Select the explosive type, then enter the explosive weight and the total item weight (casing + explosive). The calculator determines light or heavy case classification and computes the minimum safe fragmentation distance using the cube-root scaling formula: D = K × ³√(W × TNTequiv).
Safety Warning
When explosives are deliberately initiated, greater distances should be used, or action taken to reduce the hazard by:
- Confinement of the explosion at the source to the extent possible.
- Use of barricades between personnel and the explosive site.
- Evacuation of personnel not essential to the demolition operation.
- Provision of overhead cover for personnel where possible.
There is no "safe" procedure for rendering safe and disposal, merely a procedure which is considered least dangerous. However, maximum safety in any EOD operation can be achieved through adherence to applicable safety precautions.
— TM 60A-1-1-21 & TM 60A-1-1-22
Select the explosive type and enter the weight, then click + Add Item to add it to the list. You can add multiple items of different types to build a running total. Select the target or blast effect type, and the calculator computes the minimum safe blast distance based on the total TNT-equivalent weight and the target's overpressure threshold.
Safety Warning
When explosives are deliberately initiated, greater distances should be used, or action taken to reduce the hazard by:
- Confinement of the explosion at the source to the extent possible.
- Use of barricades between personnel and the explosive site.
- Evacuation of personnel not essential to the demolition operation.
- Provision of overhead cover for personnel where possible.
There is no "safe" procedure for rendering safe and disposal, merely a procedure which is considered least dangerous. However, maximum safety in any EOD operation can be achieved through adherence to applicable safety precautions.
— TM 60A-1-1-21 & TM 60A-1-1-22
The standoff table shows DHS/ATF recommended minimum evacuation distances by threat type. Below, select an explosive type and charge size to view injury band distances based on the Kingery-Bulmash blast model. Distances represent free-air burst; for hemispherical surface burst, multiply by approximately 1.1×.
Based on DHS/ATF guidelines. Distances represent minimum recommended evacuation distances.
| Threat Description | Max. Explosive Capacity | Building Evac. | Outdoor Evac. |
|---|
Distances are approximate. Based on Kingery-Bulmash scaled distance model using TNT-equivalent charge weight. Free-air burst assumed; hemispherical surface burst distances are approximately 1.1x greater.
Safety Warning
When explosives are deliberately initiated, greater distances should be used, or action taken to reduce the hazard by:
- Confinement of the explosion at the source to the extent possible.
- Use of barricades between personnel and the explosive site.
- Evacuation of personnel not essential to the demolition operation.
- Provision of overhead cover for personnel where possible.
There is no "safe" procedure for rendering safe and disposal, merely a procedure which is considered least dangerous. However, maximum safety in any EOD operation can be achieved through adherence to applicable safety precautions.
— TM 60A-1-1-21 & TM 60A-1-1-22
Select the explosive type, enter the weight per item and quantity, then click + Add to build a list of items. The calculator totals the Net Explosive Weight (NEW), converts to TNT equivalent, and provides Quantity-Distance (QD) requirements for HD 1.1 storage per DDESB 6055.09.
Safety Warning
When explosives are deliberately initiated, greater distances should be used, or action taken to reduce the hazard by:
- Confinement of the explosion at the source to the extent possible.
- Use of barricades between personnel and the explosive site.
- Evacuation of personnel not essential to the demolition operation.
- Provision of overhead cover for personnel where possible.
There is no "safe" procedure for rendering safe and disposal, merely a procedure which is considered least dangerous. However, maximum safety in any EOD operation can be achieved through adherence to applicable safety precautions.
— TM 60A-1-1-21 & TM 60A-1-1-22