Calculator Inputs
Example Data Table
These examples show typical job setups and approximate results for planning, bidding, and crew scheduling.
| Area | Deck Width | Speed | Overlap | Efficiency | Passes | Estimated Time |
|---|---|---|---|---|---|---|
| 20,000 sq ft | 42 in | 3 mph | 10% | 75% | 1 | 0.54 hr |
| 0.50 acre | 52 in | 4 mph | 12% | 80% | 1 | 0.50 hr |
| 3,000 sq m | 1.2 m | 5 km/h | 8% | 78% | 2 | 1.39 hr |
| 1.20 acre | 60 in | 4.5 mph | 10% | 82% | 1 | 0.93 hr |
Formula Used
Effective Width = Deck Width × (1 − Overlap ÷ 100)
Adjusted Area = Site Area × Passes × (1 + Trim Percent ÷ 100)
Coverage Rate = Effective Width × Travel Speed × Efficiency
Productive Hours = Adjusted Area ÷ Coverage Rate × Terrain Factor
Total Hours = Productive Hours + Delay Hours + Break Hours
Total Cost = (Total Hours × Crew Size × Labor Rate) + (Total Hours × Equipment Rate)
How to Use This Calculator
- Enter the total grassed or maintained area.
- Select the correct area unit, such as square feet or acres.
- Enter mower deck width and choose the matching width unit.
- Provide travel speed using a realistic operating value.
- Set overlap percentage to reflect blade overlap between passes.
- Use efficiency to account for turns, repositioning, and minor interruptions.
- Add passes, trimming allowance, terrain factor, delays, and breaks.
- Enter crew size, labor rate, and equipment cost for pricing.
- Press the calculate button to see time, output, cost, chart, and export options.
FAQs
1. What does the mowing time calculator estimate?
It estimates total mowing hours, productive cutting time, output rate, labor cost, equipment cost, and cost per 1,000 square feet for site work.
2. Why does overlap increase mowing time?
Overlap reduces the effective cutting width. Less effective width means fewer square feet are covered during each pass, so the total job takes longer.
3. What efficiency value should I enter?
Many field jobs use 70% to 85%. Lower values fit tight, obstacle-heavy areas. Higher values fit open, simple spaces with smooth turns and steady travel speed.
4. What is the terrain factor for?
Terrain factor increases productive time for slopes, rough ground, tight access, and unstable surfaces. It is helpful for construction landscapes that are not fully finished.
5. Should I include trimming and edging?
Yes. Use the extra trim percentage to add time for borders, posts, signs, fences, curbs, and detail work around site features.
6. Can I use this for large open fields?
Yes. Enter the field area, a realistic mower width, travel speed, and lower delay values. Open areas usually produce shorter times and better output rates.
7. Why add obstacle delay and break minutes separately?
They represent non-cutting time. Separating them keeps productive mowing time clear while still giving a more realistic total schedule and cost estimate.
8. Can this help with job bidding?
Yes. The calculator can support proposals by showing expected hours, crew demand, equipment cost, and normalized cost per 1,000 square feet.