ISLE HELI
Hourly Cost Calculator
Build a realistic hourly operating number using fuel, reserves, fixed costs, crew, and cruise speed.
isleheli.com
Load Sample
Load Tight Margin
Reset to Zero
Inputs
Step 1 · Hourly Variable Costs
Fuel burn (gallons/hour)
Fuel price ($/gallon)
Oil or fluids ($/hour)
Unscheduled maintenance buffer ($/hour)
Engine 1 overhaul cost ($)
Engine 1 TBO / life limit (hours)
Engine 2 overhaul cost ($)
Engine 2 TBO / life limit (hours)
Other reserve items ($/hour)
Crew cost ($/hour)
Step 2 · Annual Fixed Costs
Annual insurance ($)
Annual hangar / parking ($)
Annual inspection / compliance ($)
Annual loan interest / finance cost ($)
Other annual fixed costs ($)
Examples: subscriptions, admin overhead, database or avionics support, tracking, etc.
Step 3 · Usage Assumptions
Estimated annual flight hours
Average cruise speed (knots)
Results
Fuel Cost per Hour
$0.00
Engine 1 Reserve per Hour
$0.00
Engine 2 Reserve per Hour
$0.00
Total Variable Cost per Hour
$0.00
Fixed Cost per Hour
$0.00
True Hourly Operating Cost
$0.00
Cost per Nautical Mile
$0.00
Formula used
Hourly cost = fuel + oil/fluids + engine 1 reserve + engine 2 reserve + unscheduled maintenance buffer + other reserve items + crew cost + fixed cost per hour.
Fixed cost per hour = total annual fixed costs ÷ estimated annual flight hours.
Cost/NM = total hourly cost ÷ cruise speed.
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