Calculators
that actually help.

Calculate your monthly mortgage payment with principal, interest, taxes, insurance, PMI, and HOA fees.

See how extra monthly or annual payments cut years off your mortgage and save thousands in interest.

Pick the date you want your mortgage paid off and we'll calculate the exact extra monthly payment you need.

Compare the true cost of renting vs buying a home - mortgage, taxes, insurance, maintenance, and rent increases over time.

See how your savings grow over time with regular contributions and compound interest.

Project how your investments grow over time with an initial lump sum, monthly contributions, and a target annual return.

Convert your hourly wage to annual, monthly, weekly, and daily pay.

Convert your annual salary to an effective hourly rate, accounting for vacation time.

Find the exact age gap between two people in years, months, days, and total days.

Enter your birthday to see what day of the week you were born, your last and next birthday, and a full visual of every birthday across weekdays.

Find out how many Friday the 13ths you've lived through since your birthday - and see the full list.

Enter your birthday to see your age in local years and local days on every planet in the solar system - plus Pluto and Halley's Comet.

Estimate your body fat percentage using the US Navy circumference method - just a measuring tape required.

Enter your age and pick an animal to discover how old you are in that creature's years — plus a full comparison table of 20 species.

Enter your pet's age and pick a species to find the human-years equivalent and life stage.

Time yourself reading a passage aloud to measure your words per minute and total speaking time — paste in your own speech to see how long it runs.