# Calculators

Four calculators for the numbers you need before you buy. They run in your browser and nothing you type leaves the page.

*Verified 2026-10-25 · https://roitechnologies.net/tools/*

> **Short answer:** Signage ROI offers four digital signage calculators: cost per screen per month and per year, electricity cost, storage and bandwidth for content, and the screen size and text size that fit a viewing distance. Each one shows its formula and the sources behind its numbers, and none of them uses a made-up sales uplift.

- [Cost per screen](https://roitechnologies.net/tools/cost-per-screen/): Display, player, software, content time, power and upkeep per screen per month and per year, and the extra sales needed to cover it.
- [Screen size and viewing distance](https://roitechnologies.net/tools/screen-size-and-viewing-distance/): How far people can read your screen, and the smallest screen for your room, from the AVIXA DISCAS rules.
- [Energy cost](https://roitechnologies.net/tools/signage-energy-cost/): Yearly kWh and electricity cost of screens and players, with business prices for ten European markets.
- [Storage and bandwidth](https://roitechnologies.net/tools/content-storage-and-bandwidth/): Storage per screen, the speed for a first download, monthly update traffic and the cost of streaming instead.

Read how to build the business case in [digital signage ROI](https://roitechnologies.net/learn/digital-signage-roi/) and what screens cost in [how much digital signage costs](https://roitechnologies.net/learn/how-much-does-digital-signage-cost/).