Disclaimer

Check important results

Every tool is tested, but no calculator can know your exact situation. Before you rely on a result for something that matters — a purchase, a building project, a deadline, an exam grade, a contract — check it independently or with a qualified person.

Rounding and assumptions

Results are displayed rounded (usually to 10 significant digits, or to the precision you choose). Each page states the assumptions it makes, such as whether a date count includes the end date, or whether a volume is in US or imperial units. Read those notes before using a result.

Not professional advice

Nothing on CalcoraBase is financial, tax, legal, engineering or medical advice. Money-related tools — including the interest, loan, savings, margin, discount, markup, tip and sales tax calculators — perform arithmetic only. Tax rates and rules vary by place and change over time; always use the rate that applies to you.

Interest and loan figures

Interest and loan calculators assume a fixed rate, the compounding you choose and no fees, charges or taxes. Real products can differ: a lender’s legally disclosed APR includes certain fees, payment dates and day-count rules shift figures slightly, and savings and investment returns are not guaranteed. The provider’s official documents always take precedence over these results.

Dates and times

Date and time tools use your device’s clock and calendar settings and the Gregorian calendar. Business-day counts treat Saturday and Sunday as weekends and only exclude the holidays you enter; official working days may differ by country, region and employer.

Errors

If you find an error, please report it so it can be fixed for everyone.