Parking Lot Space Calculator

ANA›Life Services Authority›National Calculator Authority›Parking Lot Space 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; } }

Parking Lot Space Calculator

Estimate the number of parking spaces that fit in a rectangular parking lot based on lot dimensions, stall size, drive aisle width, and parking angle.

Lot Length (ft)

Lot Width (ft)

Stall Width (ft)

Stall Depth (ft)

Drive Aisle Width (ft)

Parking Angle

90° (Perpendicular) 60° (Angled) 45° (Angled) 30° (Angled) 0° (Parallel)

Lot Efficiency Factor (%)

Accounts for landscaping, walkways, entrances, etc.

Calculate

function parCalc() { var lotLength = parseFloat(document.getElementById('par-lot-length').value); var lotWidth = parseFloat(document.getElementById('par-lot-width').value); var stallWidth = parseFloat(document.getElementById('par-stall-width').value); var stallDepth = parseFloat(document.getElementById('par-stall-depth').value); var aisleWidth = parseFloat(document.getElementById('par-aisle-width').value); var angle = parseFloat(document.getElementById('par-angle').value); var efficiency = parseFloat(document.getElementById('par-efficiency').value); var resultDiv = document.getElementById('par-result');

if (isNaN(lotLength) || lotLength Please enter a valid Lot Length.'; return; } if (isNaN(lotWidth) || lotWidth Please enter a valid Lot Width.'; return; } if (isNaN(stallWidth) || stallWidth Please enter a valid Stall Width.'; return; } if (isNaN(stallDepth) || stallDepth Please enter a valid Stall Depth.'; return; } if (isNaN(aisleWidth) || aisleWidth Please enter a valid Drive Aisle Width.'; return; } if (isNaN(efficiency) || efficiency 100) { resultDiv.innerHTML = 'Efficiency must be between 1 and 100.'; return; }

var rad = angle * Math.PI / 180;

// Effective stall width and depth projected onto lot axes based on angle // For angled parking: // effectiveStallWidth = stall width / sin(angle) [along the row direction] // effectiveStallDepth = stall depth * sin(angle) + stall width * cos(angle) [perpendicular to row] // For parallel (0°): special case var effectiveStallWidth, effectiveStallDepth;

if (angle === 0) { // Parallel parking: stall occupies stallDepth along the lot length, stallWidth along the lot width effectiveStallWidth = stallDepth; // along lot length effectiveStallDepth = stallWidth; // along lot width } else { effectiveStallWidth = stallWidth / Math.sin(rad); effectiveStallDepth = stallDepth * Math.sin(rad) + stallWidth * Math.cos(rad); }

// A "module" = two rows of stalls back-to-back + one drive aisle var moduleDepth = 2 * effectiveStallDepth + aisleWidth;

// Number of complete modules that fit in the lot width var numModules = Math.floor(lotWidth / moduleDepth);

// Remaining width after full modules — check if a single row + aisle fits var remainingWidth = lotWidth - numModules * moduleDepth; var extraRow = 0; if (remainingWidth >= effectiveStallDepth + aisleWidth) { extraRow = 1; }

// Total rows var totalRows = numModules * 2 + extraRow;

// Stalls per row along lot length var stallsPerRow = Math.floor(lotLength / effectiveStallWidth);

// Raw total stalls var rawSpaces = totalRows * stallsPerRow;

// Apply efficiency factor var adjustedSpaces = Math.floor(rawSpaces * (efficiency / 100));

if (adjustedSpaces The lot dimensions are too small to fit any parking spaces with the given parameters.'; return; }

var lotArea = lotLength * lotWidth; var spacePerStall = lotArea / adjustedSpaces;

resultDiv.innerHTML = '### Results ' + '' + 'Lot Area' + lotArea.toLocaleString(undefined,{maximumFractionDigits:1}) + ' sq ft' + 'Parking Angle' + (angle === 0 ? 'Parallel (0°)' : angle + '°') + '' + 'Effective Stall Width (projected)' + effectiveStallWidth.toFixed(2) + ' ft' + 'Effective Stall Depth (projected)' + effectiveStallDepth.toFixed(2) + ' ft' + 'Module Depth (2 rows + aisle)' + moduleDepth.toFixed(2) + ' ft' + 'Total Rows' + totalRows + '' + 'Stalls per Row' + stallsPerRow + '' + 'Raw Spaces (before efficiency)' + rawSpaces + '' + 'Efficiency Factor' + efficiency + '%' + 'Estimated Parking Spaces' + adjustedSpaces + '' + 'Lot Area per Space' + spacePerStall.toFixed(1) + ' sq ft / space' + ''; }

#### Formulas Used

Projected stall width along row (angled): Effective Stall Width = Stall Width / sin(θ)

Projected stall depth perpendicular to row (angled): Effective Stall Depth = Stall Depth × sin(θ) + Stall Width × cos(θ)

Module depth (two back-to-back rows + one drive aisle): Module Depth = 2 × Effective Stall Depth + Aisle Width

Total rows: Rows = (floor(Lot Width / Module Depth) × 2) + extra single row if space permits

Stalls per row: Stalls per Row = floor(Lot Length / Effective Stall Width)

Adjusted spaces: Spaces = floor(Total Rows × Stalls per Row × Efficiency Factor)

Parallel parking (0°): Stall depth runs along lot length; stall width runs along lot width.

#### Assumptions & References

More Calculators

Read Next

Study Time Planner Authority Network America › Life Services Authority › National Calculator Authority .calc-container { max-width: 640px;...

References

Related Authorities

Life Services Authority › Professional Services Authority › Trade Services Authority › United States Authority ›