Timeless Ticks
Watch tools and calculators
Calculators that answer a question in one screen. Everything runs in your browser, nothing is sent anywhere, and each one explains its own numbers.
8 watch tools. Free, no account, and everything runs locally in your browser.
Each of these answers one question in one screen, runs entirely in your browser, and explains its own numbers underneath rather than handing you a figure and leaving. Nothing you type is sent anywhere, and none of them needs an account.
They are built on the same published standards as the rest of the site: ISO 22810 and ISO 6425 for the water resistance checker, the COSC and METAS criteria for the accuracy calculator, and manufacturer specification sheets for the beat rate converter.
Beat rate converter
Convert watch beat rates: vibrations per hour to hertz, beats per second, seconds hand steps and beats per day.
Cost of ownership calculator
Work out what a watch really costs per year once servicing and realistic resale are counted, not just the sticker price.
Strap and lug width finder
Find the right watch strap: lug width, buckle size, spring bar thickness and the strap length for your wrist.
Tachymeter calculator
Use a chronograph tachymeter without the guesswork: enter elapsed seconds and distance to get speed, or units produced per hour.
Timegrapher reading explainer
Understand a timing machine readout: what your rate, amplitude and beat error numbers mean, and which of them signals a service.
Watch accuracy calculator
Work out your watch's rate in seconds per day from how far it has drifted, and see where it lands against chronometer standards.
Watch size calculator
Enter your wrist size in inches and get the case diameter, lug to lug limit, thickness and strap width that will actually fit.
Water resistance checker
Check what your watch's water resistance rating actually allows: showering, swimming, the ocean or scuba, adjusted for crown type and seal age.