Ontario Edition

Septic Tank Size Calculator Ontario

Calculate septic tank size in gallons and feet. Tuned for Ontario usage assumptions and fast sizing guidance.

Calculate Septic Tank Size

Gallons per person / day

Results

Recommended Tank Volume

Suggested Tank Dimensions

Assumes 2:1 length-to-width ratio and typical depth

Soakaway Area Needed

Estimates only. Local codes vary—confirm with your municipality or engineer.