Free calculators and time tools that just work

Mortgage payments, BMI, percentages, timers and time zones. Clear answers in seconds, with the working shown and nothing to install.

Instant answers

Results update as you type. No submit buttons, no waiting.

Private by design

Every calculation runs in your browser. Nothing you enter is sent anywhere.

Any device, no sign-up

Big touch targets, numeric keyboards and a layout made for phones.

Financial calculators

Mortgage calculatorMonthly payment with taxes, insurance and extra payments.Loan calculatorPayment, total interest and schedule for any loan.Compound interestHow savings and monthly deposits grow over time.Salary to hourlyConvert hourly, weekly, monthly and annual pay.Tip calculatorTip, total and split the bill between people.

Health calculators

BMI calculatorBody mass index with a healthy weight range.Calorie calculatorDaily calories to maintain, lose or gain weight.

Math calculators

Percentage calculatorPercent of a number, percent change and more.Ratio calculatorSimplify ratios and solve proportions.GCF calculatorGreatest common factor with prime factorization.LCM calculatorLeast common multiple with the steps shown.

Time & date tools

Online timerCountdown timer with presets and an alarm.StopwatchOnline stopwatch with lap times.Time zone converterConvert a time between any two time zones.World clockCurrent time in major cities around the world.Days between datesCount days, weekdays and weeks between dates.Age calculatorExact age in years, months and days.Hours worked calculatorWeekly time card with breaks, overtime and pay.

Countdowns

Days until Christmas Days until Halloween Days until New Year Days until Thanksgiving Days until Valentine's Day Days until Fourth of July