How the Excavation Calculator works
Volume = Length × Width × Depth, with a swell factor for loose volume.
How to use this calculator
- Sign up free and verify your email to unlock the calculator.
- Choose Metric (m, mm, m³, kg) or Imperial (ft, in, cft, lb) units.
- Enter the length, width, depth, bulking.
- Results update instantly — read the quantities in the Results panel.
- Add a wastage allowance and confirm against your drawings and specifications before ordering.
Typical uses
Foundation trenches, basements and pits.
Assumptions & limitations
Results are planning estimates based on standard assumptions for earthwork & site work. They do not replace structural design, site measurement or project specifications. Material densities, wastage and mix proportions vary by region and supplier.
Frequently asked questions
- How does the Excavation Calculator work?
- Volume = Length × Width × Depth, with a swell factor for loose volume.
- Can I use the Excavation Calculator in feet and inches?
- Yes. Switch to Imperial and enter feet, inches, square feet or pounds — the calculator converts automatically and shows results in imperial units.
- When should I use the Excavation Calculator?
- Foundation trenches, basements and pits.
- Is this construction calculator free?
- Yes. All CM PRO construction calculators are free — you only need to sign up and verify your email.
Related searches: excavation calculator, earthwork volume, digging volume calculator.
