Operator Calculators

About

Operator Calculators puts the small, everyday business math you reach for
constantly — margin, markup, break-even, ROI, loan payments — one click
away in your toolbar. No tab switching, no spreadsheet, no page reload.
Type a number, see the answer.

Included calculators:

- Margin & Markup — cost and price → gross margin and markup
- Break-Even Units — fixed costs, price, and variable cost → break-even volume
- Profit Margin — revenue and costs → net profit and margin
- Simple Loan Payment — principal, rate, and term → monthly payment
- ROI — gain and cost → return on investment
- Percentage / Growth Change — old vs. new value → % change
- Markup ↔ Margin Converter — type either percentage, the other updates live

Every card has a Copy Result button, and the popup remembers the last
calculator you used so it reopens right where you left off.

For anything that needs more than a couple of inputs — DCF, IRR, NPV,
business valuation, SBA loan underwriting, DSCR, working capital, SaaS
metrics — the popup links straight out to the full calculator on
operatorcalculators.com. The extension stays fast and focused; the deeper
tools live where they have room to work.

Privacy: all math runs locally in the popup. The extension makes no network
requests of its own and collects no data — the only permission it uses is
local storage, to remember which calculator you had open last. Full privacy
policy: https://www.operatorcalculators.com/privacy/