Potting Mix Volume Calculator

ANALife Services AuthorityNational Calculator Authority›Potting Mix Volume Calculator

.calc-container { max-width: 640px; margin: 2rem 0; padding: 1.5rem; background: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); font-family: system-ui, -apple-system, sans-serif; } .calc-container h3 { font-family: Georgia, serif; font-size: 1.15rem; color: #1a1a1a; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; flex-wrap: wrap; } .calc-row label { min-width: 160px; font-size: 0.9rem; color: #333; font-weight: 500; } .calc-row input[type="number"], .calc-row select { flex: 1; min-width: 120px; max-width: 200px; padding: 0.5rem 0.6rem; border: 1px solid #ccc; border-radius: 4px; font-size: 0.9rem; font-family: system-ui, sans-serif; color: #1a1a1a; background: #fafaf8; } .calc-row input:focus, .calc-row select:focus { outline: none; border-color: var(--ac, #3d5a80); box-shadow: 0 0 0 2px rgba(26,74,138,0.12); } .calc-row .unit { font-size: 0.82rem; color: #888; min-width: 30px; } .calc-btn { display: inline-block; margin-top: 0.5rem; padding: 0.55rem 1.5rem; background: var(--ac, #3d5a80); color: #fff; border: none; border-radius: 4px; font-size: 0.9rem; font-weight: 600; cursor: pointer; font-family: system-ui, sans-serif; } .calc-btn:hover { opacity: 0.9; } .calc-result { margin-top: 1.25rem; padding: 1rem 1.25rem; background: #f0f6fc; border-left: 3px solid var(--ac, #3d5a80); border-radius: 0 6px 6px 0; display: none; } .calc-result.visible { display: block; } .calc-result-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: #666; margin-bottom: 0.25rem; } .calc-result-value { font-size: 1.6rem; font-weight: 700; color: var(--ac, #3d5a80); } .calc-result-detail { font-size: 0.85rem; color: #555; margin-top: 0.5rem; line-height: 1.5; } .calc-note { margin-top: 1rem; font-size: 0.8rem; color: #888; font-style: italic; } .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.75rem; } .calc-grid-item { padding: 0.6rem 0.8rem; background: #f8f9fa; border-radius: 4px; border: 1px solid #eee; } .calc-grid-item .label { font-size: 0.75rem; color: #888; text-transform: uppercase; letter-spacing: 0.04em; } .calc-grid-item .value { font-size: 1.1rem; font-weight: 600; color: #1a1a1a; } @media (max-width: 720px) { .calc-row { flex-direction: column; align-items: flex-start; gap: 0.3rem; } .calc-row label { min-width: auto; } .calc-row input[type="number"], .calc-row select { max-width: 100%; width: 100%; } .calc-grid { grid-template-columns: 1fr; } } .calc-chart { margin: 1rem 0; text-align: center; } .calc-chart svg { max-width: 100%; height: auto; } .calc-chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem 1.2rem; margin-top: 0.6rem; font-size: 0.8rem; color: #555; } .calc-chart-legend span { display: inline-flex; align-items: center; gap: 0.3rem; } .calc-chart-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; font-style: normal; } .calc-related { max-width: 640px; margin: 2rem 0 1rem; padding: 1.25rem 1.5rem; background: #f8f9fa; border: 1px solid #e8e8e8; border-radius: 8px; } .calc-related h3 { font-family: Georgia, serif; font-size: 1rem; color: #1a1a1a; margin: 0 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-related-list { list-style: none; padding: 0; margin: 0 0 0.75rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 1.5rem; } .calc-related-list li a { font-size: 0.88rem; color: var(--ac, #3d5a80); text-decoration: none; } .calc-related-list li a:hover { text-decoration: underline; } .calc-browse-all { margin: 0.5rem 0 0; font-size: 0.9rem; font-weight: 600; } .calc-browse-all a { color: var(--ac, #3d5a80); text-decoration: none; } .calc-browse-all a:hover { text-decoration: underline; } @media (max-width: 720px) { .calc-related-list { grid-template-columns: 1fr; } }

Potting Mix Volume Calculator

Calculate the volume of potting mix needed to fill containers, pots, or raised beds of various shapes.

Container Shape

Cylinder (Round Pot) Rectangle / Raised Bed Square Pot Tapered / Cone Pot

Pot Diameter (inches)

Pot Depth (inches)

Length (inches)

Width (inches)

Depth (inches)

Side Length (inches)

Depth (inches)

Top Diameter (inches)

Bottom Diameter (inches)

Depth (inches)

Fill Percentage (%)

Typically 85–95% to allow watering space at the top.

Number of Containers

Calculate

function potToggleShape() { var shape = document.getElementById('pot-shape').value; var sections = ['cylinder','rectangle','square','cone']; sections.forEach(function(s) { document.getElementById('pot-' + s + '-inputs').style.display = (s === shape) ? '' : 'none'; }); document.getElementById('pot-result').style.display = 'none'; }

function potCalc() { var shape = document.getElementById('pot-shape').value; var fillPct = parseFloat(document.getElementById('pot-fill-pct').value); var numCont = parseInt(document.getElementById('pot-num-containers').value); var resultDiv = document.getElementById('pot-result');

// --- Validation helpers --- function err(msg) { resultDiv.style.display = 'block'; resultDiv.className = 'calc-result calc-error'; resultDiv.innerHTML = 'Error: ' + msg; } function getVal(id) { return parseFloat(document.getElementById(id).value); }

if (isNaN(fillPct) || fillPct 100) { err('Fill percentage must be between 1 and 100.'); return; } if (isNaN(numCont) || numCont ' + 'Total Volume Needed' + 'Cubic Inches' + totalVolIn3.toFixed(1) + ' in³' + 'Quarts' + qt.toFixed(2) + ' qt' + 'Gallons' + gal.toFixed(2) + ' gal' + 'Cubic Feet' + cf.toFixed(3) + ' ft³' + 'Liters' + L.toFixed(2) + ' L' + 'Bags Required (round up to nearest whole bag)' + '1 cu ft bags' + Math.ceil(bags1cf) + ' bag(s) (' + bags1cf.toFixed(2) + ' exact)' + '2 cu ft bags' + Math.ceil(bags2cf) + ' bag(s) (' + bags2cf.toFixed(2) + ' exact)' + '8-quart bags' + Math.ceil(bags8qt) + ' bag(s) (' + bags8qt.toFixed(2) + ' exact)' + '16-quart bags' + Math.ceil(bags16qt) + ' bag(s) (' + bags16qt.toFixed(2) + ' exact)' + ''; }

#### Formulas Used

Cylinder (Round Pot): V = π × r² × h  |  r = diameter ÷ 2

Rectangle / Raised Bed: V = length × width × depth

Square Pot: V = side² × depth

Tapered / Cone (Frustum): V = (π × h ÷ 3) × (R² + R·r + r²)  |  R = top radius, r = bottom radius

Adjusted Volume: Vtotal = V × (fill% ÷ 100) × number of containers

Unit Conversions: 1 gallon = 231 in³  |  1 quart = 57.75 in³  |  1 ft³ = 1,728 in³  |  1 liter = 61.0237 in³

#### Assumptions & References

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References