1000 tons. The relationship among pressure (P), force (F) and action area (A) can be expressed by the following mathematical formula: P times A equals F. As we know, force equals pressure times action area, and only the pressure value is given in the title, but the action area is not given. Therefore, a default or known action area is needed for calculation, and the calculation result is that the tonnage force corresponding to 1000mpa is 65430.