Time-Math Guides

Learn how to add hours, minutes and seconds together without converting to decimals — and avoid the most common mistakes.

Find out how many days, weeks, months or hours separate two points in time — useful for deadlines, billing periods, and project planning.

A practical reference for converting seconds to minutes, minutes to hours, hours to days, and beyond — with worked examples.

Common time calculations for daily life — countdowns, age calculations, meeting planning, and travel time.