SMALL PLACE TO START
Use your own history as reference
Name a task and its type, then guess the minutes before you start. Pause when something interrupt you and finish when task done. Use the same type name for repeated tasks, like emails. The ongoing ratio na total recorded time divided by total estimated time for that type.
Wetin this one dey based on
Na timing and calculation tool be this, no be assessment for time blindness or any condition. Ratio of 1.6× mean say your recorded tasks take 1.6 times the minutes wey you estimate altogether. One run na just one observation. Different task sizes, pauses and rules for when to stop affect the result; we no promise better accuracy.
Some useful answers
Wetin happen when something interrupt me or if I close the tab?
Pause stop adding time until you continue. Running timer continue to count clock time through reload or closed tab, so pause before you comot if you want exclude that time. Timers depend on device clock and browser; changes to system clock fit affect them.
How una calculate my ongoing ratio?
For each task type, divide total actual minutes by total guessed minutes. Task type names no mind uppercase or lowercase letters or spaces for their beginning and end. Ratio above 1 mean recorded tasks take longer altogether; below 1 mean less time. Paused interruptions no count. Na your own task history be this, no be comparison with other people.