Calculator
Convert a decimal whole number to sexagesimal (base 60), the place-value system used in Babylonian mathematics.
Open calculatorEgyptian Unit Fraction Decomposition Calculator
Decompose a proper fraction into a sum of distinct unit fractions using a modern greedy reconstruction inspired by Egyptian fraction notation.
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