Measure twice, make once
Live row counter
Keep one confirmed count synchronized wherever this counter link is open.
The page shows its formula, example, assumptions, rounding, and limitations beside the calculator.
Live row counter
Keep one confirmed count synchronized wherever this counter link is open.
Connecting
Current count:0
The counter works locally and stores its value in this browser while offline. Anyone with the shared link can change the synced counter; do not use it for private or sensitive information.