Garden Hose Pressure Calculator
Estimate the water pressure at the hose end based on length, diameter and source pressure – ideal for sprinklers & irrigation.
The longer and thinner a garden hose, the more pressure is lost to friction. This calculator estimates the remaining pressure at the hose end based on source pressure, length, diameter and flow rate.
Pro tips
- A larger hose diameter significantly reduces pressure loss.
- Couplings and kinks in the hose add further pressure loss.
Frequently Asked Questions
Why does my garden hose lose pressure at the end?
Friction inside the hose causes pressure loss – the longer and thinner the hose and the higher the flow rate, the bigger the loss.
Which hose diameter is best for the garden?
For most uses 1/2" (about 13 mm) is enough; for long runs or high water demand (e.g. sprinklers), 3/4" (about 19 mm) preserves pressure better.
How much pressure does a sprinkler need?
Most sprinklers need at least 1.5-2 bar at the hose end to spray evenly with sufficient reach.
Can I connect multiple hoses together?
Yes, but every extra coupling and every meter of hose adds pressure loss – for long runs, a single thicker hose works better.