Mulch Calculator for Trees
Mulch rings protect tree roots. Use the circle tool with your ring's diameter to get cubic yards and bags.
Shape
Units
Area: 0.0 sq ft
Planning more than one thing? Open the Yard Planner → to trace your whole yard over an aerial photo and total every material at once.
How to measure for mulch
- Measure the length and width of your area in feet.
- Multiply them for square feet (or just enter length and width above).
- Choose a depth — we default to 3 inches for mulch.
- Read your total in cubic yards, or the number of bags.
Mulch for Trees coverage at a glance (3" deep)
| Area (sq ft) | Cubic yards | Bags |
|---|---|---|
| 100 | 1.0 | 14 |
| 200 | 2.0 | 28 |
| 300 | 3.1 | 42 |
| 500 | 5.1 | 69 |
| 1,000 | 10.2 | 138 |
Includes a 10% overage allowance. Estimates are low-fi — confirm with your supplier.
Frequently asked questions
How wide should a mulch ring around a tree be?
Aim for a ring at least 3 feet across (wider is better), 2–3 inches deep, and keep mulch a few inches off the trunk — no 'mulch volcanoes,' which rot the bark.
How do I calculate mulch for a round ring?
Choose the Circle shape above and enter the ring diameter; we handle the area math for you.