Swell Factor Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter the in-situ (bank) density and the loose density.
- Press Calculate.
- Read the swell factor and swell percentage.
How it works
Swell factor = bank density ÷ loose density = loose volume ÷ bank volume. It tells you how much 1 BCM bulks up once dug.
Worked example
Bank 2.6, loose 1.8 t/m³. Swell factor 1.44 (44% swell).
Frequently asked questions
What's swell used for?
Converting in-situ (bank) volumes to loose (truck/stockpile) volumes for haulage and stockpile planning.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.