Disclaimers

General

Results depend on the numbers you enter and the assumptions stated on each page. They are estimates, not guarantees, quotes, or professional advice. Check important numbers with a qualified professional before you act.

Money, credit, home and property, and business calculators

This is an educational estimate, not financial, tax, or lending advice. Rates, taxes, fees, and lending rules vary by lender and by place. A lender's quote or official disclosure takes priority over any number here. Guidelines such as 28/36 are common rules of thumb, not legal limits or approvals.

Health calculators

This is an educational estimate, not medical advice. Talk with a clinician about your own health. This is an educational estimate, not medical advice. BMI does not diagnose a health condition. This is an educational estimate, not medical advice. A clinician may date a pregnancy differently, for example from an ultrasound. Health calculators are for adults unless a page says otherwise. Do not use them to diagnose, treat, or decide on care.

Home project calculators

Estimate only. Check product labels, local building code, and your own measurements before you buy or build. Buy a little extra material for waste and mistakes, and follow the manufacturer's instructions.

Everyday math, dates, conversions, and school

Estimate only. Check the numbers before you rely on them. School grading scales differ, so check your school's policy.

Outside sources

We link to sources such as the CDC, NIST, and the CFPB so you can check our formulas. We do not control those sites, and a link is not an endorsement by them.