Horology Tools & Reference Guides

Professional-grade horology utilities for watch enthusiasts — track accuracy, demagnetize movements, calculate wrist presence, and explore crown position references for popular calibers.

Watch Accuracy Tracker & Logger

Log and calculate the daily rate deviation of your mechanical or quartz watches to analyze precision and consistency.

Use Tool

Watch Wrist Presence & Sizing Calculator

Calculate the case-to-wrist ratio, flat wrist width coverage, and determine the ideal watch size for your wrist based on aesthetic guidelines.

Use Tool

Watch Demagnetizing Timer & Guide

A precise countdown timer with audio cues for DIY watch demagnetization. Get the exact press duration needed for your demagnetizing coil.

Use Tool

Watch Savings Goal Planner

Set and track savings goals for your next watch purchase. Visualize progress, calculate timelines, and stay motivated.

Use Tool

Watch Crown Reference Guide

Interactive guide to watch crown positions, winding directions, and setting functions for popular movements.

Use Tool

Watch Power Reserve Estimator

Estimate how much power reserve your watch has left based on crown turns and hours worn. Works with popular ETA, Sellita, Miyota, Seiko, and Rolex calibers.

Use Tool

Watch Beat Rate Converter — VPH to Hz & s/d Calculator

Convert vibrations per hour (VPH) to Hertz, ticks per second, and calculate the daily rate impact of a single lost tick. Works with ETA, Sellita, Miyota, Seiko, Rolex, Omega, and Zenith calibers.

Use Tool

Watch Water Resistance Converter — Meters, ATM, Bar & Feet

Convert watch water resistance ratings between meters, feet, ATM, and bar. See what each rating actually means for daily wear, swimming, and diving.

Use Tool

Watch Strap Taper & Proportions Calculator

Calculate the ideal strap taper for your watch based on case diameter and lug width. Find the perfect buckle width for a balanced look.

Use Tool

# Essential Tools for Watch Enthusiasts

Whether you are regulating a mechanical movement, demagnetizing a recently magnetized watch, tracking how often you wear a timepiece, or learning the crown positions of your favorite caliber, this suite puts professional-grade horology tools at your fingertips — no expensive equipment required.

# Accuracy, Demagnetization & Crown References

From tracking daily rate deviation against atomic time to safely demagnetizing a movement with precise timing, from knowing exactly when you last wore a watch to understanding every crown position on an ETA or Miyota caliber — these tools cover the day-to-day needs of any collector or enthusiast.
4 Tools
8+ Calibers
15 Languages
Local Data Privacy