Soviet AntiTank Belt
Calculations

References:
TM
30430 Handbook on USSR Military Forces, 1 November
1945
Kursk: Hitler's Gamble, 1943 by Walter Scott Dunn
(Mentioned)
G = (T * K) / (S * (A/B) )
where
G = Guns needed per kilometer of frontage
T = number of enemy tanks expected to attack 1 km of front
K = number of rounds required to stop one enemy tank
S = number of rounds fired per minute
A = maximum distance at which a tank can be destroyed (meters)
B = distance a tank can move in one minute (meters)
B can be found using this list:
5 km/h = Approx. 80 meters per minute (Dismounted Infantry on
Foot)
10 km/h = Approx. 170 meters per minute
15 km/h = Approx.
250 meters per minute
20 km/h = Approx. 330 meters per minute
(WWII Tanks)
25 km/h = Approx. 420 meters per minute
30 km/h =
Approx. 500 meters per minute (1970s and later Tanks)
Fifty enemy tanks are to attack, and on average 4 rounds are needed to destroy them.
The antitank guns can fire 10 rounds per minute and can kill the tanks at 600 meters, while the average crosscountry distance the enemy tanks can move in one minute is 300 meters.
G = (50 * 4) / (10 * (600/300) ) = 10 Anti Tank Guns needed
Fifty enemy tanks are to attack, and on average 1.15 ATGMs are needed to destroy them.
The ATGM launchers can fire 2 missiles per minute and can kill the tanks at 3,000 meters, while the average crosscountry distance the enemy tanks can move in one minute is 500 meters.
G = (50 * 1.15) / (2 * (3000/500) ) = 4.79 ATGM Launchers needed