{
    "name": "Fleet Utilisation Calculator",
    "url": "https://calculators.geekmidst.com/calculators/fleet-utilization-calculator",
    "markdown": "https://calculators.geekmidst.com/calculators/fleet-utilization-calculator.md",
    "category": "Logistics & transport",
    "description": "Measure fleet utilisation as vehicle-days in use against total and available vehicle-days, with availability and idle capacity.",
    "summary": "Fleet utilisation compares the vehicle-days your vehicles actually worked with the vehicle-days you had. Separating downtime shows whether low use comes from idle vehicles or vehicles off the road.",
    "also_called": [
        "Vehicle utilisation calculator"
    ],
    "applies_to": "Worldwide",
    "last_updated": "2026-10-29",
    "computation": "Results are computed in the visitor’s browser on the HTML page. This API describes the calculator; it does not compute results.",
    "inputs": [
        {
            "name": "vehicles",
            "label": "Vehicles in the fleet",
            "type": "number",
            "default": "20"
        },
        {
            "name": "days",
            "label": "Days in the period",
            "type": "number",
            "default": "30"
        },
        {
            "name": "used_days",
            "label": "Vehicle-days in use",
            "type": "number",
            "default": "476"
        },
        {
            "name": "down_days",
            "label": "Vehicle-days unavailable (optional)",
            "type": "number",
            "default": "40",
            "optional": true
        }
    ],
    "outputs": [
        {
            "key": "utilization",
            "label": "Fleet utilisation",
            "format": "percent"
        },
        {
            "key": "utilization_available",
            "label": "Utilisation of available vehicles",
            "format": "percent"
        },
        {
            "key": "availability",
            "label": "Fleet availability",
            "format": "percent"
        },
        {
            "key": "idle_days",
            "label": "Idle vehicle-days",
            "format": "number"
        },
        {
            "key": "total_days",
            "label": "Total vehicle-days",
            "format": "integer"
        }
    ],
    "formula": {
        "text": "Total = Vehicles × Days;  Available = Total − Unavailable;  Utilisation = Used ÷ Total × 100;  Availability = Available ÷ Total × 100",
        "variables": {
            "Used": "vehicle-days on which a vehicle worked",
            "Unavailable": "vehicle-days lost to maintenance or repair"
        }
    },
    "worked_example": {
        "inputs": {
            "vehicles": "20",
            "days": "30",
            "used_days": "476",
            "down_days": "40"
        },
        "steps": [
            "Total = 20 × 30 = 600 vehicle-days; available = 600 − 40 = 560.",
            "Utilisation = 476 ÷ 600 = 79.33%; of available days, 476 ÷ 560 = 85%.",
            "Availability = 560 ÷ 600 = 93.33%."
        ],
        "result": "The fleet worked 79.33% of its vehicle-days, 85% of the days vehicles were available."
    },
    "interpretation": "Low utilisation of available vehicles suggests the fleet is larger than the work needs; low availability points at maintenance. Persistent idle vehicle-days are candidates for disposal or short-term hire instead.",
    "assumptions": [
        "A vehicle counts as used for a whole day if it worked at all that day."
    ],
    "limitations": [
        "Day-based utilisation ignores how many hours or kilometres each vehicle ran; use hours or distance for finer measures."
    ],
    "rules": null,
    "faqs": [
        {
            "question": "Should weekends count?",
            "answer": "Count only days the vehicles are meant to be available; otherwise utilisation looks low by design."
        },
        {
            "question": "Can I use hours instead of days?",
            "answer": "Yes. Enter vehicle-hours throughout, with “Days in the period” as the available hours per vehicle."
        }
    ],
    "sources": [],
    "related": [
        {
            "name": "Fleet Maintenance Reserve Calculator",
            "url": "https://calculators.geekmidst.com/calculators/fleet-maintenance-reserve-calculator"
        },
        {
            "name": "Driver Duty Hours Calculator",
            "url": "https://calculators.geekmidst.com/calculators/driver-duty-hours-calculator"
        },
        {
            "name": "Percentage Calculator",
            "url": "https://calculators.geekmidst.com/calculators/percentage-calculator"
        }
    ],
    "disclaimer": null,
    "publisher": "GM¹X CalcVerse"
}