🔧 Inch-Pounds to Foot-Pounds Calculator
Convert inch-pound torque into foot-pounds, batch totals, and rounded wrench settings for small hardware, service work, and audit checks.
📌 Presets
⚙ Calculator Setup
🎯 Results
📊 Reference Tables
| In-lb | Ft-lb | Mental check | Common use |
|---|---|---|---|
| 12 | 1 | 12 to 1 | Very light |
| 24 | 2 | 24 to 2 | Trim fit |
| 36 | 3 | 36 to 3 | Small cap |
| 48 | 4 | 48 to 4 | Panel screw |
| 72 | 6 | 72 to 6 | Light pack |
| 96 | 8 | 96 to 8 | Service job |
| 120 | 10 | 120 to 10 | Clamp set |
| 240 | 20 | 240 to 20 | Heavy joint |
| Hardware | Typical band | Ft-lb band | Note |
|---|---|---|---|
| Small screw | 4-12 in-lb | 0.33-1.00 | Delicate parts |
| Cabinet hinge | 20-40 in-lb | 1.67-3.33 | Light hardware |
| Machine bracket | 60-180 in-lb | 5.00-15.00 | General service |
| Chassis fastener | 180-360 in-lb | 15.00-30.00 | Sturdier joint |
| Trailer accessory | 360-720 in-lb | 30.00-60.00 | Heavier assembly |
| Tool | Practical range | Resolution | Best fit |
|---|---|---|---|
| Torque screwdriver | 6-80 in-lb | 0.1 in-lb | Micro hardware |
| 1/4 in drive | 20-200 in-lb | 0.25 in-lb | Small fittings |
| 3/8 in drive | 80-600 in-lb | 0.5 in-lb | Shop work |
| 1/2 in drive | 240-1200 in-lb | 1 in-lb | Heavier torque |
| Operation | Formula | Input note | Result note |
|---|---|---|---|
| Exact ft-lb | in-lb ÷ 12 | Use raw torque | Primary conversion |
| Reverse check | ft-lb × 12 | Use carry value | Back to in-lb |
| Batch total | per fastener × qty | Use identical pulls | Assembly total |
| Rounded set | step rounding | Pick step size | Shop display |
🧱 Spec Grid
💡 Tips
Use this calculator to convert inch-pounds to foot-pounds, total batch torque, and rounded wrench settings. It keeps small hardware work clear when the numbers are easy to misread.
Torque conversion are the process of change a measurement from inch-pounds to foot-pounds. Torque conversion is necessary in that different tool use different measurement scale. For example, a person may encounter a specification in inch-pounds, but they may only have access to a wrench that measure in foot-pounds.
To convert inch-pounds to foot-pounds, the inch-pounds measurement must be divide by twelve, there is twelve inches in one foot. However, simple division may not be enough to calculating the proper amount of torque that should be applied with a wrench to a fastener in an assembly. Many people fails to account for calibration offsets of the tools that are use.
How to Convert Inch-Pounds to Foot-Pounds
Tool calibration offset indicate that a wrench may measure higher or lower then the actual amount of torque that is being applied to a fastener. Additionally, many people may use adapter like crowfoot adapters. Crowfoot adapters may change the amount of torque that are applied to a fastener.
Therefore, the math must be adjusted to account for an effect that the adapter has on the fastener. The safety margin that is establish when calculating the amount of torque that should be applied to a fastener can help to account for various other variable that may affect the fastener, such as vibration or changes in the materials of the item that are being joined. If the fasteners that is being used are part of a group of fasteners, the total amount of torque that will be applied to that entire group of fasteners must be calculated.
Finally, the calculated amount of torque will need to be round to the nearest half or whole foot-pound measurement to ensure the setting of the wrench is easy to read. The sequence of the calculations are very important. The sequence in which the calculations must be performed is as follows: the measurement in inch-pounds must first be round to account for any calibration offset of the tools; the effect of any adapter must be factored in; the safety margin must be account for; and, finally, the total amount of torque in inch-pounds must be divided by twelve to obtain the setting of the wrench in foot-pounds.
Tools are design for specific ranges of torque that must be applied to various fasteners. For instance, torque screwdrivers is used for fasteners that require very low amount of torque (under eighty inch-pounds), for instance. Additionally, a 1/4-inch drive wrench is used for moderate amount of torque, between twenty inch-pounds and two hundred inch-pounds.
A 3/8-inch drive wrench is used for higher amounts of torque, between eighty inch-pounds and six hundred inch-pounds. Finally, a 1/2-inch drive wrench is used for very high amounts of torque. If an individual use a tool that is too large for the job that must be performed, the tool may be too coarse for the job.
Additionally, if the job require a very high amount of torque to be applied to the fastener with a wrench, using a tool that is too small for that amount of torque may make it very difficult for the individual to performing the task with accuracy. Some of the pitfalls for torque calculation include not calculating the total amount of torque for a group of fasteners, not accounting for the effect that adapters may have on the fastener, and not accounting for the fact that lubricants may affect the amount of torque that is required for dry vs. Lubricated threads. By following the mathematical process describe in this article, these pitfalls can be avoided.
By following such a process, the people who apply the torque to the fasteners will ensure that the fasteners are correctly tighten.
