Water Leak Loss Calculator
ANA›Life Services Authority›National Calculator Authority›Water Leak Loss 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; } }
Water Leak Loss Calculator
Estimate how much water and money is lost from a leak over time, based on drip rate or continuous flow.
Leak Type
Dripping Faucet (drips/minute) Continuous Flow (gallons/minute) Steady Stream (mm diameter)
Drip Rate (drips per minute)
Typical slow drip: 10–30 | Fast drip: 60–120 | Near-stream: 200+
Flow Rate (gallons per minute)
Typical trickle: 0.05–0.2 gpm | Steady stream: 0.5–2 gpm
Stream Diameter (mm)
Pencil-thin stream ≈ 3 mm | Finger-width ≈ 10 mm
Duration
Minutes Hours Days Weeks Months Years
Water Cost ($ per 1,000 gallons)
US average ≈ $3–$8 per 1,000 gallons. Check your utility bill.
Calculate Water Loss
### Results
function watToggleInputs() { var type = document.getElementById('wat-leak-type').value; document.getElementById('wat-drip-group').style.display = (type === 'drip') ? '' : 'none'; document.getElementById('wat-flow-group').style.display = (type === 'flow') ? '' : 'none'; document.getElementById('wat-stream-group').style.display= (type === 'stream') ? '' : 'none'; }
function watShowError(msg) { var el = document.getElementById('wat-error'); el.textContent = msg; el.style.display = 'block'; document.getElementById('wat-result').style.display = 'none'; }
function watClearError() { document.getElementById('wat-error').style.display = 'none'; }
function watCalc() { watClearError();
var type = document.getElementById('wat-leak-type').value; var duration = parseFloat(document.getElementById('wat-duration').value); var durationUnit = document.getElementById('wat-duration-unit').value; var rate = parseFloat(document.getElementById('wat-rate').value);
// Validate common inputs if (isNaN(duration) || duration ' + r[0] + ''; } else { tr.innerHTML = '' + r[0] + '' + '' + r[1] + ''; } tbody.appendChild(tr); });
document.getElementById('wat-result').style.display = 'block'; }
#### Formulas Used
Dripping Faucet:
Flow Rate (gpm) = (Drips/min × 0.25 mL) ÷ 3,785.41 mL/gal
One drip ≈ 0.25 mL (USGS standard drop volume)
Continuous Flow:
Flow Rate (gpm) = user-supplied value
Stream by Diameter (Torricelli / Orifice Equation):
v = Cd × √(2gh) | Q = A × v
where Cd = 0.61 (sharp-edged orifice), g = 9.81 m/s², h = 10 m (assumed supply head ≈ 14.5 psi)
Total Water Lost:
Volume (gal) = Flow Rate (gpm) × Duration (minutes)
Cost:
Cost ($) = [Volume (gal) ÷ 1,000] × Rate ($/1,000 gal)
#### Assumptions & References
- Stream diameter calculation assumes a typical residential supply pressure head of 10 m (≈ 14.5 psi) and a sharp-edged orifice discharge coefficient Cd = 0.61.
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