Create metric groove layouts with confidence. Estimate squeeze, stretch, side clearance, and gland fill instantly. Use this calculator for consistent sealing design decisions today.
| O Ring ID (mm) | Cross Section (mm) | Squeeze (%) | Stretch (%) | Max Fill (%) | Groove Depth (mm) | Groove Width (mm) |
|---|---|---|---|---|---|---|
| 20.000 | 3.000 | 18.00 | 2.00 | 85.00 | 2.460 | 3.880 |
| 35.500 | 4.000 | 16.00 | 1.50 | 82.00 | 3.360 | 4.943 |
| 50.000 | 5.300 | 20.00 | 1.00 | 85.00 | 4.240 | 6.086 |
1. Free O Ring OD
Free O Ring OD = O Ring ID + (2 × Cross Section)
2. Installed O Ring ID
Installed O Ring ID = O Ring ID × (1 + Stretch ÷ 100)
3. Groove Depth
Groove Depth = Cross Section × (1 − Squeeze ÷ 100)
4. O Ring Area
O Ring Area = π × Cross Section² ÷ 4
5. Required Groove Area
Required Groove Area = O Ring Area ÷ (Max Fill ÷ 100)
6. Groove Width
Groove Width = (Required Groove Area ÷ Groove Depth) + (2 × Side Clearance) + Extra Width Allowance
7. Estimated Gland Fill
Estimated Gland Fill = O Ring Area ÷ (Groove Depth × Groove Width) × 100
A metric O ring groove dimensions calculator helps you size grooves with better consistency. Groove depth controls squeeze. Groove width controls gland fill. Both values affect sealing force, friction, wear, and assembly fit. A shallow groove can over compress the seal. A deep groove can reduce sealing contact. A narrow groove can overfill the gland. A wide groove can reduce control during pressure changes. This calculator gives a fast estimate for static and dynamic layouts.
Groove depth usually starts with the O ring cross section and the target squeeze. Squeeze is the amount of controlled compression after installation. Static seals often allow more squeeze than dynamic seals. Stretch also matters. When the O ring is stretched during fitting, the installed inside diameter changes. That affects the seal position and can influence long term performance. This page uses your selected squeeze and stretch values to estimate practical groove dimensions in millimeters.
Groove width should provide enough room for the O ring volume. It should also allow normal manufacturing variation and thermal growth. Gland fill is a useful design check. A very high fill percentage can create excess stress during pressure and temperature swings. A low fill percentage can reduce support. Side clearance and width allowance help you build a groove that is easier to machine and inspect. These checks are useful for piston glands, rod glands, and face seals.
This calculator is designed for quick design work, quoting, and early review. It is useful when comparing options or checking a seal layout before detailing a drawing. The output includes groove depth, groove width, installed diameters, gland area, free volume, and a corner radius suggestion. These values support better decisions during metric seal design. Final dimensions should still be checked against your material data, pressure limits, hardware tolerances, and the sealing standard used by your project.
It estimates groove depth, groove width, installed O ring dimensions, gland area, fill percentage, free volume, and a basic corner radius for metric seal design.
Yes. You can choose static or dynamic motion. The result also shows a typical squeeze guide so you can compare your input against a common design window.
Squeeze creates sealing contact. Too little squeeze can reduce sealing force. Too much squeeze can increase friction, heat, wear, and assembly difficulty.
Gland fill shows how much of the groove volume is occupied by the O ring cross section. High fill can reduce space for expansion and pressure changes.
No. It is a quick engineering estimate. Final values should be reviewed against your drawing tolerance, material hardness, pressure level, and the seal standard you follow.
All dimensional inputs and outputs use millimeters. Percent based inputs, such as squeeze, stretch, and gland fill, should be entered as percentages.
Yes. Select the face seal option. The calculator still uses the same area and squeeze logic, but the guidance range changes to match face sealing practice.
Compare the output with your seal material limits, machining method, temperature range, pressure duty, and hardware tolerances before releasing a final groove drawing.
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.