Smart tools for
time, dates and work.
Calculate time. Track hours. Plan dates. Free, accurate calculators with clear visual results.
Built for accuracy.
Designed to be understood.
Hours, durations,
every format.
Calculate durations, add or subtract time, convert between formats and handle overnight spans.
Open time tools →Hours, overtime,
timesheets, pay.
Track work hours, calculate overtime, manage weekly timesheets and estimate pay for any schedule.
Open work tools →Days, deadlines,
business days.
Calculate dates, business days, deadlines and date differences with clear weekend and workweek assumptions.
Open date tools →World clocks, timers,
displays.
World clocks, countdown timers, stopwatches and full-screen display modes.
Open clocks →The tools people use most.
Basic Calculator
Perform everyday arithmetic with memory, local history, keyboard shortcuts, and fullscreen presentation.
Hours Calculator
Calculate total hours and minutes between start and end times.
Online Clock
Live online clock with five distinct light and dark display compositions.
Mortgage Calculator
Estimate monthly payments, total interest, and amortization schedule.
Age Calculator
Calculate your exact age in years, months, days, and more.
Flip Clock
Premium mechanical and Scandinavian flip-clock displays with real split panels.
Compound Interest Calculator
Project investment growth with compound interest and contributions.
Days Between Dates
Count the number of days between two dates.
Private by default.
Precise by design.
Calculations stay local where possible. Clear controls for data that requires network.
No account required
Every tool is free and open. No sign-up. Optional local save stays on this device.
Local-first where possible
Core calculations run in your browser. Weather and search use network only when needed, with consent.
Clear privacy controls
Manage consent, local data, and history from one place. No hidden tracking beyond what you allow.
Start with any tool.
All of them are free.
No account. No install. Open a calculator and get the answer.