A rough estimate is about 1.3 million 155 mm shells to make 60,000 tons. Using a typical shell weight of about 43.2 kg per round, 60,000,000÷43.2≈1,388,88960{,}000{,}000\div 43.2\approx 1{,}388{,}88960,000,000÷43.2≈1,388,889, so the answer is approximately 1.39 million shells.

Assumption used

This estimate assumes you mean 60,000 metric tons and a standard 155 mm projectile weighing around 43.2 kg. Different 155 mm shell variants can weigh a bit more or less, so the count can shift slightly.

Quick math

  • 60,000 tons = 60,000,000 kg.
  • 60,000,000 kg ÷ 43.2 kg per shell ≈ 1,388,889 shells.
  • Rounded: about 1.4 million shells.

If you use a heavier shell

Some 155 mm ammunition is listed around 44.6 to 46.6 kg , which would reduce the count a little. At 46.6 kg , 60,000 tons would be about 1.29 million shells.

Bottom line

For a standard 155 mm shell, the best estimate is about 1.39 million shells.