Soil Mix Calculator - Lucky Cat Creations

Soil Volume & Mix Calculator

Uses your exact products & bag sizes. Combined rounding ensures the mix fills the bed without overbuying.

Bed Dimensions

Length

Width

Fill Depth

Tip: Measure the soil fill depth, not the total bed wall height.

Settings

Top-off / Settling (%)

Combined rounding (smart) Allocates whole bags across components so the combined volume reaches the target with minimal overage.

Choose a Mix

Lucky Cat 9b Mix — 70% Kellogg Raised Bed & Potting Mix • 30% Garden Time Mushroom Compost (mulch 2″ on top) Balanced Bed Mix — 50% Kellogg RB&P • 30% Garden Time Compost • 20% Sta-Green Perlite (8 qt) Water-Wise / Hot — 40% Garden Time Compost • 30% Happy Trees Coco Coir • 20% Kellogg RB&P • 10% Sta-Green Perlite (8 qt) Classic 1/3 • 1/3 • 1/3 — ⅓ Garden Time Compost • ⅓ Happy Trees Coco Coir • ⅓ Sta-Green Perlite (8 qt)

Custom Mix — set your own components

Custom percentages should total 100%. Components default to 1.0 cu ft/bag unless you edit the code.

Mix Components (auto)

Names link to the exact products; bag sizes below are per bag.

Total Volume

0.00 cu ft

0.00 cu yd

With Top-off

0.00 cu ft

(+0%)

Bags Needed

0 bags

Combined or per-component (toggle above)

Component	Percent	Cubic Ft	Bag Size (cu ft)	Bags
Enter dimensions and choose a mix to see the breakdown.

Tip: Mulch 2″ on top (not included). For mulch volume, use bed area × 2/12 ft.