Before you start
What you need
Starting cash, ending cash, elapsed months, and currency.
Finance & Business Finance
Burn Rate Calculator
Measure average historical monthly cash burn and estimate runway from the ending cash balance.
- 01Private browser calculation
- 02Assumptions stay visible
- 03CSV and print ready
Transparent method
How this calculation works
Cash used is starting cash minus ending cash. Dividing by elapsed months produces average burn, and ending cash divided by burn estimates runway.
Useful output
What you receive
Average monthly burn, cash used, implied runway, assumptions, and CSV.
Decision guardrail
What this does not decide
An average can conceal accelerating spend, delayed receipts, financing, or large one-off movements.
Practical uses
Where this tool helps
- Review a completed quarter.
- Compare actual burn with plan.
- Create a baseline for a forecast.
Data boundary
Financial inputs remain local
Calculations and report generation run in your browser. Nirmion does not upload, retain, or recover the values entered here. The public catalogue request contains only the tool slug.