It ended the long-running diplomatic clashes over Pomerelia, including Gdańsk, an area that the Teutonic Order had possessed since 1308 and viewed as its legal property since the Treaty of Soldin (1309) with the Margraves of Brandenburg.

This peace treaty meant territorial concessions from Poland, but from the point of view of the Polish "raison d'état," it had to be concluded.

From which it emerged that the Brandenburg Ascanians in December 1231, in Ravenna, were enfeoffed with the Duchy of Pomerania by the Roman-German Emperor Frederick II.

A great success of Polish diplomacy was the resignation of the formula of "Pomerelia as perpetual alms" for the Teutonic Order, developed in 1335 at the Congress of Visegrád, where King Casimir III was obliged to accept this earlier and much less favourable decision.

The formula "perpetual alms" meant a significant expropriation of lands that historically and ethnographically belonged to Poland[1] and were illegally taken over by the Teutonic Order in 1308.

King Casimir III argued that this formula also forced Poland to become a benefactor and patron of the Teutonic Order, obliging them to provide military assistance and honorary tributes in money and in kind.

The Kalisz terms of peace, despite the possibility of a delay in the recovery of the lands of Pomerelia, were extremely important in solidifying the idea of the unification of the Polish Kingdom.

As a result, while Pomerelia remained a subject of contention, the treaty was followed by 66 years of peace between the Kingdom of Poland and the Teutonic Order, until the conflict erupted again in the Polish–Lithuanian–Teutonic War of 1409.