Plan hoses for grills, fire pits, and patio kitchens. Compare diameters, bends, and slack instantly. Keep the flame steady with safer routing choices today.
| Scenario | Straight Distance | Routing Factor | Detour % | Bends | Slack | Recommended Purchase |
|---|---|---|---|---|---|---|
| Patio grill near garden edge | 8.0 m | 1.15 | 8% | 2 | 1.0 m | ≈ 12.0 m |
| Fire pit with longer route | 12.0 m | 1.25 | 12% | 4 | 1.5 m | ≈ 19.5 m |
| Compact heater setup | 5.0 m | 1.10 | 5% | 1 | 0.8 m | ≈ 8.0 m |
Outdoor gas connections often fail due to routing shortcuts, not equipment defects. A length estimate should reflect the real walking path, protected edges, and connection clearances. This calculator converts a measured straight line into a practical purchase length, helping reduce stretching, kinks, and fitting strain around patios and planting beds.
Straight distance rarely matches installation distance because hoses must avoid heat sources, sharp corners, and door swings. The routing factor accounts for normal turns and edge-following. The detour percent adds a controlled margin for furniture layouts, seasonal planters, and temporary obstructions without overbuying excessive hose.
Tight bends increase resistance and can shorten hose life. Instead of guessing, you can assign an equivalent length per bend and include vertical rise when routing up steps or deck rails. Connection allowance and slack create gentle service loops at both ends, making disconnection safer and reducing twisting loads on valves.
Longer hoses can reduce delivered pressure, especially with smaller diameters and higher BTU loads. The screening check estimates flow from BTU per hour and flags runs that may experience noticeable pressure drop. Treat it as an early warning tool; final sizing should follow the appliance manual and local requirements.
Purchase length is rounded up to common increments so you can match retail sizes. Store hoses with protective caps, keep them off sharp gravel, and re-check connections after moving grills or fire pits. Replace hoses showing cracking, abrasion, or persistent odor.
The calculator adds routing, detours, bends, rise, connection loops, and slack. These allowances prevent stretching and kinking, and they help protect fittings when the appliance is moved slightly.
Many garden layouts fall between 1.10 and 1.30. Choose the higher end if the hose must follow walls, edges, or protected channels rather than a direct crossing route.
Yes. Bends add resistance and can reduce flow, especially on smaller diameters. Counting bends and assigning an equivalent length is a practical way to avoid underestimating real installation length.
No. It is a screening estimate to flag obvious risks. Final sizing must follow the appliance manual, hose manufacturer limits, and any applicable local requirements for outdoor gas installations.
Add enough slack to form gentle loops and allow safe connection without strain. For movable grills or fire pits, 0.8–1.5 meters is common, depending on how far the unit is repositioned.
Consider a larger diameter if your run is long, your BTU load is high, or the screening drop is flagged. Increasing diameter can reduce resistance and help maintain steadier burner performance.
Check for cracks, abrasion, flattened sections, and corrosion at fittings. Verify connections are tight and leak-free. If you notice persistent gas odor or damaged surfaces, replace the hose promptly.
The recommended length is built from a practical routing estimate:
Total Length = (Distance × Routing Factor) + Detour + (Bends × Bend Equivalent) + Rise + (2 × Connection Allowance) + Slack
A simple screening check estimates pressure drop from flow, hose diameter, and length. Use it only to flag obvious issues, not as a final design value.
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.