# Ballistic Energy Calc

Android app · by Things and Stuff LTD · Tools

Ballistic Energy Calc has 18,947 installs, rated 5.0 from 90 ratings, \#34,968 of 248,245 in Tools.

## Figures

- Installs: 18,947
- Rating: 5.0 · 90 ratings
- Price: Free
- In-app purchases: no
- 7-day growth in installs: +2 (+0.0%) (+5 over 16 days)
- 30-day growth in installs: +15 (+0.1%)
- Rank: #390,657 of 2,995,374 Android listings with an install count (down 22,547 since 2026-11-01)
- Rank: #34,968 of 248,245 in Tools

## Is Ballistic Energy Calc safe?

StoreTally doesn't rate safety. Here's what the store and our tracking show:

- Listed on Google Play.
- Made by Things and Stuff LTD; developer website listed: techandtopics.blogspot.com.
- On Google Play since 2011-08-26. Last updated 2023-05-07 (over 2 years ago).
- Rated 5.0 from 90 ratings.

## Reviews

- Ratings by stars: 5★ 100% · 4★ 0% · 3★ 0% · 2★ 0% · 1★ 0% (90 ratings)

## Description

This app calculates the muzzle energy, momentum, power factor, and Taylor KO factor for a projectile based on the mass, velocity, and diameter. Muzzle energy is computed using the firearm industry's standard formula. Momentum is calculated using the standard formula. Power factor is mass in grains multiplied by velocity in feet per second, divided by 1000. This is used in IDPA and USPSA competitions. Taylor KO factor is a comparative measure of the knock-down power of a projectile. The formula was developed by John Taylor, an African game hunter, to compare the effectiveness of hunting cartridges.  
  
The calculations in this app can be useful for hunting, reloading, target shooting, archery, and other activities involving projectiles.  
  
Support located at techandtopics.blogspot.com  
  
Supplied under the GNU GPL 3.0

---

Source: https://storetally.com/android/com.blogspot.techandtopics  
As of 2026-11-15, from the StoreTally census.