Screen Time Calculator

A fast three-step workflow

How to use the screen time calculator

1
Enter the known information
Add only the values or source text the calculation needs. Useful examples and safe defaults are already selected.
2
Adjust the assumptions
Use the extra controls to match your real task instead of accepting a hidden one-size-fits-all assumption.
3
Review the complete result
Check the main answer, supporting values and method before copying, downloading or acting on the result.

What makes this tool more useful

See what a daily average becomes over a year, then model a small reduction. The tool reports reclaimed hours and days without judging how the device is used.

Weekly and yearly totalsIncluded in the same responsive workspace, with no account wall or separate result page.

Awake-time percentageIncluded in the same responsive workspace, with no account wall or separate result page.

Reduction-goal projectionIncluded in the same responsive workspace, with no account wall or separate result page.

Hours and days reclaimedIncluded in the same responsive workspace, with no account wall or separate result page.

How the calculation works

Daily hours are multiplied across calendar periods. Awake-time share uses a configurable average sleep duration for context.

Review personal routines, family device plans or productivity goals using a transparent time estimate.

Private, fast and mobile-ready

The workspace runs with browser JavaScript and does not submit entered values to a Rantey calculation endpoint. Controls use readable labels, large touch targets and responsive result panels for narrow screens.

Frequently asked questions