Calculator Input
Enter equipment data, project duration, load conditions, and fuel price to estimate consumption, budget, and daily storage.
Formula Used
Full-load fuel rate (L/h) = [Engine power (kW) × BSFC (g/kWh) ÷ 1000] ÷ Diesel density (kg/L)
Active burn rate (L/h) = Full-load fuel rate × Load factor
Idle burn rate (L/h) = Active burn rate × Idle fuel factor
Average burn rate (L/h) = (Active share × Active burn rate) + (Idle share × Idle burn rate)
Project total fuel (L) = Average burn rate × Hours per day × Days × Number of machines
Total fuel cost = Project total fuel × Fuel price per liter
Recommended daily storage = Daily fleet consumption + 10% reserve
How to Use This Calculator
- Enter the equipment name so the result and exports stay clear.
- Provide engine power, BSFC, and diesel density if you want the fuel rate estimated from machine data.
- If you already know the machine’s full-load burn rate, enter it in the direct full-load field.
- Set the expected load factor, idle share, and idle fuel factor for site conditions.
- Add working hours, project days, machine count, and fuel price.
- Press the calculate button to show the result above the form.
- Review the graph, compare hourly and project totals, then export the result as CSV or PDF.
Example Data Table
| Equipment | Power (kW) | Load (%) | Idle (%) | Hours/day | Machines | Estimated Daily Fleet Fuel (L) |
|---|---|---|---|---|---|---|
| Excavator | 180 | 65 | 15 | 8 | 2 | 431.14 |
| Wheel Loader | 145 | 60 | 12 | 9 | 1 | 167.38 |
| Bulldozer | 220 | 70 | 10 | 7 | 2 | 494.74 |
| Generator Set | 90 | 75 | 0 | 10 | 1 | 182.09 |
Frequently Asked Questions
1) What does this diesel consumption calculator estimate?
It estimates hourly burn rate, daily fuel demand, total project fuel use, total cost, recommended daily storage, and estimated carbon emissions for construction equipment or fleets.
2) Can I use a known fuel rate instead of engine power?
Yes. Enter a direct full-load fuel rate in liters per hour. That value overrides the fuel rate derived from engine power, specific fuel consumption, and diesel density.
3) What is load factor in this calculator?
Load factor is the share of full-load engine output normally used during productive work. Higher load factors increase active fuel burn and raise total site fuel demand.
4) Why does the calculator ask for idle time share?
Construction machines often run without doing full work. Idle share helps model that downtime so the result reflects real site conditions instead of assuming all hours are equally productive.
5) What is idle fuel factor?
Idle fuel factor is the portion of active burn used while the machine idles. For example, 35% means the machine burns 35% of its active rate during idle periods.
6) Does this calculator work for fleets?
Yes. Enter the number of machines to scale daily and project fuel needs. This is useful for planning bulk fuel deliveries, storage tanks, and project budgets.
7) How accurate is the result?
It is a practical planning estimate. Accuracy depends on realistic inputs for load, idling, work hours, and site conditions. Measured field data will always improve planning quality.
8) Why is recommended storage higher than daily fleet use?
The calculator adds a 10% reserve. This extra volume helps cover delivery delays, shift overruns, hot weather losses, and normal day-to-day variation in site consumption.