Praktické

Kalkulačka času u obrazovky

Screen Time Calculator (hrs/day)

Smartphone

Computer

✓Daily Screen Time

Daily Total

9.0h

Weekly

63.0h

What is Screen Time Calculator?

▾

Sledování času stráveného u obrazovky kvantifikuje denní vystavení telefonům, televizorům a počítačům. Nadměrný čas strávený na rekreační obrazovce souvisí se špatným spánkem, sníženou fyzickou aktivitou a nižší pohodou.

Calkulon makes complex calculations simple — built for students and everyday problem-solvers.

Vzorec

▾

f(x)Denní součet = součet minut aplikace | Doporučeno: <2 hodiny/den dospělí; <1 hodina děti 6–18

How to Screen Time Calculator

▾

1Total = Phone + TV + Computer hours per day
2Separate work/educational from recreational time
3WHO: no screens for under-2s; < 1h for 2–5yr; < 2h recreational for 5–17yr
4Adults: no formal limit; > 7h/day recreational increases health risks

Worked Examples

▾

Example 1

Given:Phone 4h + TV 2.5h + work 4h

Výsledek:Total 10.5h; recreational 6.5h — consider reducing

Real-World Applications

▾

🏗️

Secondary and university physics/chemistry coursework

🔬

Laboratory calculations and experimental data analysis

📊

Engineering design and materials science applications

Screen Time Recommendations

▾

Age	Recreational limit	Source
Under 2	None (except video calls)	WHO
2–5 years	< 1h/day	WHO
5–17 years	< 2h recreational	AHA
Adults	No formal limit	NSF

Frequently Asked Questions

▾

What is Screen Time?

Screen time tracking quantifies daily exposure to phones, TVs, and computers. Excessive recreational screen time is linked to poor sleep, reduced physical activity, and lower wellbeing

How accurate is the Screen Time calculator?

The calculator uses the standard published formula for screen time. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

What units does the Screen Time calculator use?

This calculator works with inches, watts. You can enter values in the units shown — the calculator handles all conversions internally.

What formula does the Screen Time calculator use?

The core formula is: Total = Phone + TV + Computer hours per day. Each step in the calculation is shown so you can verify the result manually.

References

›Screen time — WHO

Formula-verified for precision

Reviewed October 2026

Our methodology

Ratings & comments

…

Získejte týdenní matematické tipy

Připojte se k 12 000+ odběratelům, kteří každý týden dostávají tipy na kalkulačku.

🔒

100 % zdarma

Nikdy bez registrace

✓

Přesné

Ověřené vzorce

⚡

Okamžité

Výsledky při psaní

📱

Připraveno pro mobily

Všechna zařízení