How many liters are in one cubic meter?
Exactly 1,000 liters.
MAXScanner calculator
Water Tank Volume Calculator — Liters, Gallons & Fill Level
Calculate rectangular or vertical cylindrical tank capacity and filled volume from inside dimensions, with liters, cubic meters and US gallons.
Result
3,000 L
3 m³ · 792.52 US gal
Filled at 0.8 m depth: 2,400 L
Formula and worked example
Rectangular: V=L×W×H. Vertical cylinder: V=π×(D/2)²×H. Filled volume uses entered fill depth.
A 2 m × 1.5 m × 1 m rectangular tank holds 3 m³ = 3,000 L before freeboard.
Assumptions
- Use inside dimensions, not outside dimensions.
- Flat-ended rectangular or vertical cylindrical geometry only.
Last updated: 2026-09-16
Frequently asked questions
Should I use inside dimensions?
Yes. Wall thickness reduces usable internal capacity.