How long does it take to dig a hole with an excavator?

How long does it take to dig a foundation pit?

You've already rented an excavator and want to start digging right away? No problem! For those who want to get going immediately, we've summarized the formula for calculating the time needed:

Duration (in hours) = Volume of hole (in cubic meters) ÷ Hourly output of excavator (in cubic meters per hour)

This formula may seem complicated at first, so we'll explain the calculation step by step:

Step 1: How to calculate an excavator's hourly output

To determine an excavator's hourly output, there are various tables that specify the output depending on soil conditions and environmental factors. A simple yet reliable approach is to use the "Landshut Formula". This allows for a rough estimate of an excavator's hourly output:

Hourly output of excavator (in cubic meters per hour) = Engine power of excavator (in kW) x 0.75

If the engine power in kW is not known, you can also calculate based on engine power in PS:

Hourly output of excavator (in cubic meters per hour) = Engine power of excavator (in PS) x 0.55

The factors 0.75 and 0.55 are standard factors. They're based on average values and provide a good foundation for your calculations.

Step 2: Calculate the volume of your excavation

The hourly output indicates how much material can be dug out in one hour. To know how many cubic meters of soil you need to excavate, calculate the volume of the hole. The volume depends on the shape of the hole:

Rectangular base (e.g., for a pool):

Volume (in cubic meters) = Length x Width x Depth (in meters)

Step 2: Calculate the volume of your excavation

Hemispherical base (e.g., for a pond):

Volume (in cubic meters) = 2 x Radius³ (in meters)

Remember that these calculations serve as rough guidelines, as actual conditions on the job site may vary.

Step 3: Calculate the duration of excavation

Once you know the volume of the hole to be dug and the hourly output of the excavator, you can calculate the time needed:

Duration (in hours) = Volume of hole (in cubic meters) ÷ Hourly output of excavator (in cubic meters per hour)

This formula gives you a good estimate of how long the excavation will take. However, keep in mind that the actual duration depends on the experience of the operator and the specific conditions on site.

Example: How long does it take to dig a pool or pond with an excavator?

A mini excavator in a garden

Let's say you want to dig a rectangular pool that's 8.50 meters long, 2.50 meters wide, and 1.50 meters deep. You rent a mini excavator with an engine power of 11.8 kW.

Step 1: Calculate the excavator's hourly output

Hourly output (in cubic meters per hour) = 11.8 kW x 0.75 = 8.85 cubic meters per hour

Step 2: Calculate the pool volume

Volume (in cubic meters) = 8.50 x 2.50 x 1.50 = 31.9 cubic meters

Step 3: Calculate the duration

Duration (in hours) = 31.9 cubic meters ÷ 8.85 cubic meters per hour = approx. 3.6 hours

So you'll need about three and a half to four hours to dig out the pool. Keep in mind that inexperienced operators may need more time, and you should also factor in additional time for idle periods or transporting the excavator.

How do I operate a mini excavator?

To help you get started with a mini excavator, we've created a video that explains the basic functions. After watching, you can start right away and use your excavator efficiently.

Advantages of renting equipment with klarx

If you want to rent an excavator or mini excavator, klarx offers many advantages:

• Well-maintained machines
  All rented machines are regularly serviced and in excellent condition.
• Delivery across Germany
  klarx delivers machines directly to your job site, saving time and costs.
• Easy booking
  Booking is straightforward and quick online.
• Large selection
  klarx offers a wide range of construction equipment for different projects.
• Transparent prices
  There are no hidden costs, making planning easier.

Discover our equipment

---

Disclaimer:
Please note that our website is provided purely for informational purposes. All information provided is offered without warranty as to accuracy or completeness. Although the content on our website – especially legal articles – is researched with great care, the provider cannot assume liability for the accuracy, completeness, and timeliness of the information provided.

Image credits:
"A mini excavator in a garden" © Canva