Hose, Tubing & Fluid Conveyance Products calculator
Bend Radius Check Calculator
Check whether the tightest bend in a hose or tubing route meets the manufacturer minimum. Bending tighter than the minimum can cause kinking, flow restriction, accelerated wear, and premature failure. Enter installed bend radius, minimum bend radius, and a reference value.
What this calculator does
- Check whether the installed bend radius of a hose or tubing assembly meets the manufacturer minimum bend radius, and see the margin above the minimum.
- Use it when routing a hose assembly in a machine or system and need to confirm the tightest bend meets the manufacturer minimum bend radius requirement.
- Checks whether the installed hose or tubing bend radius meets the manufacturer minimum and shows the margin.
Formula used
- Bend radius margin = installed bend radius - minimum bend radius
- Bend radius margin percent = bend radius margin / reference bend radius x 100
Inputs explained
- Installed or routed bend radius: Center-line radius of the tightest bend in the installed hose route, measured in inches.
- Minimum bend radius (manufacturer spec): Minimum allowable bend radius from the hose manufacturer specification for this hose series and nominal size.
- Reference bend radius: Use minimum bend radius as the reference to normalize the margin percent.
How to use the result
- Use it during routing design, assembly inspection, or installation review to prevent kinking and premature failure.
- It checks a single bend. Route the entire hose and check each critical bend location separately.
Common questions
- What is the Bend Radius Check calculator for? It checks whether the installed or routed bend radius of a hose or tubing assembly meets the manufacturer minimum, and shows the margin.
- What numbers do I need before using it? You need the installed center-line bend radius and the minimum bend radius from the hose manufacturer specification.
- How should I use the result? A positive margin means the bend complies. A negative margin means the route must be redesigned to prevent kinking and premature failure.
- When is the result only an estimate? It is an estimate when the installed radius cannot be precisely measured, or when pressure or motion loading further tightens the bend.
Last reviewed 2026-05-12.