Water Loss Rate Calculator

ANA›Life Services Authority›National Calculator Authority›Water Loss Rate 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 Loss Rate Calculator

Calculate the rate of water loss from a system (tank, reservoir, pipe, etc.) based on volume measurements over time.

Initial Volume (liters)

Final Volume (liters)

Time Elapsed

Time Unit

Seconds Minutes Hours Days

Calculate Results will appear here.

function watCalc() { var resultDiv = document.getElementById('wat-result');

var initialVolume = parseFloat(document.getElementById('wat-initial-volume').value); var finalVolume = parseFloat(document.getElementById('wat-final-volume').value); var timeElapsed = parseFloat(document.getElementById('wat-time-elapsed').value); var timeUnit = document.getElementById('wat-time-unit').value;

// --- Input Validation --- if (isNaN(initialVolume) || isNaN(finalVolume) || isNaN(timeElapsed)) { resultDiv.innerHTML = '⚠ Please fill in all fields with valid numbers.'; return; } if (initialVolume ⚠ Volumes cannot be negative.'; return; } if (timeElapsed ⚠ Time elapsed must be greater than zero.'; return; } if (finalVolume > initialVolume) { resultDiv.innerHTML = '⚠ Final volume cannot exceed initial volume (no water gain assumed). Check your inputs.'; return; }

// --- Convert time to seconds for base calculation --- var timeInSeconds; var timeLabel; switch (timeUnit) { case 'seconds': timeInSeconds = timeElapsed; timeLabel = timeElapsed + ' second(s)'; break; case 'minutes': timeInSeconds = timeElapsed * 60; timeLabel = timeElapsed + ' minute(s)'; break; case 'hours': timeInSeconds = timeElapsed * 3600; timeLabel = timeElapsed + ' hour(s)'; break; case 'days': timeInSeconds = timeElapsed * 86400; timeLabel = timeElapsed + ' day(s)'; break; default: timeInSeconds = timeElapsed * 3600; timeLabel = timeElapsed + ' hour(s)'; }

// --- Core Formulas --- // Volume lost (liters) var volumeLost = initialVolume - finalVolume;

// Loss rate in L/s var lossRatePerSecond = volumeLost / timeInSeconds;

// Derived rates var lossRatePerMinute = lossRatePerSecond * 60; var lossRatePerHour = lossRatePerSecond * 3600; var lossRatePerDay = lossRatePerSecond * 86400;

// Percentage loss var percentageLoss = (volumeLost / initialVolume) * 100;

// Time to empty remaining volume (at current loss rate), in hours
var timeToEmptyHours = (finalVolume > 0 && lossRatePerHour > 0)
? finalVolume / lossRatePerHour
null;

// --- Format helpers --- function fmt(val, decimals) { if (val === null || isNaN(val)) return 'N/A'; return val.toFixed(decimals !== undefined ? decimals : 4); }

var timeToEmptyStr = (timeToEmptyHours !== null)
? fmt(timeToEmptyHours, 2) + ' hours (' + fmt(timeToEmptyHours / 24, 2) + ' days)'
'N/A (tank already empty or no loss)';

resultDiv.innerHTML = '### Results ' + '' + 'Volume Lost' + fmt(volumeLost, 3) + ' L' + 'Percentage Lost' + fmt(percentageLoss, 2) + ' %' + 'Loss Rate (per second)' + fmt(lossRatePerSecond, 6) + ' L/s' + 'Loss Rate (per minute)' + fmt(lossRatePerMinute, 5) + ' L/min' + 'Loss Rate (per hour)' + fmt(lossRatePerHour, 4) + ' L/hr' + 'Loss Rate (per day)' + fmt(lossRatePerDay, 3) + ' L/day' + 'Est. Time to Empty (from final volume)' + timeToEmptyStr + '' + ''; }

#### Formulas Used

Volume Lost: Vloss = Vinitial − Vfinal

Loss Rate: R = Vloss ÷ t

where t is the elapsed time converted to the desired unit (seconds, minutes, hours, or days).

Percentage Loss: % Loss = (Vloss ÷ Vinitial) × 100

Estimated Time to Empty (remaining volume): tempty = Vfinal ÷ Rper hour

#### Assumptions & References

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References

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