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Significant Figures Calculator

Round any number to a chosen number of significant figures.

Pregnancy Due Date Calculator

Estimate a pregnancy due date and gestational age.

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Moon Phase

See the moon phase for any date.

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Day of the Year

See which day of the year a date falls on.

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Week Number Calculator

Find the ISO week number for any date.

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Current Season Finder

Find out what season a date falls in.

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Gasoline vs Ethanol Calculator

Find out which fuel is the better value for a flex-fuel car.

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