Burner Length Calculator

Plan a safe burner bar that fits perfectly. Adjust rows, overlap, and nozzle counts easily. Save a clean report for records and purchasing decisions.

Pick the option that matches your layout.
Results display in this unit.
Safety note
Flame tools can ignite mulch and dry weeds. Follow local rules, wind limits, and PPE guidance.
Bed width coverage inputs
Sizes a bar to cover a bed width using nozzle spacing and overlap.
Target width to cover across the bed.
Center-to-center distance between nozzles.
Coverage overlap between adjacent flames (0–89%).
Margin beyond the outermost nozzle centerline.
Row span coverage inputs
Sizes a bar to span a number of rows with a chosen row spacing.
Rows covered simultaneously.
Center-to-center spacing between rows.
Extra length beyond first and last row centers.
Given bar length inputs
Estimates how much width your existing bar can cover.
Total physical length of the burner bar.
Center-to-center distance between nozzles.
Coverage overlap between adjacent flames (0–89%).
Margin beyond outermost nozzle centerline.
After you submit, results appear above this form.
Reset
Formula used
Bed width method
  • Effective spacing = spacing × (1 − overlap/100)
  • Usable width = max(bed width − 2×edge clearance, 0)
  • Nozzle count = ceil(usable width / effective spacing) + 1
  • Burner length = (nozzle count − 1) × spacing + 2×edge clearance
Row span method
  • Burner length = (rows − 1) × row spacing + 2×edge clearance
Given bar method
  • Nozzle count = floor((bar length − 2×edge clearance) / spacing) + 1
  • Effective coverage = 2×edge clearance + (nozzle count − 1) × effective spacing
How to use this calculator
  1. Select the method that matches your garden layout.
  2. Enter widths or row spacing using your preferred units.
  3. Set nozzle spacing and overlap to match your burner tips.
  4. Add edge clearance to avoid under-treating bed edges.
  5. Click Calculate and review nozzle count and coverage.
  6. Use CSV or PDF export to share and document decisions.
Download results
CSV and PDF downloads work after you calculate at least once.
Example data table
Scenario Inputs Output (typical)
Bed coverage Bed width 120 cm, spacing 20 cm, overlap 15%, edge 5 cm Length ≈ 150 cm, nozzles ≈ 8
Row span 5 rows, row spacing 30 cm, edge 5 cm Length ≈ 130 cm, nozzles = 5
Given bar Bar 150 cm, spacing 20 cm, overlap 15%, edge 5 cm Coverage ≈ 122 cm, nozzles ≈ 8
Use these as starting points, then tune spacing and overlap to your equipment.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.