Utilization Calculation

How fleet and vehicle utilization percentages are computed

Utilization Calculation

Utilization measures how effectively the fleet is being rented out.

Formula

Utilization % = (Actual Rental Days / Rentable Days) x 100

Capped at 100% (overlapping trips can’t exceed it).

Actual Rental Days

Calculated from trip timestamps — NOT from the trip_days field (which can be inaccurate):

const actualDays = trips.reduce((sum, trip) => {
    const start = new Date(trip.trip_start);
    const end = new Date(trip.trip_end);
    const days = (end.getTime() - start.getTime()) / (1000 * 60 * 60 * 24);
    return sum + Math.max(days, 0);
}, 0);

The trip_days field from Turo’s CSV sometimes reports rounded values. Always use trip_start and trip_end timestamps for accurate day calculations.

Rentable Days

The number of days a vehicle could have been rented:

Rentable Days = Days from first trip date to TODAY

For fleet-level utilization, this is summed across all active vehicles.

Worked Example

Vehicle: 2024 Tesla Model 3

• First trip: January 1, 2026
• Today: March 10, 2026
• Rentable days: 69 days

Trips this period:

Trip	Start	End	Days
Trip 1	Jan 3	Jan 6	3.0
Trip 2	Jan 10	Jan 17	7.0
Trip 3	Jan 25	Jan 28	3.0
Trip 4	Feb 1	Feb 8	7.0
Trip 5	Feb 15	Feb 22	7.0
Trip 6	Mar 1	Mar 5	4.0
Total			31.0 days

Utilization = (31.0 / 69) x 100 = 44.9%

Fleet-Level Utilization

For the entire fleet:

Fleet Utilization = Sum(all vehicle actual days) / Sum(all vehicle rentable days) x 100

Only vehicles with status active and at least one trip are included.

Per-Vehicle Metrics

The dashboard also calculates per-vehicle:

• Average Daily Rate = Vehicle earnings / Actual rental days
• Revenue per Rentable Day = Vehicle earnings / Rentable days
• Vehicles are ranked by earnings in the KPI dashboard

Key File

src/lib/kpi/calculations.ts (lines ~200-280) — Contains the utilization calculation logic.