Break Even Calculator

WHAT IT DOES

Break Even Calculator is a floating calculator panel that computes the break-even point — the number of units you need to sell to cover all costs. Enter fixed costs, variable cost per unit, and price per unit. The panel calculates break-even units, break-even revenue, contribution margin percentage, and displays a visual chart showing revenue, total cost, and fixed costs at different sales volumes.

WHERE IT RUNS

This script runs on any website you visit. It reads only the page you are looking at, never other tabs, bookmarks, or browser data. All data stays in your browser — nothing is sent anywhere.

HOW TO USE

Click the Break Even Calculator panel button in the BotGentz extension toolbar. The panel appears at the edge of the page. Enter your fixed costs (rent, salaries, equipment), variable cost per unit (materials, labor per item), and price per unit. The break-even point updates instantly — showing units needed, revenue required, and contribution margin. The chart visualizes revenue vs total cost at different sales volumes, with the break-even point clearly marked. Use "Copy Results" to copy the full analysis to your clipboard. You can save your default values — they persist across pages.

TECHNICAL MECHANISM

The calculator uses the standard break-even formula: Break-even units = Fixed Costs / (Price - Variable Cost per Unit). Contribution margin is calculated as (Price - Variable Cost) / Price × 100%. The chart generates data points from 0 to 2.2x the break-even point, calculating total revenue (units × price) and total cost (fixed + units × variable) at each step. Bars are scaled to the maximum value and color-coded (teal for revenue, amber for cost). The entire computation runs client-side in pure JavaScript, with no external dependencies.

THE PANEL

The panel is a floating overlay that you can drag anywhere on the screen by its header. It remembers its position per site so it reappears where you left it. The panel can be collapsed into a small handle to get it out of the way, and snapped to the edge of the page. It can be resized to fit your workflow. Press Escape to close the panel.

PLEASE NOTE

This script requires the free BotGentz extension to run. All data is stored locally in your browser — nothing is transmitted or shared. The panel works on any website. The calculator is for estimation purposes only — actual break-even analysis may vary based on additional factors like economies of scale, taxes, and other costs. Sites change — the script may need updates to match new site structures.